add swap status to the report

Signed-off-by: Egor Savkin <es@m-labs.hk>

README.md

@@ -67,7 +67,19 @@ On a Windows machine install [st.com](https://st.com) DfuSe USB device firmware
 openocd -f interface/stlink.cfg -f target/stm32f4x.cfg -c "program target/thumbv7em-none-eabihf/release/thermostat verify reset;exit"
 ```
 
-## Network
+## GUI Usage
+
+A GUI has been developed for easy configuration and plotting of key parameters.
+
+The Python GUI program is located at pytec/tec_qt.py.
+
+The GUI is developed based on the Python library pyqtgraph. The GUI can be configured and launched automatically by running:
+
+```
+nix run .#thermostat_gui
+```
+
+## Command Line Usage
 
 ### Connecting
 
@@ -130,6 +142,7 @@ formatted as line-delimited JSON.
 | `fcurve <a> <b> <c>`             | Set fan controller curve coefficients (see *Fan control* section)             |
 | `fcurve default`                 | Set fan controller curve coefficients to defaults (see *Fan control* section) |
 | `hwrev`                          | Show hardware revision, and settings related to it                            |
+| `swap`                           | Swap TEC polarities for all channels (For use with Zotino)                    |
 
 
 ## USB

flake.lock

@@ -18,16 +18,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1691421349,
-        "narHash": "sha256-RRJyX0CUrs4uW4gMhd/X4rcDG8PTgaaCQM5rXEJOx6g=",
+        "lastModified": 1701156937,
+        "narHash": "sha256-jpMJOFvOTejx211D8z/gz0ErRtQPy6RXxgD2ZB86mso=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "011567f35433879aae5024fc6ec53f2a0568a6c4",
+        "rev": "7c4c20509c4363195841faa6c911777a134acdf3",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-23.05",
+        "ref": "nixos-23.11",
         "repo": "nixpkgs",
         "type": "github"
       }

flake.nix

@@ -1,7 +1,7 @@
 {
   description = "Firmware for the Sinara 8451 Thermostat";
 
-  inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-23.05;
+  inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-23.11;
   inputs.mozilla-overlay = { url = github:mozilla/nixpkgs-mozilla; flake = false; };
 
   outputs = { self, nixpkgs, mozilla-overlay }:
@@ -55,9 +55,41 @@
 
         dontFixup = true;
       };
+
+      pglive = pkgs.python3Packages.buildPythonPackage rec {
+        pname = "pglive";
+        version = "0.7.2";
+        format = "pyproject";
+        src = pkgs.fetchPypi {
+          inherit pname version;
+          hash = "sha256-jqj8X6H1N5mJQ4OrY5ANqRB0YJByqg/bNneEALWmH1A=";
+        };
+        buildInputs = [ pkgs.python3Packages.poetry-core ];
+        propagatedBuildInputs = with pkgs.python3Packages; [ pyqtgraph numpy ];
+      };
+
+      thermostat_gui = pkgs.python3Packages.buildPythonPackage {
+        pname = "thermostat_gui";
+        version = "0.0.0";
+        format = "pyproject";
+        src = "${self}/pytec";
+
+        nativeBuildInputs = [ pkgs.qt6.wrapQtAppsHook ];
+        propagatedBuildInputs = [ pkgs.qt6.qtbase ] ++ (with pkgs.python3Packages; [ pyqtgraph pyqt6 qasync pglive ]);
+
+        dontWrapQtApps = true;
+        postFixup = ''
+          wrapQtApp "$out/bin/tec_qt"
+        '';
+      };
     in {
       packages.x86_64-linux = {
-        inherit thermostat;
+        inherit thermostat thermostat_gui;
+      };
+
+      apps.x86_64-linux.thermostat_gui = {
+        type = "app";
+        program = "${self.packages.x86_64-linux.thermostat_gui}/bin/tec_qt";
       };
 
       hydraJobs = {
@@ -69,7 +101,7 @@
         buildInputs = with pkgs; [
           rust openocd dfu-util
           ] ++ (with python3Packages; [
-            numpy matplotlib
+            numpy matplotlib pyqtgraph setuptools pyqt6 qasync pglive
           ]);
       };
       defaultPackage.x86_64-linux = thermostat;

pytec/aioexample.py

@@ -0,0 +1,16 @@
+import asyncio
+from pytec.aioclient import Client
+
+async def main():
+    tec = Client()
+    await tec.start_session() #(host="192.168.1.26", port=23)
+    await tec.set_param("s-h", 1, "t0", 20)
+    print(await tec.get_pwm())
+    print(await tec.get_pid())
+    print(await tec.get_pwm())
+    print(await tec.get_postfilter())
+    print(await tec.get_steinhart_hart())
+    async for data in tec.report_mode():
+        print(data)
+
+asyncio.run(main())

pytec/autotune.py

@@ -17,6 +17,7 @@ class PIDAutotuneState(Enum):
     STATE_RELAY_STEP_DOWN = 'relay step down'
     STATE_SUCCEEDED = 'succeeded'
     STATE_FAILED = 'failed'
+    STATE_READY = 'ready'
 
 
 class PIDAutotune:
@@ -56,6 +57,20 @@ class PIDAutotune:
         self._Ku = 0
         self._Pu = 0
 
+    def setParam(self, target, step, noiseband, sampletime, lookback):
+        self._setpoint = target
+        self._outputstep = step
+        self._out_max = step
+        self._out_min = -step
+        self._noiseband = noiseband
+        self._inputs = deque(maxlen=round(lookback / sampletime))
+
+    def setReady(self):
+        self._state = PIDAutotuneState.STATE_READY
+
+    def setOff(self):
+        self._state = PIDAutotuneState.STATE_OFF
+
     def state(self):
         """Get the current state."""
         return self._state
@@ -81,6 +96,13 @@ class PIDAutotune:
         kd = divisors[2] * self._Ku * self._Pu
         return PIDAutotune.PIDParams(kp, ki, kd)
 
+    def get_tec_pid (self):
+        divisors = self._tuning_rules["tyreus-luyben"]
+        kp = self._Ku * divisors[0]
+        ki = divisors[1] * self._Ku / self._Pu
+        kd = divisors[2] * self._Ku * self._Pu
+        return kp, ki, kd
+
     def run(self, input_val, time_input):
         """To autotune a system, this method must be called periodically.
 
@@ -95,7 +117,8 @@ class PIDAutotune:
 
         if (self._state == PIDAutotuneState.STATE_OFF
                 or self._state == PIDAutotuneState.STATE_SUCCEEDED
-                or self._state == PIDAutotuneState.STATE_FAILED):
+                or self._state == PIDAutotuneState.STATE_FAILED
+                or self._state == PIDAutotuneState.STATE_READY):
             self._state = PIDAutotuneState.STATE_RELAY_STEP_UP
 
         self._last_run_timestamp = now
@@ -199,20 +222,20 @@ class PIDAutotune:
             # calculate ultimate gain
             self._Ku = 4.0 * self._outputstep / \
                 (self._induced_amplitude * math.pi)
-            print('Ku: {0}'.format(self._Ku))
+            logging.debug('Ku: {0}'.format(self._Ku))
 
             # calculate ultimate period in seconds
             period1 = self._peak_timestamps[3] - self._peak_timestamps[1]
             period2 = self._peak_timestamps[4] - self._peak_timestamps[2]
             self._Pu = 0.5 * (period1 + period2) / 1000.0
-            print('Pu: {0}'.format(self._Pu))
+            logging.debug('Pu: {0}'.format(self._Pu))
 
             for rule in self._tuning_rules:
                 params = self.get_pid_parameters(rule)
-                print('rule: {0}'.format(rule))
-                print('Kp: {0}'.format(params.Kp))
-                print('Ki: {0}'.format(params.Ki))
-                print('Kd: {0}'.format(params.Kd))
+                logging.debug('rule: {0}'.format(rule))
+                logging.debug('Kp: {0}'.format(params.Kp))
+                logging.debug('Ki: {0}'.format(params.Ki))
+                logging.debug('Kd: {0}'.format(params.Kd))
 
             return True
         return False

pytec/plot.py

@@ -30,15 +30,15 @@ class Series:
 series = {
     # 'adc': Series(),
     # 'sens': Series(lambda x: x * 0.0001),
-    'temperature': Series(),
-    # 'i_set': Series(),
-    'pid_output': Series(),
+    # 'temperature': Series(),
+    'i_set': Series(),
+    # 'pid_output': Series(),
     # 'vref': Series(),
     # 'dac_value': Series(),
     # 'dac_feedback': Series(),
-    # 'i_tec': Series(),
+    'i_tec': Series(),
     'tec_i': Series(),
-    'tec_u_meas': Series(),
+    # 'tec_u_meas': Series(),
     # 'interval': Series(),
 }
 series_lock = Lock()

pytec/pyproject.toml

@@ -0,0 +1,18 @@
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "pytec"
+version = "0.0"
+authors = [{name = "M-Labs"}]
+description = "Control TEC"
+urls.Repository = "https://git.m-labs.hk/M-Labs/thermostat"
+license = {text = "GPLv3"}
+
+[project.gui-scripts]
+tec_qt = "tec_qt:main"
+
+[tool.setuptools]
+packages.find = {}
+py-modules = ["aioexample", "autotune", "example", "plot", "tec_qt", "ui_tec_qt", "waitingspinnerwidget"]

pytec/pytec/aioclient.py

@@ -0,0 +1,279 @@
+import asyncio
+import json
+import logging
+
+class CommandError(Exception):
+    pass
+
+class StoppedConnecting(Exception):
+    pass
+
+class Client:
+    def __init__(self):
+        self._reader = None
+        self._writer = None
+        self._connecting_task = None
+        self._command_lock = asyncio.Lock()
+        self._report_mode_on = False
+        self.timeout = None
+
+    async def start_session(self, host='192.168.1.26', port=23, timeout=None):
+        """Start session to Thermostat at specified host and port.
+        Throws StoppedConnecting if disconnect was called while connecting.
+        Throws asyncio.TimeoutError if timeout was exceeded.
+
+        Example::
+            client = Client()
+            try:
+                await client.start_session()
+            except StoppedConnecting:
+                print("Stopped connecting")
+        """
+        self._connecting_task = asyncio.create_task(
+            asyncio.wait_for(asyncio.open_connection(host, port), timeout)
+        )
+        self.timeout = timeout
+        try:
+            self._reader, self._writer = await self._connecting_task
+        except asyncio.CancelledError:
+            raise StoppedConnecting
+        finally:
+            self._connecting_task = None
+
+        await self._check_zero_limits()
+
+    def connecting(self):
+        """Returns True if client is connecting"""
+        return self._connecting_task is not None
+
+    def connected(self):
+        """Returns True if client is connected"""
+        return self._writer is not None
+
+    async def end_session(self):
+        """End session to Thermostat if connected, cancel connection if connecting"""
+        if self._connecting_task is not None:
+            self._connecting_task.cancel()
+
+        if self._writer is None:
+            return
+
+        # Reader needn't be closed
+        self._writer.close()
+        await self._writer.wait_closed()
+        self._reader = None
+        self._writer = None
+
+    async def _check_zero_limits(self):
+        pwm_report = await self.get_pwm()
+        for pwm_channel in pwm_report:
+            for limit in ["max_i_neg", "max_i_pos", "max_v"]:
+                if pwm_channel[limit]["value"] == 0.0:
+                    logging.warning("`{}` limit is set to zero on channel {}".format(limit, pwm_channel["channel"]))
+
+    async def _read_line(self):
+        # read 1 line
+        chunk = await asyncio.wait_for(self._reader.readline(), self.timeout) # Only wait for response until timeout
+        return chunk.decode('utf-8', errors='ignore')
+
+    async def _read_write(self, command):
+        self._writer.write(((" ".join(command)).strip() + "\n").encode('utf-8'))
+        await self._writer.drain()
+
+        return await self._read_line()
+
+    async def _command(self, *command):
+        async with self._command_lock:
+            # protect the read-write process from being cancelled midway
+            line = await asyncio.shield(self._read_write(command))
+
+        response = json.loads(line)
+        logging.debug(f"{command}: {response}")
+        if "error" in response:
+            raise CommandError(response["error"])
+        return response
+
+    async def _get_conf(self, topic):
+        result = [None, None]
+        for item in await self._command(topic):
+            result[int(item["channel"])] = item
+        return result
+
+    async def get_pwm(self):
+        """Retrieve PWM limits for the TEC
+
+        Example::
+            [{'channel': 0,
+              'center': 'vref',
+              'i_set': {'max': 2.9802790335151985, 'value': -0.02002179650216762},
+              'max_i_neg': {'max': 3.0, 'value': 3.0},
+              'max_v': {'max': 5.988, 'value': 5.988},
+              'max_i_pos': {'max': 3.0, 'value': 3.0}},
+             {'channel': 1,
+              'center': 'vref',
+              'i_set': {'max': 2.9802790335151985, 'value': -0.02002179650216762},
+              'max_i_neg': {'max': 3.0, 'value': 3.0},
+              'max_v': {'max': 5.988, 'value': 5.988},
+              'max_i_pos': {'max': 3.0, 'value': 3.0}}
+            ]
+        """
+        return await self._get_conf("pwm")
+
+    async def get_pid(self):
+        """Retrieve PID control state
+
+        Example::
+            [{'channel': 0,
+              'parameters': {
+                  'kp': 10.0,
+                  'ki': 0.02,
+                  'kd': 0.0,
+                  'output_min': 0.0,
+                  'output_max': 3.0},
+              'target': 37.0},
+             {'channel': 1,
+              'parameters': {
+                  'kp': 10.0,
+                  'ki': 0.02,
+                  'kd': 0.0,
+                  'output_min': 0.0,
+                  'output_max': 3.0},
+              'target': 36.5}]
+        """
+        return await self._get_conf("pid")
+
+    async def get_steinhart_hart(self):
+        """Retrieve Steinhart-Hart parameters for resistance to temperature conversion
+
+        Example::
+            [{'params': {'b': 3800.0, 'r0': 10000.0, 't0': 298.15}, 'channel': 0},
+             {'params': {'b': 3800.0, 'r0': 10000.0, 't0': 298.15}, 'channel': 1}]
+        """
+        return await self._get_conf("s-h")
+
+    async def get_postfilter(self):
+        """Retrieve DAC postfilter configuration
+
+        Example::
+            [{'rate': None, 'channel': 0},
+             {'rate': 21.25, 'channel': 1}]
+        """
+        return await self._get_conf("postfilter")
+
+    async def get_fan(self):
+        """Get Thermostat current fan settings"""
+        return await self._command("fan")
+
+    async def report(self):
+        """Obtain one-time report on measurement values"""
+        return await self._command("report")
+
+    async def report_mode(self):
+        """Start reporting measurement values
+
+        Example of yielded data::
+            {'channel': 0,
+             'time': 2302524,
+             'adc': 0.6199188965423515,
+             'sens': 6138.519310282602,
+             'temperature': 36.87032392655527,
+             'pid_engaged': True,
+             'i_set': 2.0635816680889123,
+             'vref': 1.494,
+             'dac_value': 2.527790834044456,
+             'dac_feedback': 2.523,
+             'i_tec': 2.331,
+             'tec_i': 2.0925,
+             'tec_u_meas': 2.5340000000000003,
+             'pid_output': 2.067581958092247}
+        """
+        await self._command("report mode", "on")
+        self._report_mode_on = True
+
+        while self._report_mode_on:
+            async with self._command_lock:
+                line = await self._read_line()
+            if not line:
+                break
+            try:
+                yield json.loads(line)
+            except json.decoder.JSONDecodeError:
+                pass
+
+        await self._command("report mode", "off")
+
+    def stop_report_mode(self):
+        self._report_mode_on = False
+
+    async def set_param(self, topic, channel, field="", value=""):
+        """Set configuration parameters
+
+        Examples::
+            await tec.set_param("pwm", 0, "max_v", 2.0)
+            await tec.set_param("pid", 1, "output_max", 2.5)
+            await tec.set_param("s-h", 0, "t0", 20.0)
+            await tec.set_param("center", 0, "vref")
+            await tec.set_param("postfilter", 1, 21)
+
+        See the firmware's README.md for a full list.
+        """
+        if type(value) is float:
+            value = "{:f}".format(value)
+        if type(value) is not str:
+            value = str(value)
+        await self._command(topic, str(channel), field, value)
+
+    async def set_fan(self, power="auto"):
+        """Set fan power"""
+        await self._command("fan", str(power))
+
+    async def set_fcurve(self, a=1.0, b=0.0, c=0.0):
+        """Set fan curve"""
+        await self._command("fcurve", str(a), str(b), str(c))
+
+    async def power_up(self, channel, target):
+        """Start closed-loop mode"""
+        await self.set_param("pid", channel, "target", value=target)
+        await self.set_param("pwm", channel, "pid")
+
+    async def save_config(self, channel=""):
+        """Save current configuration to EEPROM"""
+        await self._command("save", str(channel))
+
+    async def load_config(self, channel=""):
+        """Load current configuration from EEPROM"""
+        await self._command("load", str(channel))
+        if channel == "":
+            await self._read_line() # Read the extra {}
+
+    async def hw_rev(self):
+        """Get Thermostat hardware revision"""
+        return await self._command("hwrev")
+
+    async def reset(self):
+        """Reset the Thermostat
+        
+        The client is disconnected as the TCP session is terminated.
+        """
+        async with self._command_lock:
+            self._writer.write("reset\n".encode('utf-8'))
+            await self._writer.drain()
+
+        await self.end_session()
+
+    async def dfu(self):
+        """Put the Thermostat in DFU update mode
+        
+        The client is disconnected as the Thermostat stops responding to
+        TCP commands in DFU update mode. The only way to exit it is by
+        power-cycling.
+        """
+        async with self._command_lock:
+            self._writer.write("dfu\n".encode('utf-8'))
+            await self._writer.drain()
+
+        await self.end_session()
+
+    async def ipv4(self):
+        """Get the IPv4 settings of the Thermostat"""
+        return await self._command('ipv4')

pytec/pytec/client.py

@@ -11,6 +11,10 @@ class Client:
         self._lines = [""]
         self._check_zero_limits()
 
+    def disconnect(self):
+        self._socket.shutdown(socket.SHUT_RDWR)
+        self._socket.close()
+
     def _check_zero_limits(self):
         pwm_report = self.get_pwm()
         for pwm_channel in pwm_report:
@@ -32,10 +36,11 @@ class Client:
         return line
 
     def _command(self, *command):
-        self._socket.sendall((" ".join(command) + "\n").encode('utf-8'))
+        self._socket.sendall(((" ".join(command)).strip() + "\n").encode('utf-8'))
 
         line = self._read_line()
         response = json.loads(line)
+        logging.debug(f"{command}: {response}")
         if "error" in response:
             raise CommandError(response["error"])
         return response
@@ -167,3 +172,11 @@ class Client:
     def load_config(self):
         """Load current configuration from EEPROM"""
         self._command("load")
+
+    def hw_rev(self):
+        """Get Thermostat hardware revision"""
+        return self._command("hwrev")
+
+    def fan(self):
+        """Get Thermostat current fan settings"""
+        return self._command("fan")

pytec/setup.py

@@ -9,4 +9,10 @@ setup(
     license="GPLv3",
     install_requires=["setuptools"],
     packages=find_packages(),
+    entry_points={
+        "gui_scripts": [
+            "tec_qt = tec_qt:main",
+        ]
+    },
+    py_modules=['tec_qt', 'ui_tec_qt', 'autotune', 'waitingspinnerwidget'],
 )

pytec/tec_qt.py

@@ -0,0 +1,903 @@
+from PyQt6 import QtWidgets, QtGui, QtCore
+from PyQt6.QtCore import pyqtSignal, QObject, QSignalBlocker, pyqtSlot
+import pyqtgraph.parametertree.parameterTypes as pTypes
+from pyqtgraph.parametertree import Parameter, ParameterTree, ParameterItem, registerParameterType
+import pyqtgraph as pg
+pg.setConfigOptions(antialias=True)
+from pglive.sources.data_connector import DataConnector
+from pglive.kwargs import Axis
+from pglive.sources.live_plot import LiveLinePlot
+from pglive.sources.live_plot_widget import LivePlotWidget
+from pglive.sources.live_axis import LiveAxis
+import sys
+import argparse
+import logging
+import asyncio
+from pytec.aioclient import Client, StoppedConnecting
+import qasync
+from qasync import asyncSlot, asyncClose
+from autotune import PIDAutotune, PIDAutotuneState
+
+# pyuic6 -x tec_qt.ui  -o ui_tec_qt.py
+from ui_tec_qt import Ui_MainWindow
+
+"""Number of channels provided by the Thermostat"""
+NUM_CHANNELS: int = 2
+
+def get_argparser():
+    parser = argparse.ArgumentParser(description="ARTIQ master")
+
+    parser.add_argument("--connect", default=None, action="store_true",
+                        help="Automatically connect to the specified Thermostat in IP:port format")
+    parser.add_argument('IP', metavar="ip", default=None, nargs='?')
+    parser.add_argument('PORT', metavar="port", default=None, nargs='?')
+    parser.add_argument("-l", "--log", dest="logLevel", choices=['DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL'],
+                        help="Set the logging level")
+
+    return parser
+
+
+class MutexParameter(pTypes.ListParameter):
+    """
+    Mutually exclusive parameter where only one of its children is visible at a time, list selectable.
+
+    The ordering of the list items determines which children will be visible.
+    """
+    def __init__(self, **opts):
+        super().__init__(**opts)
+
+        self.sigValueChanged.connect(self.show_chosen_child)
+        self.sigValueChanged.emit(self, self.opts['value'])
+
+    def _get_param_from_value(self, value):
+        if isinstance(self.opts['limits'], dict):
+            values_list = list(self.opts['limits'].values())
+        else:
+            values_list = self.opts['limits']
+
+        return self.children()[values_list.index(value)]
+
+    @pyqtSlot(object, object)
+    def show_chosen_child(self, value):
+        for param in self.children():
+            param.hide()
+
+        child_to_show = self._get_param_from_value(value.value())
+        child_to_show.show()
+
+        if child_to_show.opts.get('triggerOnShow', None):
+            child_to_show.sigValueChanged.emit(child_to_show, child_to_show.value())
+
+
+registerParameterType('mutex', MutexParameter)
+
+
+class WrappedClient(QObject, Client):
+    connection_error = pyqtSignal()
+
+    async def _read_line(self):
+        try:
+            return await super()._read_line()
+        except (OSError, TimeoutError) as e:
+            logging.error("Client connection error, disconnecting", exc_info=True)
+            self.connection_error.emit()
+
+
+class ClientWatcher(QObject):
+    fan_update = pyqtSignal(dict)
+    pwm_update = pyqtSignal(list)
+    report_update = pyqtSignal(list)
+    pid_update = pyqtSignal(list)
+    thermistor_update = pyqtSignal(list)
+    postfilter_update = pyqtSignal(list)
+
+    def __init__(self, parent, client, update_s):
+        self._update_s = update_s
+        self._client = client
+        self._watch_task = None
+        self._report_mode_task = None
+        self._poll_for_report = True
+        super().__init__(parent)
+
+    async def run(self):
+        loop = asyncio.get_running_loop()
+        while True:
+            time = loop.time()
+            await self.update_params()
+            await asyncio.sleep(self._update_s - (loop.time() - time))
+
+    async def update_params(self):
+        self.fan_update.emit(await self._client.get_fan())
+        self.pwm_update.emit(await self._client.get_pwm())
+        if self._poll_for_report:
+            self.report_update.emit(await self._client.report())
+        self.pid_update.emit(await self._client.get_pid())
+        self.thermistor_update.emit(await self._client.get_steinhart_hart())
+        self.postfilter_update.emit(await self._client.get_postfilter())
+
+    def start_watching(self):
+        self._watch_task = asyncio.create_task(self.run())
+
+    @pyqtSlot()
+    def stop_watching(self):
+        if self._watch_task is not None:
+            self._watch_task.cancel()
+            self._watch_task = None
+
+    async def set_report_mode(self, enabled: bool):
+        self._poll_for_report = not enabled
+        if enabled:
+            self._report_mode_task = asyncio.create_task(self.report_mode())
+        else:
+            self._client.stop_report_mode()
+            if self._report_mode_task is not None:
+                await self._report_mode_task
+                self._report_mode_task = None
+
+    async def report_mode(self):
+        async for report in self._client.report_mode():
+            self.report_update.emit(report)
+
+    @pyqtSlot(float)
+    def set_update_s(self, update_s):
+        self._update_s = update_s
+
+
+class ChannelGraphs:
+    """Manager of a channel's two graphs and their elements."""
+
+    """The maximum number of sample points to store."""
+    DEFAULT_MAX_SAMPLES = 1000
+
+    def __init__(self, t_widget, i_widget):
+        self._t_widget = t_widget
+        self._i_widget = i_widget
+
+        self._t_plot = LiveLinePlot()
+        self._i_plot = LiveLinePlot(name="Measured")
+        self._iset_plot = LiveLinePlot(name="Set", pen=pg.mkPen('r'))
+
+        self._t_line = self._t_widget.getPlotItem().addLine(label='{value} °C')
+        self._t_line.setVisible(False)
+        self._t_setpoint_plot = LiveLinePlot() # Hack for keeping setpoint line in plot range
+
+        for graph in t_widget, i_widget:
+            time_axis = LiveAxis('bottom', text="Time since Thermostat reset", **{Axis.TICK_FORMAT: Axis.DURATION})
+            time_axis.showLabel()
+            graph.setAxisItems({'bottom': time_axis})
+
+            graph.add_crosshair(pg.mkPen(color='red', width=1), {'color': 'green'})
+
+            # Enable linking of axes in the graph widget's context menu
+            graph.register(graph.getPlotItem().titleLabel.text) # Slight hack getting the title
+
+        temperature_axis = LiveAxis('left', text="Temperature", units="°C")
+        temperature_axis.showLabel()
+        t_widget.setAxisItems({'left': temperature_axis})
+
+        current_axis = LiveAxis('left', text="Current", units="A")
+        current_axis.showLabel()
+        i_widget.setAxisItems({'left': current_axis})
+        i_widget.addLegend(brush=(50, 50, 200, 150))
+
+        t_widget.addItem(self._t_plot)
+        t_widget.addItem(self._t_setpoint_plot)
+        i_widget.addItem(self._i_plot)
+        i_widget.addItem(self._iset_plot)
+
+        self.t_connector = DataConnector(self._t_plot, max_points=self.DEFAULT_MAX_SAMPLES)
+        self.t_setpoint_connector = DataConnector(self._t_setpoint_plot, max_points=1)
+        self.i_connector = DataConnector(self._i_plot, max_points=self.DEFAULT_MAX_SAMPLES)
+        self.iset_connector = DataConnector(self._iset_plot, max_points=self.DEFAULT_MAX_SAMPLES)
+
+        self.max_samples = self.DEFAULT_MAX_SAMPLES
+
+    def plot_append(self, report):
+        temperature = report['temperature']
+        current = report['tec_i']
+        iset = report['i_set']
+        time = report['time']
+
+        if temperature is not None:
+            self.t_connector.cb_append_data_point(temperature, time)
+            if self._t_line.isVisible():
+                self.t_setpoint_connector.cb_append_data_point(self._t_line.value(), time)
+            else:
+                self.t_setpoint_connector.cb_append_data_point(temperature, time)
+            if current is not None:
+                self.i_connector.cb_append_data_point(current, time)
+            self.iset_connector.cb_append_data_point(iset, time)
+
+    def clear(self):
+        for connector in self.t_connector, self.i_connector, self.iset_connector:
+            connector.clear()
+
+    def set_t_line(self, temp=None, visible=None):
+        if visible is not None:
+            self._t_line.setVisible(visible)
+        if temp is not None:
+            self._t_line.setValue(temp)
+
+            # PyQtGraph normally does not update this text when the line
+            # is not visible, so make sure that the temperature label 
+            # gets updated always, and doesn't stay at an old value.
