gui: Display -273.15 if thermistor is not detected

- if tec_temp == None -> Hide temp_plot graph and display -273.15 on ctrl panel

pykirdy/kirdy_qt.py

@@ -216,7 +216,12 @@ class Graphs:
                 self._pd_mon_pwr_plot.hide()
                 self.pd_mon_pwr_connector.cb_append_data_point(0.0, ts)
 
-            if tec_temp is not None:
+            if tec_temp is None:
+                self._tec_temp_plot.hide()
+                tec_temp = -273.15
+            else:
+                self._tec_temp_plot.show()
+
             self.tec_temp_connector.cb_append_data_point(tec_temp, ts)
             if self._temp_setpoint_line.isVisible():
                 self.tec_setpoint_connector.cb_append_data_point(self._temp_setpoint_line.value(), ts)
@@ -225,6 +230,7 @@ class Graphs:
             if tec_i_measure is not None:
                 self.tec_i_measure_connector.cb_append_data_point(tec_i_measure, ts)
             self.tec_i_target_connector.cb_append_data_point(tec_i_set, ts)
+
         except Exception as e:
             logging.error(f"Graph Value cannot be updated. Data:{report}", exc_info=True)
 
@@ -660,7 +666,6 @@ class MainWindow(QtWidgets.QMainWindow):
                         param.parent().child('Lookback').value())
                     self.autotuner.setReady()
                     param.setOpts(title="Stop")
-                    self.kirdy_data_watcher.set_report_mode(True)
                     await self.kirdy.thermostat.set_constant_current_control_mode()
                     self.kirdy_data_watcher.report_update_sig.connect(self.autotune_tick)
                     self.loading_spinner.show()
@@ -858,6 +863,9 @@ class MainWindow(QtWidgets.QMainWindow):
                 self.params[2].child('Power').setValue('g' if report['pwr_on'] else 'w')
                 self.params[2].child('Alarm').setValue('r' if report['temp_mon_status']['over_temp_alarm'] else 'w')
             with QSignalBlocker(self.params[3]):
+                if report["temperature"] == None:
+                    self.params[3].child('Readings', 'Temperature').setValue(-273.15)
+                else:
                     self.params[3].child('Readings', 'Temperature').setValue(report["temperature"])
                 self.params[3].child('Readings', 'Current through TEC').setValue(report["tec_i"])
         except Exception as e: