ThermHygroMeter (and all thermometers): add setApplyCorrections method

  which disables applying corrections on SD side.

src/supla/sensor/therm_hygro_meter.cpp

@@ -91,19 +91,21 @@ void Supla::Sensor::ThermHygroMeter::onLoadConfig(SuplaDeviceClass *sdc) {
     return;
   }
 
-  // set temperature correction
-  auto cfgTempCorrection = getConfiguredTemperatureCorrection();
-  double correction = 1.0 * cfgTempCorrection / 10.0;
-  getChannel()->setCorrection(correction);
-  SUPLA_LOG_DEBUG("Channel[%d] temperature correction %.2f",
-      getChannelNumber(), correction);
-
-  // set humidity correction
-  auto cfgHumCorrection = getConfiguredHumidityCorrection();
-  correction = 1.0 * cfgHumCorrection / 10.0;
-  getChannel()->setCorrection(correction, true);
-  SUPLA_LOG_DEBUG("Channel[%d] humidity correction %.2f",
-      getChannelNumber(), correction);
+  if (applyCorrections) {
+    // set temperature correction
+    auto cfgTempCorrection = getConfiguredTemperatureCorrection();
+    double correction = 1.0 * cfgTempCorrection / 10.0;
+    getChannel()->setCorrection(correction);
+    SUPLA_LOG_DEBUG("Channel[%d] temperature correction %.2f",
+        getChannelNumber(), correction);
+
+    // set humidity correction
+    auto cfgHumCorrection = getConfiguredHumidityCorrection();
+    correction = 1.0 * cfgHumCorrection / 10.0;
+    getChannel()->setCorrection(correction, true);
+    SUPLA_LOG_DEBUG("Channel[%d] humidity correction %.2f",
+        getChannelNumber(), correction);
+  }
 
   // load config changed offline flags
   loadConfigChangeFlag();
@@ -269,3 +271,7 @@ void Supla::Sensor::ThermHygroMeter::fillChannelConfig(void *channelConfig,
   config->AdjustmentAppliedByDevice = 1;
 }
 
+void Supla::Sensor::ThermHygroMeter::setApplyCorrections(
+    bool applyCorrections) {
+  this->applyCorrections = applyCorrections;
+}

src/supla/sensor/therm_hygro_meter.h

@@ -52,6 +52,16 @@ class ThermHygroMeter : public ChannelElement {
                                   int32_t humidityCorrection,
                                   bool local = false);
 
+  // By default temperature and humidity corrections are applied on Channel
+  // level, so raw value is read from sensor, then it is corrected and
+  // send to server.
+  // However correction may be applied by a sensor device itself. In this
+  // case, correciton is send to that device and value read from sensor is
+  // already corrected.
+  //
+  // This function sets whether correction should be applied or not.
+  void setApplyCorrections(bool applyCorrections);
+
  protected:
   int16_t readCorrectionFromIndex(int index);
   void setCorrectionAtIndex(int32_t correction, int index);
@@ -60,6 +70,7 @@ class ThermHygroMeter : public ChannelElement {
 
   uint32_t lastReadTime = 0;
   uint16_t refreshIntervalMs = 10000;
+  bool applyCorrections = true;
 };
 
 };  // namespace Sensor