+            self._t_line.label.setText(f"{temp} °C")
+
+
+class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
+
+    """The maximum number of sample points to store."""
+    DEFAULT_MAX_SAMPLES = 1000
+
+    """Thermostat parameters that are particular to a channel"""
+    THERMOSTAT_PARAMETERS = [[
+        {'name': 'Temperature', 'type': 'float', 'format': '{value:.4f} °C', 'readonly': True},
+        {'name': 'Current through TEC', 'type': 'float', 'suffix': 'mA', 'decimals': 6, 'readonly': True},
+        {'name': 'Output Config', 'expanded': True, 'type': 'group', 'children': [
+            {'name': 'Control Method', 'type': 'mutex', 'limits': ['Constant Current', 'Temperature PID'],
+            'activaters': [None, ('pwm', ch, 'pid')], 'children': [
+                {'name': 'Set Current', 'type': 'float', 'value': 0, 'step': 100, 'limits': (-3000, 3000), 'triggerOnShow': True,
+                'decimals': 6, 'suffix': 'mA', 'param': ('pwm', ch, 'i_set')},
+                {'name': 'Set Temperature', 'type': 'float', 'value': 25, 'step': 0.1, 'limits': (-273, 300),
+                'format': '{value:.4f} °C', 'param': ('pid', ch, 'target')},
+            ]},
+            {'name': 'Limits', 'expanded': False, 'type': 'group', 'children': [
+                {'name': 'Max Cooling Current', 'type': 'float', 'value': 0, 'step': 100, 'decimals': 6, 'limits': (0, 3000),
+                'suffix': 'mA', 'param': ('pwm', ch, 'max_i_pos')},
+                {'name': 'Max Heating Current', 'type': 'float', 'value': 0, 'step': 100, 'decimals': 6, 'limits': (0, 3000),
+                'suffix': 'mA', 'param': ('pwm', ch, 'max_i_neg')},
+                {'name': 'Max Voltage Difference', 'type': 'float', 'value': 0, 'step': 0.1, 'limits': (0, 5), 'siPrefix': True,
+                'suffix': 'V', 'param': ('pwm', ch, 'max_v')},
+            ]}
+        ]},
+        {'name': 'Thermistor Config', 'expanded': False, 'type': 'group', 'children': [
+            {'name': 'T₀', 'type': 'float', 'value': 25, 'step': 0.1, 'limits': (-100, 100),
+            'format': '{value:.4f} °C', 'param': ('s-h', ch, 't0')},
+            {'name': 'R₀', 'type': 'float', 'value': 10000, 'step': 1, 'siPrefix': True, 'suffix': 'Ω',
+            'param': ('s-h', ch, 'r0')},
+            {'name': 'B', 'type': 'float', 'value': 3950, 'step': 1, 'suffix': 'K', 'decimals': 4, 'param': ('s-h', ch, 'b')},
+            {'name': 'Postfilter Rate', 'type': 'list', 'value': 16.67, 'param': ('postfilter', ch, 'rate'),
+            'limits': {'Off': None, '16.67 Hz': 16.67, '20 Hz': 20.0, '21.25 Hz': 21.25, '27 Hz': 27.0}},
+        ]},
+        {'name': 'PID Config', 'expanded': False, 'type': 'group', 'children': [
+            {'name': 'Kp', 'type': 'float', 'step': 0.1, 'suffix': '', 'param': ('pid', ch, 'kp')},
+            {'name': 'Ki', 'type': 'float', 'step': 0.1, 'suffix': 'Hz', 'param': ('pid', ch, 'ki')},
+            {'name': 'Kd', 'type': 'float', 'step': 0.1, 'suffix': 's', 'param': ('pid', ch, 'kd')},
+            {'name': "PID Output Clamping", 'expanded': True, 'type': 'group', 'children': [
+                {'name': 'Minimum', 'type': 'float', 'step': 100, 'limits': (-3000, 3000), 'decimals': 6, 'suffix': 'mA', 'param': ('pid', ch, 'output_min')},
+                {'name': 'Maximum', 'type': 'float', 'step': 100, 'limits': (-3000, 3000), 'decimals': 6, 'suffix': 'mA', 'param': ('pid', ch, 'output_max')},
+            ]},
+            {'name': 'PID Auto Tune', 'expanded': False, 'type': 'group', 'children': [
+                {'name': 'Target Temperature', 'type': 'float', 'value': 20, 'step': 0.1, 'format': '{value:.4f} °C'},
+                {'name': 'Test Current', 'type': 'float', 'value': 1000, 'decimals': 6, 'step': 100, 'limits': (-3000, 3000), 'suffix': 'mA'},
+                {'name': 'Temperature Swing', 'type': 'float', 'value': 1.5, 'step': 0.1, 'prefix': '±', 'format': '{value:.4f} °C'},
+                {'name': 'Run', 'type': 'action', 'tip': 'Run'},
+            ]},
+        ]},
+        {'name': 'Save to flash', 'type': 'action', 'tip': 'Save config to thermostat, applies on reset'},
+        {'name': 'Load from flash', 'type': 'action', 'tip': 'Load config from flash'}
+    ] for ch in range(NUM_CHANNELS)]
+
+    def __init__(self, args):
+        super().__init__()
+
+        self.setupUi(self)
+
+        self.ch0_t_graph.setTitle("Channel 0 Temperature")
+        self.ch0_i_graph.setTitle("Channel 0 Current")
+        self.ch1_t_graph.setTitle("Channel 1 Temperature")
+        self.ch1_i_graph.setTitle("Channel 1 Current")
+
+        self.max_samples = self.DEFAULT_MAX_SAMPLES
+
+        self._set_up_connection_menu()
+        self._set_up_thermostat_menu()
+        self._set_up_plot_menu()
+
+        self.client = WrappedClient(self)
+        self.client.connection_error.connect(self.bail)
+        self.client_watcher = ClientWatcher(self, self.client, self.report_refresh_spin.value())
+        self.client_watcher.fan_update.connect(self.fan_update)
+        self.client_watcher.report_update.connect(self.update_report)
+        self.client_watcher.pid_update.connect(self.update_pid)
+        self.client_watcher.pwm_update.connect(self.update_pwm)
+        self.client_watcher.thermistor_update.connect(self.update_thermistor)
+        self.client_watcher.postfilter_update.connect(self.update_postfilter)
+        self.report_apply_btn.clicked.connect(
+            lambda: self.client_watcher.set_update_s(self.report_refresh_spin.value())
+        )
+
+        self.params = [
+            Parameter.create(name=f"Thermostat Channel {ch} Parameters", type='group', value=ch, children=self.THERMOSTAT_PARAMETERS[ch])
+            for ch in range(NUM_CHANNELS)
+        ]
+        self._set_param_tree()
+
+        self.channel_graphs = [
+            ChannelGraphs(getattr(self, f'ch{ch}_t_graph'), getattr(self, f'ch{ch}_i_graph'))
+            for ch in range(NUM_CHANNELS)
+        ]
+
+        self.autotuners = [
+            PIDAutotune(25)
+            for _ in range(NUM_CHANNELS)
+        ]
+
+        self.loading_spinner.hide()
+
+        self.hw_rev_data = None
+
+        if args.connect:
+            if args.IP:
+                self.host_set_line.setText(args.IP)
+            if args.PORT:
+                self.port_set_spin.setValue(int(args.PORT))
+            self.connect_btn.click()
+
+    def _set_up_connection_menu(self):
+        self.connection_menu = QtWidgets.QMenu()
+        self.connection_menu.setTitle('Connection Settings')
+
+        self.host_set_line = QtWidgets.QLineEdit()
+        self.host_set_line.setMinimumSize(QtCore.QSize(160, 0))
+        self.host_set_line.setMaximumSize(QtCore.QSize(160, 16777215))
+        self.host_set_line.setMaxLength(15)
+        self.host_set_line.setClearButtonEnabled(True)
+
+        def connect_on_enter_press():
+            self.connect_btn.click()
+            self.connection_menu.hide()
+        self.host_set_line.returnPressed.connect(connect_on_enter_press)
+
+        self.host_set_line.setText("192.168.1.26")
+        self.host_set_line.setPlaceholderText("IP for the Thermostat")
+
+        host = QtWidgets.QWidgetAction(self.connection_menu)
+        host.setDefaultWidget(self.host_set_line)
+        self.connection_menu.addAction(host)
+        self.connection_menu.host = host
+
+        self.port_set_spin = QtWidgets.QSpinBox()
+        self.port_set_spin.setMinimumSize(QtCore.QSize(70, 0))
+        self.port_set_spin.setMaximumSize(QtCore.QSize(70, 16777215))
+        self.port_set_spin.setMaximum(65535)
+        self.port_set_spin.setValue(23)
+
+        def connect_only_if_enter_pressed():
+            if not self.port_set_spin.hasFocus(): # Don't connect if the spinbox only lost focus
+                return;
+            connect_on_enter_press()
+        self.port_set_spin.editingFinished.connect(connect_only_if_enter_pressed)
+
+        port = QtWidgets.QWidgetAction(self.connection_menu)
+        port.setDefaultWidget(self.port_set_spin)
+        self.connection_menu.addAction(port)
+        self.connection_menu.port = port
+
+        self.exit_button = QtWidgets.QPushButton()
+        self.exit_button.setText("Exit GUI")
+        self.exit_button.pressed.connect(QtWidgets.QApplication.instance().quit)
+
+        exit_action = QtWidgets.QWidgetAction(self.exit_button)
+        exit_action.setDefaultWidget(self.exit_button)
+        self.connection_menu.addAction(exit_action)
+        self.connection_menu.exit_action = exit_action
+
+        self.connect_btn.setMenu(self.connection_menu)
+
+    def _set_up_thermostat_menu(self):
+        self.thermostat_menu = QtWidgets.QMenu()
+        self.thermostat_menu.setTitle('Thermostat settings')
+
+        self.fan_group = QtWidgets.QWidget()
+        self.fan_group.setEnabled(False)
+        self.fan_group.setMinimumSize(QtCore.QSize(40, 0))
+        self.fan_layout = QtWidgets.QHBoxLayout(self.fan_group)
+        self.fan_layout.setSpacing(9)
+        self.fan_lbl = QtWidgets.QLabel(parent=self.fan_group)
+        self.fan_lbl.setMinimumSize(QtCore.QSize(40, 0))
+        self.fan_lbl.setMaximumSize(QtCore.QSize(40, 16777215))
+        self.fan_lbl.setBaseSize(QtCore.QSize(40, 0))
+        self.fan_layout.addWidget(self.fan_lbl)
+        self.fan_power_slider = QtWidgets.QSlider(parent=self.fan_group)
+        self.fan_power_slider.setMinimumSize(QtCore.QSize(200, 0))
+        self.fan_power_slider.setMaximumSize(QtCore.QSize(200, 16777215))
+        self.fan_power_slider.setBaseSize(QtCore.QSize(200, 0))
+        self.fan_power_slider.setRange(1, 100)
+        self.fan_power_slider.setOrientation(QtCore.Qt.Orientation.Horizontal)
+        self.fan_layout.addWidget(self.fan_power_slider)
+        self.fan_auto_box = QtWidgets.QCheckBox(parent=self.fan_group)
+        self.fan_auto_box.setMinimumSize(QtCore.QSize(70, 0))
+        self.fan_auto_box.setMaximumSize(QtCore.QSize(70, 16777215))
+        self.fan_layout.addWidget(self.fan_auto_box)
+        self.fan_pwm_warning = QtWidgets.QLabel(parent=self.fan_group)
+        self.fan_pwm_warning.setMinimumSize(QtCore.QSize(16, 0))
+        self.fan_layout.addWidget(self.fan_pwm_warning)
+
+        self.fan_power_slider.valueChanged.connect(self.fan_set)
+        self.fan_auto_box.stateChanged.connect(self.fan_auto_set)
+
+        self.fan_lbl.setToolTip("Adjust the fan")
+        self.fan_lbl.setText("Fan:")
+        self.fan_auto_box.setText("Auto")
+
+        fan = QtWidgets.QWidgetAction(self.thermostat_menu)
+        fan.setDefaultWidget(self.fan_group)
+        self.thermostat_menu.addAction(fan)
+        self.thermostat_menu.fan = fan
+
+        @asyncSlot(bool)
+        async def reset_thermostat(_):
+            await self._on_connection_changed(False)
+            await self.client.reset()
+            await asyncio.sleep(0.1) # Wait for the reset to start
+
+            self.connect_btn.click() # Reconnect
+
+        self.actionReset.triggered.connect(reset_thermostat)
+        self.thermostat_menu.addAction(self.actionReset)
+
+        @asyncSlot(bool)
+        async def dfu_mode(_):
+            await self._on_connection_changed(False)
+            await self.client.dfu()
+
+            # TODO: add a firmware flashing GUI?
+
+        self.actionEnter_DFU_Mode.triggered.connect(dfu_mode)
+        self.thermostat_menu.addAction(self.actionEnter_DFU_Mode)
+
+        @asyncSlot(bool)
+        async def network_settings(_):
+            ask_network = QtWidgets.QInputDialog(self)
+            ask_network.setWindowTitle("Network Settings")
+            ask_network.setLabelText("Set the Thermostat's IPv4 address, netmask and gateway (optional)")
+            ask_network.setTextValue((await self.client.ipv4())['addr'])
+
+            @pyqtSlot(str)
+            def set_ipv4(ipv4_settings):
+                sure = QtWidgets.QMessageBox(self)
+                sure.setWindowTitle("Set network?")
+                sure.setText(f"Setting this as network and disconnecting:<br>{ipv4_settings}")
+
+                @asyncSlot(object)
+                async def really_set(button):
+                    await self.client.set_param("ipv4", ipv4_settings)
+                    await self.client.disconnect()
+
+                    await self._on_connection_changed(False)
+
+                sure.buttonClicked.connect(really_set)
+                sure.show()
+            ask_network.textValueSelected.connect(set_ipv4)
+            ask_network.show()
+
+        self.actionNetwork_Settings.triggered.connect(network_settings)
+        self.thermostat_menu.addAction(self.actionNetwork_Settings)
+
+        @asyncSlot(bool)
+        async def load(_):
+            await self.client.load_config()
+            loaded = QtWidgets.QMessageBox(self)
+            loaded.setWindowTitle("Config loaded")
+            loaded.setText(f"All channel configs have been loaded from flash.")
+            loaded.setIcon(QtWidgets.QMessageBox.Icon.Information)
+            loaded.show()
+
+        self.actionLoad_all_configs.triggered.connect(load)
+        self.thermostat_menu.addAction(self.actionLoad_all_configs)
+
+        @asyncSlot(bool)
+        async def save(_):
+            await self.client.save_config()
+            saved = QtWidgets.QMessageBox(self)
+            saved.setWindowTitle("Config saved")
+            saved.setText(f"All channel configs have been saved to flash.")
+            saved.setIcon(QtWidgets.QMessageBox.Icon.Information)
+            saved.show()
+
+        self.actionSave_all_configs.triggered.connect(save)
+        self.thermostat_menu.addAction(self.actionSave_all_configs)
+
+        def about_thermostat():
+            QtWidgets.QMessageBox.about(
+                self,
+                "About Thermostat",
+                f"""
+                <h1>Sinara 8451 Thermostat v{self.hw_rev_data['rev']['major']}.{self.hw_rev_data['rev']['minor']}</h1>
+
+                <br>
+
+                <h2>Settings:</h2>
+                Default fan curve:
+                    a = {self.hw_rev_data['settings']['fan_k_a']},
+                    b = {self.hw_rev_data['settings']['fan_k_b']},
+                    c = {self.hw_rev_data['settings']['fan_k_c']}
+                <br>
+                Fan PWM range: 
+                    {self.hw_rev_data['settings']['min_fan_pwm']} \u2013 {self.hw_rev_data['settings']['max_fan_pwm']}
+                <br>
+                Fan PWM frequency: {self.hw_rev_data['settings']['fan_pwm_freq_hz']} Hz
+                <br>
+                Fan available: {self.hw_rev_data['settings']['fan_available']}
+                <br>
+                Fan PWM recommended: {self.hw_rev_data['settings']['fan_pwm_recommended']}
+                """
+            )
+
+        self.actionAbout_Thermostat.triggered.connect(about_thermostat)
+        self.thermostat_menu.addAction(self.actionAbout_Thermostat)
+
+        self.thermostat_settings.setMenu(self.thermostat_menu)
+
+    def _set_up_plot_menu(self):
+        self.plot_menu = QtWidgets.QMenu()
+        self.plot_menu.setTitle("Plot Settings")
+
+        clear = QtGui.QAction("Clear graphs", self.plot_menu)
+        clear.triggered.connect(self.clear_graphs)
+        self.plot_menu.addAction(clear)
+        self.plot_menu.clear = clear
+
+        self.samples_spinbox = QtWidgets.QSpinBox()
+        self.samples_spinbox.setRange(2, 100000)
+        self.samples_spinbox.setSuffix(' samples')
+        self.samples_spinbox.setValue(self.max_samples)
+        self.samples_spinbox.valueChanged.connect(self.set_max_samples)
+
+        limit_samples = QtWidgets.QWidgetAction(self.plot_menu)
+        limit_samples.setDefaultWidget(self.samples_spinbox)
+        self.plot_menu.addAction(limit_samples)
+        self.plot_menu.limit_samples = limit_samples
+
+        self.plot_settings.setMenu(self.plot_menu)
+
+    @pyqtSlot(list)
+    def set_limits_warning(self, channels_zeroed_limits: list):
+        channel_disabled = [False, False]
+
+        report_str = "The following output limit(s) are set to zero:\n"
+        for ch, zeroed_limits in enumerate(channels_zeroed_limits):
+            if {'max_i_pos', 'max_i_neg'}.issubset(zeroed_limits):
+                report_str += "Max Cooling Current, Max Heating Current"
+                channel_disabled[ch] = True
+
+            if 'max_v' in zeroed_limits:
+                if channel_disabled[ch]:
+                    report_str += ", "
+                report_str += "Max Voltage Difference"
+                channel_disabled[ch] = True
+
+            if channel_disabled[ch]:
+                report_str += f" for Channel {ch}\n"
+
+        report_str += "\nThese limit(s) are restricting the channel(s) from producing current."
+
+        if True in channel_disabled:
+            pixmapi = getattr(QtWidgets.QStyle.StandardPixmap, "SP_MessageBoxWarning")
+            icon = self.style().standardIcon(pixmapi)
+            self.limits_warning.setPixmap(icon.pixmap(16, 16))
+            self.limits_warning.setToolTip(report_str)
+        else:
+            self.limits_warning.setPixmap(QtGui.QPixmap())
+            self.limits_warning.setToolTip(None)
+
+    @pyqtSlot(int)
+    def set_max_samples(self, samples: int):
+        for channel_graph in self.channel_graphs:
+            channel_graph.t_connector.max_points = samples
+            channel_graph.i_connector.max_points = samples
+            channel_graph.iset_connector.max_points = samples
+
+    def clear_graphs(self):
+        for channel_graph in self.channel_graphs:
+            channel_graph.clear()
+
+    async def _on_connection_changed(self, result):
+        self.graph_group.setEnabled(result)
+        self.report_group.setEnabled(result)
+        self.thermostat_settings.setEnabled(result)
+
+        self.host_set_line.setEnabled(not result)
+        self.port_set_spin.setEnabled(not result)
+        self.connect_btn.setText("Disconnect" if result else "Connect")
+        if result:
+            self.hw_rev_data = await self.client.hw_rev()
+            self._status(self.hw_rev_data)
+            self.client_watcher.start_watching()
+            # await self.client.set_param("fan", 1)
+        else:
+            self.status_lbl.setText("Disconnected")
+            self.fan_pwm_warning.setPixmap(QtGui.QPixmap())
+            self.fan_pwm_warning.setToolTip("")
+            self.clear_graphs()
+            self.report_box.setChecked(False)
+            await self.client_watcher.set_report_mode(False)
+            self.client_watcher.stop_watching()
+            self.status_lbl.setText("Disconnected")
+
+    def _set_fan_pwm_warning(self):
+        if self.fan_power_slider.value() != 100:
+            pixmapi = getattr(QtWidgets.QStyle.StandardPixmap, "SP_MessageBoxWarning")
+            icon = self.style().standardIcon(pixmapi)
+            self.fan_pwm_warning.setPixmap(icon.pixmap(16, 16))
+            self.fan_pwm_warning.setToolTip("Throttling the fan (not recommended on this hardware rev)")
+        else:
+            self.fan_pwm_warning.setPixmap(QtGui.QPixmap())
+            self.fan_pwm_warning.setToolTip("")
+
+    def _status(self, hw_rev_d: dict):
+        logging.debug(hw_rev_d)
+        self.status_lbl.setText(f"Connected to Thermostat v{hw_rev_d['rev']['major']}.{hw_rev_d['rev']['minor']}")
+        self.fan_group.setEnabled(hw_rev_d["settings"]["fan_available"])
+
+    @pyqtSlot(dict)
+    def fan_update(self, fan_settings: dict):
+        logging.debug(fan_settings)
+        if fan_settings is None:
+            return
+        with QSignalBlocker(self.fan_power_slider):
+            self.fan_power_slider.setValue(fan_settings["fan_pwm"] or 100) # 0 = PWM off = full strength
+        with QSignalBlocker(self.fan_auto_box):
+            self.fan_auto_box.setChecked(fan_settings["auto_mode"])
+        if not self.hw_rev_data["settings"]["fan_pwm_recommended"]:
+            self._set_fan_pwm_warning()
+
+    @asyncSlot(int)
+    async def fan_set(self, value):
+        if not self.client.connected():
+            return
+        if self.fan_auto_box.isChecked():
+            with QSignalBlocker(self.fan_auto_box):
+                self.fan_auto_box.setChecked(False)
+        await self.client.set_fan(value)
+        if not self.hw_rev_data["settings"]["fan_pwm_recommended"]:
+            self._set_fan_pwm_warning()
+
+    @asyncSlot(int)
+    async def fan_auto_set(self, enabled):
+        if not self.client.connected():
+            return
+        if enabled:
+            await self.client.set_fan("auto")
+            self.fan_update(await self.client.get_fan())
+        else:
+            await self.client.set_fan(self.fan_power_slider.value())
+
+    @asyncSlot(int)
+    async def on_report_box_stateChanged(self, enabled):
+        await self.client_watcher.set_report_mode(enabled)
+
+    @asyncClose
+    async def closeEvent(self, event):
+        await self.bail()
+
+    @asyncSlot()
+    async def on_connect_btn_clicked(self):
+        host, port = self.host_set_line.text(), self.port_set_spin.value()
+        try:
+            if not (self.client.connecting() or self.client.connected()):
+                self.status_lbl.setText("Connecting...")
+                self.connect_btn.setText("Stop")
+                self.host_set_line.setEnabled(False)
+                self.port_set_spin.setEnabled(False)
+
+                try:
+                    await self.client.start_session(host=host, port=port, timeout=30)
+                except StoppedConnecting:
+                    return
+                await self._on_connection_changed(True)
+            else:
+                await self.bail()
+
+        except (OSError, TimeoutError) as e:
+            logging.error(f"Failed communicating to {host}:{port}: {e}")
+            await self.bail()
+
+    @asyncSlot()
+    async def bail(self):
+        await self._on_connection_changed(False)
+        await self.client.end_session()
+
+    @asyncSlot(object, object)
+    async def send_command(self, param, changes):
+        """Translates parameter tree changes into thermostat set_param calls"""
+
+        for inner_param, change, data in changes:
+            if change == 'value':
+                if inner_param.opts.get("param", None) is not None:
+                    if 'Current' in inner_param.name():
+                        data /= 1000 # Given in mA
+
+                    thermostat_param = inner_param.opts["param"]
+                    if inner_param.name() == 'Postfilter Rate' and data == None:
+                        set_param_args = (*thermostat_param[:2], 'off')
+                    else:
+                        set_param_args = (*thermostat_param, data)
+                    await self.client.set_param(*set_param_args)
+                if inner_param.opts.get('activaters', None) is not None:
+                    activater = inner_param.opts['activaters'][inner_param.opts['limits'].index(data)]
+                    if activater is not None:
+                        await self.client.set_param(*activater)
+
+
+    def _set_param_tree(self):
+        for i, tree in enumerate((self.ch0_tree, self.ch1_tree)):
+            tree.setHeaderHidden(True)
+            tree.setParameters(self.params[i], showTop=False)
+            self.params[i].sigTreeStateChanged.connect(self.send_command)
+
+            @asyncSlot()
+            async def save(_, ch=i):
+                await self.client.save_config(ch)
+                saved = QtWidgets.QMessageBox(self)
+                saved.setWindowTitle("Config saved")
+                saved.setText(f"Channel {ch} Config has been saved to flash.")
+                saved.setIcon(QtWidgets.QMessageBox.Icon.Information)
+                saved.show()
+
+            self.params[i].child('Save to flash').sigActivated.connect(save)
+
+            @asyncSlot()
+            async def load(_, ch=i):
+                await self.client.load_config(ch)
+                loaded = QtWidgets.QMessageBox(self)
+                loaded.setWindowTitle("Config loaded")
+                loaded.setText(f"Channel {ch} Config has been loaded from flash.")
