pytec: Add hardware testing script

Eases the process of testing the hardware.

See #143.

flake.nix

@@ -57,10 +57,22 @@
         dontFixup = true;
         auditable = false;
       };
+
+      pytec = pkgs.python3Packages.buildPythonPackage {
+        pname = "pytec";
+        version = "0.0.0";
+        src = "${self}/pytec";
+
+        propagatedBuildInputs =
+          with pkgs.python3Packages; [
+            numpy
+            matplotlib
+          ];
+      };
     in
     {
       packages.x86_64-linux = {
-        inherit thermostat;
+        inherit thermostat pytec;
         default = thermostat;
       };
 

pytec/example.py

@@ -1,3 +1,4 @@
+import time
 from pytec.client import Client
 
 tec = Client() #(host="localhost", port=6667)
@@ -7,5 +8,6 @@ print(tec.get_pid())
 print(tec.get_output())
 print(tec.get_postfilter())
 print(tec.get_b_parameter())
-for data in tec.report_mode():
+while True:
-    print(data)
+    print(tec.get_report())
+    time.sleep(0.05)

pytec/pytec/client.py

@@ -1,7 +1,7 @@
 import socket
 import json
 import logging
-import time
+
 
 class CommandError(Exception):
     pass
@@ -147,36 +147,6 @@ class Client:
         """Get Thermostat hardware revision"""
         return self._command("hwrev")
 
-    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}
-        """
-        while True:
-            self._socket.sendall("report\n".encode('utf-8'))
-            line = self._read_line()
-            if not line:
-                break
-            try:
-                yield json.loads(line)
-            except json.decoder.JSONDecodeError:
-                pass
-            time.sleep(0.05)
-
     def set_param(self, topic, channel, field="", value=""):
         """Set configuration parameters
 

pytec/test.py

@@ -0,0 +1,81 @@
+import argparse
+from contextlib import contextmanager
+from pytec.client import Client
+
+
+CHANNELS = 2
+
+
+def get_argparser():
+    parser = argparse.ArgumentParser(description="Thermostat hardware testing script")
+
+    parser.add_argument("host", metavar="HOST", default="192.168.1.26", nargs="?")
+    parser.add_argument("port", metavar="PORT", default=23, nargs="?")
+    parser.add_argument(
+        "-r",
+        "--testing_resistance",
+        default=10_000,
+        help="Testing resistance value through SENS pin in Ohms",
+    )
+    parser.add_argument(
+        "-d",
+        "--deviation",
+        default=1,
+        help="Allowed deviation of resistance in percentage",
+    )
+
+    return parser
+
+
+def main():
+    args = get_argparser().parse_args()
+
+    min_allowed_resistance = args.testing_resistance * (1 - args.deviation / 100)
+    max_allowed_resistance = args.testing_resistance * (1 + args.deviation / 100)
+
+    print(min_allowed_resistance, max_allowed_resistance)
+
+    thermostat = Client(args.host, args.port)
+    for channel in range(CHANNELS):
+        print(f"Channel {channel} is active")
+
+        print("Checking resistance through SENS input ....", end=" ")
+        sens_resistance = thermostat.get_report()[channel]["sens"]
+        if sens_resistance is not None:
+            print(sens_resistance, "Ω")
+            if min_allowed_resistance <= sens_resistance <= max_allowed_resistance:
+                print("PASSED")
+            else:
+                print("FAILED")
+        else:
+            print("Floating SENS input! Is the channel connected?")
+
+        with preserve_thermostat_output_settings(thermostat, channel):
+            test_output_settings = {
+                "max_i_pos": 2,
+                "max_i_neg": 2,
+                "max_v": 4,
+                "i_set": 0.1,
+                "polarity": "normal",
+            }
+            for field, value in test_output_settings.items():
+                thermostat.set_param("output", channel, field, value)
+
+            input(f"Check if channel {channel} current = 0.1 A, and press ENTER...")
+
+        input(f"Channel {channel} testing done, press ENTER to continue.")
+        print()
+
+    print("Testing complete.")
+
+
+@contextmanager
+def preserve_thermostat_output_settings(client, channel):
+    original_output_settings = client.get_output()[channel]
+    yield original_output_settings
+    for setting in "max_i_pos", "max_i_neg", "max_v", "i_set", "polarity":
+        client.set_param("output", channel, setting, original_output_settings[setting])
+
+
+if __name__ == "__main__":
+    main()