+                loaded.setIcon(QtWidgets.QMessageBox.Icon.Information)
+                loaded.show()
+
+            self.params[i].child('Load from flash').sigActivated.connect(load)
+
+            @asyncSlot()
+            async def autotune(param, ch=i):
+                match self.autotuners[ch].state():
+                    case PIDAutotuneState.STATE_OFF:
+                        self.autotuners[ch].setParam(
+                            param.parent().child('Target Temperature').value(),
+                            param.parent().child('Test Current').value() / 1000,
+                            param.parent().child('Temperature Swing').value(),
+                            self.report_refresh_spin.value(),
+                            3)
+                        self.autotuners[ch].setReady()
+                        param.setOpts(title="Stop")
+                        self.client_watcher.report_update.connect(self.autotune_tick)
+                        self.loading_spinner.show()
+                        self.loading_spinner.start()
+                        if self.autotuners[1 - ch].state() == PIDAutotuneState.STATE_OFF:
+                            self.background_task_lbl.setText("Autotuning channel {ch}...".format(ch=ch))
+                        else:
+                            self.background_task_lbl.setText("Autotuning channel 0 and 1...")
+                    case PIDAutotuneState.STATE_READY | PIDAutotuneState.STATE_RELAY_STEP_UP | PIDAutotuneState.STATE_RELAY_STEP_DOWN:
+                        self.autotuners[ch].setOff()
+                        param.setOpts(title="Run")
+                        await self.client.set_param('pwm', ch, 'i_set', 0)
+                        self.client_watcher.report_update.disconnect(self.autotune_tick)
+                        if self.autotuners[1 - ch].state() == PIDAutotuneState.STATE_OFF:
+                            self.background_task_lbl.setText("Ready.")
+                            self.loading_spinner.stop()
+                            self.loading_spinner.hide()
+                        else:
+                            self.background_task_lbl.setText("Autotuning channel {ch}...".format(ch=1-ch))
+
+            self.params[i].child('PID Config', 'PID Auto Tune', 'Run').sigActivated.connect(autotune)
+
+    @asyncSlot(list)
+    async def autotune_tick(self, report):
+        for channel_report in report:
+            channel = channel_report['channel']
+            match self.autotuners[channel].state():
+                case PIDAutotuneState.STATE_READY | PIDAutotuneState.STATE_RELAY_STEP_UP | PIDAutotuneState.STATE_RELAY_STEP_DOWN:
+                    self.autotuners[channel].run(channel_report['temperature'], channel_report['time'])
+                    await self.client.set_param('pwm', channel, 'i_set', self.autotuners[channel].output())
+                case PIDAutotuneState.STATE_SUCCEEDED:
+                    kp, ki, kd = self.autotuners[channel].get_tec_pid()
+                    self.autotuners[channel].setOff()
+                    self.params[channel].child('PID Config', 'PID Auto Tune', 'Run').setOpts(title="Run")
+                    await self.client.set_param('pid', channel, 'kp', kp)
+                    await self.client.set_param('pid', channel, 'ki', ki)
+                    await self.client.set_param('pid', channel, 'kd', kd)
+                    await self.client.set_param('pwm', channel, 'pid')
+                    await self.client.set_param('pid', channel, 'target', self.params[channel].child("PID Config", "PID Auto Tune", "Target Temperature").value())
+                    self.client_watcher.report_update.disconnect(self.autotune_tick)
+                    if self.autotuners[1 - channel].state() == PIDAutotuneState.STATE_OFF:
+                        self.background_task_lbl.setText("Ready.")
+                        self.loading_spinner.stop()
+                        self.loading_spinner.hide()
+                    else:
+                        self.background_task_lbl.setText("Autotuning channel {ch}...".format(ch=1-ch))
+                case PIDAutotuneState.STATE_FAILED:
+                    self.autotuners[channel].setOff()
+                    self.params[channel].child('PID Config', 'PID Auto Tune', 'Run').setOpts(title="Run")
+                    await self.client.set_param('pwm', channel, 'i_set', 0)
+                    self.client_watcher.report_update.disconnect(self.autotune_tick)
+                    if self.autotuners[1 - channel].state() == PIDAutotuneState.STATE_OFF:
+                        self.background_task_lbl.setText("Ready.")
+                        self.loading_spinner.stop()
+                        self.loading_spinner.hide()
+                    else:
+                        self.background_task_lbl.setText("Autotuning channel {ch}...".format(ch=1-ch))
+
+    @pyqtSlot(list)
+    def update_pid(self, pid_settings):
+        for settings in pid_settings:
+            channel = settings["channel"]
+            with QSignalBlocker(self.params[channel]):
+                self.params[channel].child("PID Config", "Kp").setValue(settings["parameters"]["kp"])
+                self.params[channel].child("PID Config", "Ki").setValue(settings["parameters"]["ki"])
+                self.params[channel].child("PID Config", "Kd").setValue(settings["parameters"]["kd"])
+                self.params[channel].child("PID Config", "PID Output Clamping", "Minimum").setValue(settings["parameters"]["output_min"] * 1000)
+                self.params[channel].child("PID Config", "PID Output Clamping", "Maximum").setValue(settings["parameters"]["output_max"] * 1000)
+                self.params[channel].child("Output Config", "Control Method", "Set Temperature").setValue(settings["target"])
+                self.channel_graphs[channel].set_t_line(temp=round(settings["target"], 6))
+
+    @pyqtSlot(list)
+    def update_report(self, report_data):
+        for settings in report_data:
+            channel = settings["channel"]
+            self.channel_graphs[channel].plot_append(settings)
+            with QSignalBlocker(self.params[channel]):
+                self.params[channel].child("Output Config", "Control Method").setValue("Temperature PID" if settings["pid_engaged"] else "Constant Current")
+                self.channel_graphs[channel].set_t_line(visible=settings['pid_engaged'])
+                self.params[channel].child("Output Config", "Control Method", "Set Current").setValue(settings["i_set"] * 1000)
+                if settings['temperature'] is not None:
+                    self.params[channel].child("Temperature").setValue(settings['temperature'])
+                if settings['tec_i'] is not None:
+                    self.params[channel].child("Current through TEC").setValue(settings['tec_i'] * 1000)
+
+    @pyqtSlot(list)
+    def update_thermistor(self, sh_data):
+        for sh_param in sh_data:
+            channel = sh_param["channel"]
+            with QSignalBlocker(self.params[channel]):
+                self.params[channel].child("Thermistor Config", "T₀").setValue(sh_param["params"]["t0"] - 273.15)
+                self.params[channel].child("Thermistor Config", "R₀").setValue(sh_param["params"]["r0"])
+                self.params[channel].child("Thermistor Config", "B").setValue(sh_param["params"]["b"])
+
+    @pyqtSlot(list)
+    def update_pwm(self, pwm_data):
+        channels_zeroed_limits = [set() for i in range(NUM_CHANNELS)]
+
+        for pwm_params in pwm_data:
+            channel = pwm_params["channel"]
+            with QSignalBlocker(self.params[channel]):
+                self.params[channel].child("Output Config", "Limits", "Max Voltage Difference").setValue(pwm_params["max_v"]["value"])
+                self.params[channel].child("Output Config", "Limits", "Max Cooling Current").setValue(pwm_params["max_i_pos"]["value"] * 1000)
+                self.params[channel].child("Output Config", "Limits", "Max Heating Current").setValue(pwm_params["max_i_neg"]["value"] * 1000)
+
+            for limit in "max_i_pos", "max_i_neg", "max_v":
+                if pwm_params[limit]["value"] == 0.0:
+                    channels_zeroed_limits[channel].add(limit)
+
+        self.set_limits_warning(channels_zeroed_limits)
+
+    @pyqtSlot(list)
+    def update_postfilter(self, postfilter_data):
+        for postfilter_params in postfilter_data:
+            channel = postfilter_params["channel"]
+            with QSignalBlocker(self.params[channel]):
+                self.params[channel].child("Thermistor Config", "Postfilter Rate").setValue(postfilter_params["rate"])
+
+
+async def coro_main():
+    args = get_argparser().parse_args()
+    if args.logLevel:
+        logging.basicConfig(level=getattr(logging, args.logLevel))
+
+    app_quit_event = asyncio.Event()
+
+    app = QtWidgets.QApplication.instance()
+    app.aboutToQuit.connect(app_quit_event.set)
+
+    main_window = MainWindow(args)
+    main_window.show()
+
+    await app_quit_event.wait()
+
+
+def main():
+    qasync.run(coro_main())
+
+
+if __name__ == '__main__':
+    main()

pytec/tec_qt.ui

@@ -0,0 +1,544 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>1280</width>
+    <height>720</height>
+   </rect>
+  </property>
+  <property name="minimumSize">
+   <size>
+    <width>1280</width>
+    <height>720</height>
+   </size>
+  </property>
+  <property name="maximumSize">
+   <size>
+    <width>3840</width>
+    <height>2160</height>
+   </size>
+  </property>
+  <property name="windowTitle">
+   <string>Thermostat Control Panel</string>
+  </property>
+  <property name="windowIcon">
+   <iconset>
+    <normaloff>thermostat-icon-640x640.png</normaloff>thermostat-icon-640x640.png</iconset>
+  </property>
+  <widget class="QWidget" name="main_widget">
+   <property name="sizePolicy">
+    <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+     <horstretch>1</horstretch>
+     <verstretch>1</verstretch>
+    </sizepolicy>
+   </property>
+   <layout class="QGridLayout" name="gridLayout_2">
+    <property name="leftMargin">
+     <number>3</number>
+    </property>
+    <property name="topMargin">
+     <number>3</number>
+    </property>
+    <property name="rightMargin">
+     <number>3</number>
+    </property>
+    <property name="bottomMargin">
+     <number>3</number>
+    </property>
+    <property name="spacing">
+     <number>3</number>
+    </property>
+    <item row="0" column="1">
+     <layout class="QVBoxLayout" name="main_layout">
+      <property name="spacing">
+       <number>0</number>
+      </property>
+      <item>
+       <widget class="QFrame" name="graph_group">
+        <property name="enabled">
+         <bool>false</bool>
+        </property>
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+          <horstretch>1</horstretch>
+          <verstretch>1</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="frameShape">
+         <enum>QFrame::StyledPanel</enum>
+        </property>
+        <property name="frameShadow">
+         <enum>QFrame::Raised</enum>
+        </property>
+        <layout class="QGridLayout" name="graphs_layout" rowstretch="1,1" columnstretch="1,1,1" rowminimumheight="100,100" columnminimumwidth="100,100,100">
+         <property name="sizeConstraint">
+          <enum>QLayout::SetDefaultConstraint</enum>
+         </property>
+         <property name="leftMargin">
+          <number>3</number>
+         </property>
+         <property name="topMargin">
+          <number>3</number>
+         </property>
+         <property name="rightMargin">
+          <number>3</number>
+         </property>
+         <property name="bottomMargin">
+          <number>3</number>
+         </property>
+         <property name="spacing">
+          <number>2</number>
+         </property>
+         <item row="1" column="0">
+          <widget class="ParameterTree" name="ch1_tree" native="true"/>
+         </item>
+         <item row="0" column="0">
+          <widget class="ParameterTree" name="ch0_tree" native="true"/>
+         </item>
+         <item row="1" column="1">
+          <widget class="LivePlotWidget" name="ch1_t_graph" native="true"/>
+         </item>
+         <item row="0" column="1">
+          <widget class="LivePlotWidget" name="ch0_t_graph" native="true"/>
+         </item>
+         <item row="0" column="2">
+          <widget class="LivePlotWidget" name="ch0_i_graph" native="true"/>
+         </item>
+         <item row="1" column="2">
+          <widget class="LivePlotWidget" name="ch1_i_graph" native="true"/>
+         </item>
+        </layout>
+       </widget>
+      </item>
+      <item>
+       <widget class="QFrame" name="bottom_settings_group">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>40</height>
+         </size>
+        </property>
+        <property name="maximumSize">
+         <size>
+          <width>16777215</width>
+          <height>40</height>
+         </size>
+        </property>
+        <property name="frameShape">
+         <enum>QFrame::StyledPanel</enum>
+        </property>
+        <property name="frameShadow">
+         <enum>QFrame::Raised</enum>
+        </property>
+        <layout class="QHBoxLayout" name="horizontalLayout_2">
+         <property name="spacing">
+          <number>3</number>
+         </property>
+         <property name="leftMargin">
+          <number>3</number>
+         </property>
+         <property name="topMargin">
+          <number>3</number>
+         </property>
+         <property name="rightMargin">
+          <number>3</number>
+         </property>
+         <property name="bottomMargin">
+          <number>3</number>
+         </property>
+         <item>
+          <layout class="QHBoxLayout" name="settings_layout">
+           <item>
+            <widget class="QToolButton" name="connect_btn">
+             <property name="sizePolicy">
+              <sizepolicy hsizetype="Fixed" vsizetype="Expanding">
+               <horstretch>0</horstretch>
+               <verstretch>0</verstretch>
+              </sizepolicy>
+             </property>
+             <property name="minimumSize">
+              <size>
+               <width>100</width>
+               <height>0</height>
+              </size>
+             </property>
+             <property name="maximumSize">
+              <size>
+               <width>100</width>
+               <height>16777215</height>
+              </size>
+             </property>
+             <property name="baseSize">
+              <size>
+               <width>100</width>
+               <height>0</height>
+              </size>
+             </property>
+             <property name="text">
+              <string>Connect</string>
+             </property>
+             <property name="popupMode">
+              <enum>QToolButton::MenuButtonPopup</enum>
+             </property>
+             <property name="toolButtonStyle">
+              <enum>Qt::ToolButtonFollowStyle</enum>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QLabel" name="status_lbl">
+             <property name="sizePolicy">
+              <sizepolicy hsizetype="Fixed" vsizetype="Expanding">
+               <horstretch>0</horstretch>
+               <verstretch>0</verstretch>
+              </sizepolicy>
+             </property>
+             <property name="minimumSize">
+              <size>
+               <width>240</width>
+               <height>0</height>
+              </size>
+             </property>
+             <property name="maximumSize">
+              <size>
+               <width>120</width>
+               <height>16777215</height>
+              </size>
+             </property>
+             <property name="baseSize">
+              <size>
+               <width>120</width>
+               <height>50</height>
+              </size>
+             </property>
+             <property name="text">
+              <string>Disconnected</string>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QToolButton" name="thermostat_settings">
+             <property name="enabled">
+              <bool>false</bool>
+             </property>
+             <property name="text">
+              <string notr="true">⚙</string>
+             </property>
+             <property name="popupMode">
+              <enum>QToolButton::InstantPopup</enum>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QToolButton" name="plot_settings">
+             <property name="toolTip">
+              <string>Plot Settings</string>
+             </property>
+             <property name="text">
+              <string>📉</string>
+             </property>
+             <property name="popupMode">
+              <enum>QToolButton::InstantPopup</enum>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QLabel" name="limits_warning">
+             <property name="toolTipDuration">
+              <number>1000000000</number>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QLabel" name="background_task_lbl">
+             <property name="text">
+              <string>Ready.</string>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QtWaitingSpinner" name="loading_spinner" native="true"/>
+           </item>
+           <item>
+            <spacer name="horizontalSpacer">
+             <property name="orientation">
+              <enum>Qt::Horizontal</enum>
+             </property>
+             <property name="sizeHint" stdset="0">
+              <size>
+               <width>40</width>
+               <height>20</height>
+              </size>
+             </property>
+            </spacer>
+           </item>
+           <item>
+            <widget class="QWidget" name="report_group" native="true">
+             <property name="enabled">
+              <bool>false</bool>
+             </property>
+             <property name="sizePolicy">
+              <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
+               <horstretch>0</horstretch>
+               <verstretch>0</verstretch>
+              </sizepolicy>
+             </property>
+             <property name="minimumSize">
+              <size>
+               <width>40</width>
+               <height>0</height>
+              </size>
+             </property>
+             <layout class="QHBoxLayout" name="horizontalLayout_4">
+              <property name="spacing">
+               <number>0</number>
+              </property>
+              <property name="leftMargin">
+               <number>0</number>
+              </property>
+              <property name="topMargin">
+               <number>0</number>
+              </property>
+              <property name="rightMargin">
+               <number>0</number>
+              </property>
+              <property name="bottomMargin">
+               <number>0</number>
+              </property>
+              <item>
+               <layout class="QHBoxLayout" name="report_layout" stretch="0,1,1,1">
+                <property name="spacing">
+                 <number>6</number>
+                </property>
+                <property name="sizeConstraint">
+                 <enum>QLayout::SetDefaultConstraint</enum>
+                </property>
+                <property name="leftMargin">
+                 <number>0</number>
+                </property>
+                <item>
+                 <widget class="QLabel" name="report_lbl">
+                  <property name="text">
+                   <string>Poll every: </string>
+                  </property>
+                  <property name="alignment">
+                   <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+                  </property>
+                 </widget>
+                </item>
+                <item>
+                 <widget class="QDoubleSpinBox" name="report_refresh_spin">
+                  <property name="sizePolicy">
+                   <sizepolicy hsizetype="Fixed" vsizetype="Expanding">
+                    <horstretch>0</horstretch>
+                    <verstretch>0</verstretch>
+                   </sizepolicy>
+                  </property>
+                  <property name="minimumSize">
+                   <size>
+                    <width>70</width>
+                    <height>0</height>
+                   </size>
+                  </property>
+                  <property name="maximumSize">
+                   <size>
+                    <width>70</width>
+                    <height>16777215</height>
+                   </size>
+                  </property>
+                  <property name="baseSize">
+                   <size>
+                    <width>70</width>
+                    <height>0</height>
+                   </size>
+                  </property>
+                  <property name="suffix">
+                   <string> s</string>
+                  </property>
+                  <property name="decimals">
+                   <number>1</number>
+                  </property>
+                  <property name="minimum">
+                   <double>0.100000000000000</double>
+                  </property>
+                  <property name="singleStep">
+                   <double>0.100000000000000</double>
+                  </property>
+                  <property name="stepType">
+                   <enum>QAbstractSpinBox::AdaptiveDecimalStepType</enum>
+                  </property>
+                  <property name="value">
+                   <double>1.000000000000000</double>
+                  </property>
+                 </widget>
+                </item>
+                <item>
+                 <widget class="QCheckBox" name="report_box">
+                  <property name="sizePolicy">
+                   <sizepolicy hsizetype="Fixed" vsizetype="Expanding">
+                    <horstretch>0</horstretch>
+                    <verstretch>0</verstretch>
+                   </sizepolicy>
+                  </property>
+                  <property name="maximumSize">
+                   <size>
+                    <width>80</width>
+                    <height>16777215</height>
+                   </size>
+                  </property>
+                  <property name="baseSize">
+                   <size>
+                    <width>80</width>
+                    <height>0</height>
+                   </size>
+                  </property>
+                  <property name="text">
+                   <string>Report</string>
+                  </property>
+                 </widget>
+                </item>
+                <item>
+                 <widget class="QPushButton" name="report_apply_btn">
+                  <property name="sizePolicy">
+                   <sizepolicy hsizetype="Fixed" vsizetype="Expanding">
+                    <horstretch>0</horstretch>
+                    <verstretch>0</verstretch>
+                   </sizepolicy>
+                  </property>
+                  <property name="minimumSize">
+                   <size>
+                    <width>80</width>
+                    <height>0</height>
+                   </size>
+                  </property>
+                  <property name="maximumSize">
+                   <size>
+                    <width>80</width>
+                    <height>16777215</height>
+                   </size>
+                  </property>
+                  <property name="baseSize">
+                   <size>
+                    <width>80</width>
+                    <height>0</height>
+                   </size>
+                  </property>
+                  <property name="text">
+                   <string>Apply</string>
+                  </property>
+                 </widget>
+                </item>
+               </layout>
+              </item>
+             </layout>
+            </widget>
+           </item>
+          </layout>
+         </item>
+        </layout>
+       </widget>
+      </item>
+     </layout>
+    </item>
+   </layout>
+  </widget>
+  <action name="actionReset">
+   <property name="text">
+    <string>Reset</string>
+   </property>
+   <property name="toolTip">
+    <string>Reset the Thermostat</string>
+   </property>
+   <property name="menuRole">
+    <enum>QAction::NoRole</enum>
+   </property>
+  </action>
+  <action name="actionEnter_DFU_Mode">
+   <property name="text">
+    <string>Enter DFU Mode</string>
+   </property>
+   <property name="toolTip">
+    <string>Reset thermostat and enter USB device firmware update (DFU) mode</string>
+   </property>
+   <property name="menuRole">
+    <enum>QAction::NoRole</enum>
+   </property>
+  </action>
+  <action name="actionNetwork_Settings">
+   <property name="text">
+    <string>Network Settings</string>
+   </property>
+   <property name="toolTip">
+    <string>Configure IPv4 address, netmask length, and optional default gateway</string>
+   </property>
+   <property name="menuRole">
+    <enum>QAction::NoRole</enum>
+   </property>
+  </action>
+  <action name="actionAbout_Thermostat">
+   <property name="text">
+    <string>About Thermostat</string>
+   </property>
+   <property name="toolTip">
+    <string>Show Thermostat hardware revision, and settings related to i</string>
+   </property>
+   <property name="menuRole">
+    <enum>QAction::NoRole</enum>
+   </property>
+  </action>
+  <action name="actionLoad_all_configs">
+   <property name="text">
+    <string>Load all channel configs from flash</string>
+   </property>
+   <property name="toolTip">
+    <string>Restore configuration for all channels from flash</string>
+   </property>
+   <property name="menuRole">
+    <enum>QAction::NoRole</enum>
+   </property>
+  </action>
+  <action name="actionSave_all_configs">
+   <property name="text">
+    <string>Save all channel configs to flash</string>
+   </property>
+   <property name="toolTip">
+    <string>Save configuration for all channels to flash</string>
+   </property>
+   <property name="menuRole">
+    <enum>QAction::NoRole</enum>
+   </property>
+  </action>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>ParameterTree</class>
+   <extends>QWidget</extends>
+   <header>pyqtgraph.parametertree</header>
+   <container>1</container>
+  </customwidget>
+  <customwidget>
+   <class>LivePlotWidget</class>
+   <extends>QWidget</extends>
+   <header>pglive.sources.live_plot_widget</header>
+   <container>1</container>
+  </customwidget>
+  <customwidget>
+   <class>QtWaitingSpinner</class>
+   <extends>QWidget</extends>
+   <header>waitingspinnerwidget</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>

pytec/ui_tec_qt.py

@@ -0,0 +1,268 @@
+# Form implementation generated from reading ui file 'tec_qt.ui'
+#
+# Created by: PyQt6 UI code generator 6.5.2
+#
+# WARNING: Any manual changes made to this file will be lost when pyuic6 is
+# run again.  Do not edit this file unless you know what you are doing.
+
+
+from PyQt6 import QtCore, QtGui, QtWidgets
+
+
+class Ui_MainWindow(object):
+    def setupUi(self, MainWindow):
+        MainWindow.setObjectName("MainWindow")
+        MainWindow.resize(1280, 720)
+        MainWindow.setMinimumSize(QtCore.QSize(1280, 720))
+        MainWindow.setMaximumSize(QtCore.QSize(3840, 2160))
+        icon = QtGui.QIcon()
+        icon.addPixmap(QtGui.QPixmap("thermostat-icon-640x640.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
+        MainWindow.setWindowIcon(icon)
+        self.main_widget = QtWidgets.QWidget(parent=MainWindow)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Expanding, QtWidgets.QSizePolicy.Policy.Expanding)
+        sizePolicy.setHorizontalStretch(1)
+        sizePolicy.setVerticalStretch(1)
+        sizePolicy.setHeightForWidth(self.main_widget.sizePolicy().hasHeightForWidth())
+        self.main_widget.setSizePolicy(sizePolicy)
+        self.main_widget.setObjectName("main_widget")
+        self.gridLayout_2 = QtWidgets.QGridLayout(self.main_widget)
+        self.gridLayout_2.setContentsMargins(3, 3, 3, 3)
+        self.gridLayout_2.setSpacing(3)
+        self.gridLayout_2.setObjectName("gridLayout_2")
+        self.main_layout = QtWidgets.QVBoxLayout()
+        self.main_layout.setSpacing(0)
+        self.main_layout.setObjectName("main_layout")
+        self.graph_group = QtWidgets.QFrame(parent=self.main_widget)
+        self.graph_group.setEnabled(False)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Expanding, QtWidgets.QSizePolicy.Policy.Expanding)
+        sizePolicy.setHorizontalStretch(1)
+        sizePolicy.setVerticalStretch(1)
+        sizePolicy.setHeightForWidth(self.graph_group.sizePolicy().hasHeightForWidth())
+        self.graph_group.setSizePolicy(sizePolicy)
+        self.graph_group.setFrameShape(QtWidgets.QFrame.Shape.StyledPanel)
+        self.graph_group.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
+        self.graph_group.setObjectName("graph_group")
+        self.graphs_layout = QtWidgets.QGridLayout(self.graph_group)
+        self.graphs_layout.setSizeConstraint(QtWidgets.QLayout.SizeConstraint.SetDefaultConstraint)
+        self.graphs_layout.setContentsMargins(3, 3, 3, 3)
+        self.graphs_layout.setSpacing(2)
+        self.graphs_layout.setObjectName("graphs_layout")
+        self.ch1_tree = ParameterTree(parent=self.graph_group)
+        self.ch1_tree.setObjectName("ch1_tree")
+        self.graphs_layout.addWidget(self.ch1_tree, 1, 0, 1, 1)
+        self.ch0_tree = ParameterTree(parent=self.graph_group)
+        self.ch0_tree.setObjectName("ch0_tree")
+        self.graphs_layout.addWidget(self.ch0_tree, 0, 0, 1, 1)
+        self.ch1_t_graph = LivePlotWidget(parent=self.graph_group)
+        self.ch1_t_graph.setObjectName("ch1_t_graph")
+        self.graphs_layout.addWidget(self.ch1_t_graph, 1, 1, 1, 1)
+        self.ch0_t_graph = LivePlotWidget(parent=self.graph_group)
+        self.ch0_t_graph.setObjectName("ch0_t_graph")
+        self.graphs_layout.addWidget(self.ch0_t_graph, 0, 1, 1, 1)
+        self.ch0_i_graph = LivePlotWidget(parent=self.graph_group)
+        self.ch0_i_graph.setObjectName("ch0_i_graph")
+        self.graphs_layout.addWidget(self.ch0_i_graph, 0, 2, 1, 1)
+        self.ch1_i_graph = LivePlotWidget(parent=self.graph_group)
+        self.ch1_i_graph.setObjectName("ch1_i_graph")
+        self.graphs_layout.addWidget(self.ch1_i_graph, 1, 2, 1, 1)
+        self.graphs_layout.setColumnMinimumWidth(0, 100)
+        self.graphs_layout.setColumnMinimumWidth(1, 100)
+        self.graphs_layout.setColumnMinimumWidth(2, 100)
+        self.graphs_layout.setRowMinimumHeight(0, 100)
+        self.graphs_layout.setRowMinimumHeight(1, 100)
+        self.graphs_layout.setColumnStretch(0, 1)
+        self.graphs_layout.setColumnStretch(1, 1)
+        self.graphs_layout.setColumnStretch(2, 1)
+        self.graphs_layout.setRowStretch(0, 1)
+        self.graphs_layout.setRowStretch(1, 1)
+        self.main_layout.addWidget(self.graph_group)
+        self.bottom_settings_group = QtWidgets.QFrame(parent=self.main_widget)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Expanding, QtWidgets.QSizePolicy.Policy.Fixed)
+        sizePolicy.setHorizontalStretch(0)
+        sizePolicy.setVerticalStretch(0)
+        sizePolicy.setHeightForWidth(self.bottom_settings_group.sizePolicy().hasHeightForWidth())
+        self.bottom_settings_group.setSizePolicy(sizePolicy)
+        self.bottom_settings_group.setMinimumSize(QtCore.QSize(0, 40))
+        self.bottom_settings_group.setMaximumSize(QtCore.QSize(16777215, 40))
+        self.bottom_settings_group.setFrameShape(QtWidgets.QFrame.Shape.StyledPanel)
+        self.bottom_settings_group.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
+        self.bottom_settings_group.setObjectName("bottom_settings_group")
+        self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.bottom_settings_group)
+        self.horizontalLayout_2.setContentsMargins(3, 3, 3, 3)
+        self.horizontalLayout_2.setSpacing(3)
+        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
+        self.settings_layout = QtWidgets.QHBoxLayout()
+        self.settings_layout.setObjectName("settings_layout")
+        self.connect_btn = QtWidgets.QToolButton(parent=self.bottom_settings_group)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Fixed, QtWidgets.QSizePolicy.Policy.Expanding)
+        sizePolicy.setHorizontalStretch(0)
+        sizePolicy.setVerticalStretch(0)
+        sizePolicy.setHeightForWidth(self.connect_btn.sizePolicy().hasHeightForWidth())
+        self.connect_btn.setSizePolicy(sizePolicy)
+        self.connect_btn.setMinimumSize(QtCore.QSize(100, 0))
+        self.connect_btn.setMaximumSize(QtCore.QSize(100, 16777215))
+        self.connect_btn.setBaseSize(QtCore.QSize(100, 0))
+        self.connect_btn.setPopupMode(QtWidgets.QToolButton.ToolButtonPopupMode.MenuButtonPopup)
+        self.connect_btn.setToolButtonStyle(QtCore.Qt.ToolButtonStyle.ToolButtonFollowStyle)
+        self.connect_btn.setObjectName("connect_btn")
+        self.settings_layout.addWidget(self.connect_btn)
+        self.status_lbl = QtWidgets.QLabel(parent=self.bottom_settings_group)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Fixed, QtWidgets.QSizePolicy.Policy.Expanding)
+        sizePolicy.setHorizontalStretch(0)
+        sizePolicy.setVerticalStretch(0)
+        sizePolicy.setHeightForWidth(self.status_lbl.sizePolicy().hasHeightForWidth())
+        self.status_lbl.setSizePolicy(sizePolicy)
+        self.status_lbl.setMinimumSize(QtCore.QSize(240, 0))
+        self.status_lbl.setMaximumSize(QtCore.QSize(120, 16777215))
+        self.status_lbl.setBaseSize(QtCore.QSize(120, 50))
+        self.status_lbl.setObjectName("status_lbl")
+        self.settings_layout.addWidget(self.status_lbl)
+        self.thermostat_settings = QtWidgets.QToolButton(parent=self.bottom_settings_group)
+        self.thermostat_settings.setEnabled(False)
+        self.thermostat_settings.setText("⚙")
+        self.thermostat_settings.setPopupMode(QtWidgets.QToolButton.ToolButtonPopupMode.InstantPopup)
+        self.thermostat_settings.setObjectName("thermostat_settings")
+        self.settings_layout.addWidget(self.thermostat_settings)
+        self.plot_settings = QtWidgets.QToolButton(parent=self.bottom_settings_group)
+        self.plot_settings.setPopupMode(QtWidgets.QToolButton.ToolButtonPopupMode.InstantPopup)
+        self.plot_settings.setObjectName("plot_settings")
+        self.settings_layout.addWidget(self.plot_settings)
+        self.limits_warning = QtWidgets.QLabel(parent=self.bottom_settings_group)
+        self.limits_warning.setToolTipDuration(1000000000)
+        self.limits_warning.setObjectName("limits_warning")
+        self.settings_layout.addWidget(self.limits_warning)
+        self.background_task_lbl = QtWidgets.QLabel(parent=self.bottom_settings_group)
+        self.background_task_lbl.setObjectName("background_task_lbl")
+        self.settings_layout.addWidget(self.background_task_lbl)
+        self.loading_spinner = QtWaitingSpinner(parent=self.bottom_settings_group)
+        self.loading_spinner.setObjectName("loading_spinner")
+        self.settings_layout.addWidget(self.loading_spinner)
+        spacerItem = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Policy.Expanding, QtWidgets.QSizePolicy.Policy.Minimum)
+        self.settings_layout.addItem(spacerItem)
+        self.report_group = QtWidgets.QWidget(parent=self.bottom_settings_group)
+        self.report_group.setEnabled(False)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Minimum, QtWidgets.QSizePolicy.Policy.Expanding)
+        sizePolicy.setHorizontalStretch(0)
+        sizePolicy.setVerticalStretch(0)
+        sizePolicy.setHeightForWidth(self.report_group.sizePolicy().hasHeightForWidth())
+        self.report_group.setSizePolicy(sizePolicy)
+        self.report_group.setMinimumSize(QtCore.QSize(40, 0))
+        self.report_group.setObjectName("report_group")
+        self.horizontalLayout_4 = QtWidgets.QHBoxLayout(self.report_group)
+        self.horizontalLayout_4.setContentsMargins(0, 0, 0, 0)
+        self.horizontalLayout_4.setSpacing(0)
+        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
+        self.report_layout = QtWidgets.QHBoxLayout()
+        self.report_layout.setSizeConstraint(QtWidgets.QLayout.SizeConstraint.SetDefaultConstraint)
+        self.report_layout.setContentsMargins(0, -1, -1, -1)
+        self.report_layout.setSpacing(6)
+        self.report_layout.setObjectName("report_layout")
+        self.report_lbl = QtWidgets.QLabel(parent=self.report_group)
+        self.report_lbl.setAlignment(QtCore.Qt.AlignmentFlag.AlignRight|QtCore.Qt.AlignmentFlag.AlignTrailing|QtCore.Qt.AlignmentFlag.AlignVCenter)
+        self.report_lbl.setObjectName("report_lbl")
+        self.report_layout.addWidget(self.report_lbl)
+        self.report_refresh_spin = QtWidgets.QDoubleSpinBox(parent=self.report_group)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Fixed, QtWidgets.QSizePolicy.Policy.Expanding)
+        sizePolicy.setHorizontalStretch(0)
+        sizePolicy.setVerticalStretch(0)
+        sizePolicy.setHeightForWidth(self.report_refresh_spin.sizePolicy().hasHeightForWidth())
+        self.report_refresh_spin.setSizePolicy(sizePolicy)
+        self.report_refresh_spin.setMinimumSize(QtCore.QSize(70, 0))
+        self.report_refresh_spin.setMaximumSize(QtCore.QSize(70, 16777215))
+        self.report_refresh_spin.setBaseSize(QtCore.QSize(70, 0))
+        self.report_refresh_spin.setDecimals(1)
+        self.report_refresh_spin.setMinimum(0.1)
+        self.report_refresh_spin.setSingleStep(0.1)
+        self.report_refresh_spin.setStepType(QtWidgets.QAbstractSpinBox.StepType.AdaptiveDecimalStepType)
+        self.report_refresh_spin.setProperty("value", 1.0)
+        self.report_refresh_spin.setObjectName("report_refresh_spin")
+        self.report_layout.addWidget(self.report_refresh_spin)
+        self.report_box = QtWidgets.QCheckBox(parent=self.report_group)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Fixed, QtWidgets.QSizePolicy.Policy.Expanding)
+        sizePolicy.setHorizontalStretch(0)
+        sizePolicy.setVerticalStretch(0)
+        sizePolicy.setHeightForWidth(self.report_box.sizePolicy().hasHeightForWidth())
+        self.report_box.setSizePolicy(sizePolicy)
+        self.report_box.setMaximumSize(QtCore.QSize(80, 16777215))
+        self.report_box.setBaseSize(QtCore.QSize(80, 0))
+        self.report_box.setObjectName("report_box")
+        self.report_layout.addWidget(self.report_box)
+        self.report_apply_btn = QtWidgets.QPushButton(parent=self.report_group)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Fixed, QtWidgets.QSizePolicy.Policy.Expanding)
+        sizePolicy.setHorizontalStretch(0)
+        sizePolicy.setVerticalStretch(0)
+        sizePolicy.setHeightForWidth(self.report_apply_btn.sizePolicy().hasHeightForWidth())
+        self.report_apply_btn.setSizePolicy(sizePolicy)
+        self.report_apply_btn.setMinimumSize(QtCore.QSize(80, 0))
+        self.report_apply_btn.setMaximumSize(QtCore.QSize(80, 16777215))
+        self.report_apply_btn.setBaseSize(QtCore.QSize(80, 0))
+        self.report_apply_btn.setObjectName("report_apply_btn")
+        self.report_layout.addWidget(self.report_apply_btn)
+        self.report_layout.setStretch(1, 1)
+        self.report_layout.setStretch(2, 1)
+        self.report_layout.setStretch(3, 1)
+        self.horizontalLayout_4.addLayout(self.report_layout)
+        self.settings_layout.addWidget(self.report_group)
+        self.horizontalLayout_2.addLayout(self.settings_layout)
+        self.main_layout.addWidget(self.bottom_settings_group)
+        self.gridLayout_2.addLayout(self.main_layout, 0, 1, 1, 1)
+        MainWindow.setCentralWidget(self.main_widget)
+        self.actionReset = QtGui.QAction(parent=MainWindow)
+        self.actionReset.setMenuRole(QtGui.QAction.MenuRole.NoRole)
+        self.actionReset.setObjectName("actionReset")
+        self.actionEnter_DFU_Mode = QtGui.QAction(parent=MainWindow)
+        self.actionEnter_DFU_Mode.setMenuRole(QtGui.QAction.MenuRole.NoRole)
+        self.actionEnter_DFU_Mode.setObjectName("actionEnter_DFU_Mode")
+        self.actionNetwork_Settings = QtGui.QAction(parent=MainWindow)
+        self.actionNetwork_Settings.setMenuRole(QtGui.QAction.MenuRole.NoRole)
+        self.actionNetwork_Settings.setObjectName("actionNetwork_Settings")
+        self.actionAbout_Thermostat = QtGui.QAction(parent=MainWindow)
+        self.actionAbout_Thermostat.setMenuRole(QtGui.QAction.MenuRole.NoRole)
+        self.actionAbout_Thermostat.setObjectName("actionAbout_Thermostat")
+        self.actionLoad_all_configs = QtGui.QAction(parent=MainWindow)
+        self.actionLoad_all_configs.setMenuRole(QtGui.QAction.MenuRole.NoRole)
+        self.actionLoad_all_configs.setObjectName("actionLoad_all_configs")
+        self.actionSave_all_configs = QtGui.QAction(parent=MainWindow)
+        self.actionSave_all_configs.setMenuRole(QtGui.QAction.MenuRole.NoRole)
+        self.actionSave_all_configs.setObjectName("actionSave_all_configs")
+
+        self.retranslateUi(MainWindow)
+        QtCore.QMetaObject.connectSlotsByName(MainWindow)
+
+    def retranslateUi(self, MainWindow):
+        _translate = QtCore.QCoreApplication.translate
+        MainWindow.setWindowTitle(_translate("MainWindow", "Thermostat Control Panel"))
+        self.connect_btn.setText(_translate("MainWindow", "Connect"))
+        self.status_lbl.setText(_translate("MainWindow", "Disconnected"))
+        self.plot_settings.setToolTip(_translate("MainWindow", "Plot Settings"))
+        self.plot_settings.setText(_translate("MainWindow", "📉"))
+        self.background_task_lbl.setText(_translate("MainWindow", "Ready."))
+        self.report_lbl.setText(_translate("MainWindow", "Poll every: "))
+        self.report_refresh_spin.setSuffix(_translate("MainWindow", " s"))
+        self.report_box.setText(_translate("MainWindow", "Report"))
+        self.report_apply_btn.setText(_translate("MainWindow", "Apply"))
+        self.actionReset.setText(_translate("MainWindow", "Reset"))
+        self.actionReset.setToolTip(_translate("MainWindow", "Reset the Thermostat"))
+        self.actionEnter_DFU_Mode.setText(_translate("MainWindow", "Enter DFU Mode"))
+        self.actionEnter_DFU_Mode.setToolTip(_translate("MainWindow", "Reset thermostat and enter USB device firmware update (DFU) mode"))
+        self.actionNetwork_Settings.setText(_translate("MainWindow", "Network Settings"))
+        self.actionNetwork_Settings.setToolTip(_translate("MainWindow", "Configure IPv4 address, netmask length, and optional default gateway"))
+        self.actionAbout_Thermostat.setText(_translate("MainWindow", "About Thermostat"))
+        self.actionAbout_Thermostat.setToolTip(_translate("MainWindow", "Show Thermostat hardware revision, and settings related to i"))
+        self.actionLoad_all_configs.setText(_translate("MainWindow", "Load all channel configs from flash"))
+        self.actionLoad_all_configs.setToolTip(_translate("MainWindow", "Restore configuration for all channels from flash"))
+        self.actionSave_all_configs.setText(_translate("MainWindow", "Save all channel configs to flash"))
+        self.actionSave_all_configs.setToolTip(_translate("MainWindow", "Save configuration for all channels to flash"))
+from pglive.sources.live_plot_widget import LivePlotWidget
+from pyqtgraph.parametertree import ParameterTree
+from waitingspinnerwidget import QtWaitingSpinner
+
+
+if __name__ == "__main__":
+    import sys
+    app = QtWidgets.QApplication(sys.argv)
+    MainWindow = QtWidgets.QMainWindow()
+    ui = Ui_MainWindow()
+    ui.setupUi(MainWindow)
+    MainWindow.show()
+    sys.exit(app.exec())

pytec/waitingspinnerwidget.py

@@ -0,0 +1,194 @@
+"""
+The MIT License (MIT)
+
+Copyright (c) 2012-2014 Alexander Turkin
+Copyright (c) 2014 William Hallatt
+Copyright (c) 2015 Jacob Dawid
+Copyright (c) 2016 Luca Weiss
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+"""
+
+import math
+
+from PyQt6.QtCore import *
+from PyQt6.QtGui import *
+from PyQt6.QtWidgets import *
+
+
+class QtWaitingSpinner(QWidget):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+
+        # WAS IN initialize()
+        self._color = QColor(Qt.GlobalColor.black)
+        self._roundness = 100.0
+        self._minimumTrailOpacity = 3.14159265358979323846
+        self._trailFadePercentage = 80.0
+        self._revolutionsPerSecond = 1.57079632679489661923
+        self._numberOfLines = 20
+        self._lineLength = 5
+        self._lineWidth = 2
+        self._innerRadius = 5
+        self._currentCounter = 0
+
+        self._timer = QTimer(self)
+        self._timer.timeout.connect(self.rotate)
+        self.updateSize()
+        self.updateTimer()
+        # END initialize()
+
+        self.setAttribute(Qt.WidgetAttribute.WA_TranslucentBackground)
+
+    def paintEvent(self, QPaintEvent):
+        painter = QPainter(self)
+        painter.fillRect(self.rect(), Qt.GlobalColor.transparent)
+        painter.setRenderHint(QPainter.RenderHint.Antialiasing, True)
+
+        if self._currentCounter >= self._numberOfLines:
+            self._currentCounter = 0
+
+        painter.setPen(Qt.PenStyle.NoPen)
+        for i in range(0, self._numberOfLines):
+            painter.save()
+            painter.translate(self._innerRadius + self._lineLength, self._innerRadius + self._lineLength)
+            rotateAngle = float(360 * i) / float(self._numberOfLines)
+            painter.rotate(rotateAngle)
+            painter.translate(self._innerRadius, 0)
+            distance = self.lineCountDistanceFromPrimary(i, self._currentCounter, self._numberOfLines)
+            color = self.currentLineColor(distance, self._numberOfLines, self._trailFadePercentage,
+                                          self._minimumTrailOpacity, self._color)
+            painter.setBrush(color)
+            painter.drawRoundedRect(QRect(0, int(-self._lineWidth / 2), self._lineLength, self._lineWidth), self._roundness,
+                                    self._roundness, Qt.SizeMode.RelativeSize)
+            painter.restore()
+
+    def start(self):
+        if not self._timer.isActive():
+            self._timer.start()
+            self._currentCounter = 0
+
+    def stop(self):
+        if self._timer.isActive():
+            self._timer.stop()
+            self._currentCounter = 0
+
+    def setNumberOfLines(self, lines):
+        self._numberOfLines = lines
+        self._currentCounter = 0
+        self.updateTimer()
+
+    def setLineLength(self, length):
+        self._lineLength = length
+        self.updateSize()
+
+    def setLineWidth(self, width):
+        self._lineWidth = width
+        self.updateSize()
+
+    def setInnerRadius(self, radius):
+        self._innerRadius = radius
+        self.updateSize()
+
+    def color(self):
+        return self._color
+
+    def roundness(self):
+        return self._roundness
+
+    def minimumTrailOpacity(self):
+        return self._minimumTrailOpacity
+
+    def trailFadePercentage(self):
+        return self._trailFadePercentage
+
+    def revolutionsPersSecond(self):
+        return self._revolutionsPerSecond
+
+    def numberOfLines(self):
+        return self._numberOfLines
+
+    def lineLength(self):
+        return self._lineLength
+
+    def lineWidth(self):
+        return self._lineWidth
+
+    def innerRadius(self):
+        return self._innerRadius
+
+    def setRoundness(self, roundness):
+        self._roundness = max(0.0, min(100.0, roundness))
+
+    def setColor(self, color=Qt.GlobalColor.black):
+        self._color = QColor(color)
+
+    def setRevolutionsPerSecond(self, revolutionsPerSecond):
+        self._revolutionsPerSecond = revolutionsPerSecond
+        self.updateTimer()
+
+    def setTrailFadePercentage(self, trail):
+        self._trailFadePercentage = trail
+
+    def setMinimumTrailOpacity(self, minimumTrailOpacity):
+        self._minimumTrailOpacity = minimumTrailOpacity
+
+    def rotate(self):
+        self._currentCounter += 1
+        if self._currentCounter >= self._numberOfLines:
+            self._currentCounter = 0
+        self.update()
+
+    def updateSize(self):
+        self.size = (self._innerRadius + self._lineLength) * 2
+        self.setFixedSize(self.size, self.size)
+
+    def updateTimer(self):
+        self._timer.setInterval(int(1000 / (self._numberOfLines * self._revolutionsPerSecond)))
+
+    def lineCountDistanceFromPrimary(self, current, primary, totalNrOfLines):
+        distance = primary - current
+        if distance < 0:
+            distance += totalNrOfLines
+        return distance
+
+    def currentLineColor(self, countDistance, totalNrOfLines, trailFadePerc, minOpacity, colorinput):
+        color = QColor(colorinput)
+        if countDistance == 0:
+            return color
+        minAlphaF = minOpacity / 100.0
+        distanceThreshold = int(math.ceil((totalNrOfLines - 1) * trailFadePerc / 100.0))
+        if countDistance > distanceThreshold:
+            color.setAlphaF(minAlphaF)
+        else:
+            alphaDiff = color.alphaF() - minAlphaF
+            gradient = alphaDiff / float(distanceThreshold + 1)
+            resultAlpha = color.alphaF() - gradient * countDistance
+            # If alpha is out of bounds, clip it.
+            resultAlpha = min(1.0, max(0.0, resultAlpha))
+            color.setAlphaF(resultAlpha)
+        return color
+
+
+if __name__ == '__main__':
+    app = QApplication([])
+    waiting_spinner = QtWaitingSpinner()
+    waiting_spinner.show()
+    waiting_spinner.start()
+    app.exec()

src/channel_state.rs

@@ -35,6 +35,7 @@ pub struct ChannelState {
     pub pid_engaged: bool,
     pub pid: pid::Controller,
     pub sh: sh::Parameters,
+    pub swap_tec_polarity: bool,
 }
 
 impl ChannelState {
@@ -51,6 +52,7 @@ impl ChannelState {
             pid_engaged: false,
             pid: pid::Controller::new(pid::Parameters::default()),
             sh: sh::Parameters::default(),
+            swap_tec_polarity: false,
         }
     }
 

src/channels.rs

@@ -113,8 +113,20 @@ impl<'a> Channels<'a> {
     }
 
     pub fn get_i(&mut self, channel: usize) -> ElectricCurrent {
-        let i_set = self.channel_state(channel).i_set;
-        i_set
+        let center_point = match channel.into() {
+            0 => self.channel0.vref_meas,
+            1 => self.channel1.vref_meas,
+            _ => unreachable!(),
+        };
+        // let i_set = self.channel_state(channel).i_set;
+        let r_sense = ElectricalResistance::new::<ohm>(R_SENSE);
+        let voltage = self.get_dac(channel);
+        let i_tec = (voltage - center_point) / (10.0 * r_sense);
+        if self.channel_state(channel).swap_tec_polarity {
+            -i_tec
+        } else {
+            i_tec
+        }
     }
 
     /// i_set DAC
@@ -129,19 +141,24 @@ impl<'a> Channels<'a> {
         voltage
     }
 
-    pub fn set_i(&mut self, channel: usize, i_set: ElectricCurrent) -> ElectricCurrent {
+    pub fn set_i(&mut self, channel: usize, i_tec: ElectricCurrent) -> ElectricCurrent {
         let vref_meas = match channel.into() {
             0 => self.channel0.vref_meas,
             1 => self.channel1.vref_meas,
             _ => unreachable!(),
         };
+        let i_set = if self.channel_state(channel).swap_tec_polarity {
+            -i_tec
+        } else {
+            i_tec
+        };
         let center_point = vref_meas;
         let r_sense = ElectricalResistance::new::<ohm>(R_SENSE);
         let voltage = i_set * 10.0 * r_sense + center_point;
         let voltage = self.set_dac(channel, voltage);
-        let i_set = (voltage - center_point) / (10.0 * r_sense);
+        let i_tec = (voltage - center_point) / (10.0 * r_sense);
         self.channel_state(channel).i_set = i_set;
-        i_set
+        i_tec
     }
 
     pub fn read_dac_feedback(&mut self, channel: usize) -> ElectricPotential {
@@ -371,7 +388,12 @@ impl<'a> Channels<'a> {
 
     // Get current passing through TEC
     pub fn get_tec_i(&mut self, channel: usize) -> ElectricCurrent {
-        (self.read_itec(channel) - self.read_vref(channel)) / ElectricalResistance::new::<ohm>(0.4)
+        let tec_i = (self.read_itec(channel) - self.read_vref(channel)) / ElectricalResistance::new::<ohm>(0.4);
+        if self.channel_state(channel).swap_tec_polarity {
+            -tec_i
+        } else {
+            tec_i
+        }
     }
 
     // Get voltage across TEC
@@ -443,6 +465,7 @@ impl<'a> Channels<'a> {
             temperature: state.get_temperature()
                 .map(|temperature| temperature.get::<degree_celsius>()),
             pid_engaged: state.pid_engaged,
+            current_swapped: state.swap_tec_polarity,
             i_set,
             dac_value,
             dac_feedback: self.read_dac_feedback(channel),
@@ -540,6 +563,7 @@ pub struct Report {
     sens: Option<ElectricalResistance>,
     temperature: Option<f64>,
     pid_engaged: bool,
+    current_swapped: bool,
     i_set: ElectricCurrent,
     dac_value: ElectricPotential,
     dac_feedback: ElectricPotential,

src/command_handler.rs

@@ -412,6 +412,14 @@ impl Handler {
         }
     }
 
+    fn swap_tec_polarity (socket: &mut TcpSocket, channels: &mut Channels) -> Result<Handler, Error> {
+        for c in 0..CHANNELS {
+            channels.channel_state(c).swap_tec_polarity = !channels.channel_state(c).swap_tec_polarity;
+        }
+        send_line(socket, b"{}");
+        Ok(Handler::Handled)
+    }
+
     pub fn handle_command(command: Command, socket: &mut TcpSocket, channels: &mut Channels, session: &Session, store: &mut FlashStore, ipv4_config: &mut Ipv4Config, fan_ctrl: &mut FanCtrl, hwrev: HWRev) -> Result<Self, Error> {
         match command {
             Command::Quit => Ok(Handler::CloseSocket),
@@ -441,6 +449,7 @@ impl Handler {
             Command::FanCurve { k_a, k_b, k_c } => Handler::fan_curve(socket, fan_ctrl, k_a, k_b, k_c),
             Command::FanCurveDefaults => Handler::fan_defaults(socket, fan_ctrl),
             Command::ShowHWRev => Handler::show_hwrev(socket, hwrev),
+            Command::SwapTECPolarity => Handler::swap_tec_polarity(socket, channels),
         }
     }
 }

src/command_parser.rs

@@ -191,6 +191,7 @@ pub enum Command {
     },
     FanCurveDefaults,
     ShowHWRev,
+    SwapTECPolarity,
 }
 
 fn end(input: &[u8]) -> IResult<&[u8], ()> {
@@ -600,6 +601,7 @@ fn command(input: &[u8]) -> IResult<&[u8], Result<Command, Error>> {
          fan,
          fan_curve,
          value(Ok(Command::ShowHWRev), tag("hwrev")),
+         value(Ok(Command::SwapTECPolarity), tag("swap")),
     ))(input)
 }
 

src/config.rs

@@ -22,6 +22,7 @@ pub struct ChannelConfig {
     pwm: PwmLimits,
     /// uses variant `PostFilter::Invalid` instead of `None` to save space
     adc_postfilter: PostFilter,
+    swap_tec_polarity: bool,
 }
 
 impl ChannelConfig {
@@ -41,6 +42,7 @@ impl ChannelConfig {
             sh: state.sh.clone(),
             pwm,
             adc_postfilter,
+            swap_tec_polarity: state.swap_tec_polarity,
         }
     }
 
@@ -51,6 +53,7 @@ impl ChannelConfig {
         state.pid.target = self.pid_target.into();
         state.pid_engaged = self.pid_engaged;
         state.sh = self.sh.clone();
+        state.swap_tec_polarity = self.swap_tec_polarity;
 
         self.pwm.apply(channels, channel);