Merge pull request #1886 from betaphi/BME280_Patch
Usermod BME280_v2 refinement
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commit
c4201d9a2a
@ -12,10 +12,11 @@ private:
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// User-defined configuration
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#define Celsius // Show temperature mesaurement in Celcius. Comment out for Fahrenheit
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#define TemperatureDecimals 1 // Number of decimal places in published temperaure values
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#define HumidityDecimals 0 // Number of decimal places in published humidity values
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#define HumidityDecimals 2 // Number of decimal places in published humidity values
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#define PressureDecimals 2 // Number of decimal places in published pressure values
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#define TemperatureInterval 5 // Interval to measure temperature (and humidity, dew point if available) in seconds
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#define PressureInterval 300 // Interval to measure pressure in seconds
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#define PublishAlways 0 // Publish values even when they have not changed
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// Sanity checks
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#if !defined(TemperatureDecimals) || TemperatureDecimals < 0
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@ -33,6 +34,9 @@ private:
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#if !defined(PressureInterval) || PressureInterval < 0
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#define PressureInterval TemperatureInterval
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#endif
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#if !defined(PublishAlways)
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#define PublishAlways 0
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#endif
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#ifdef ARDUINO_ARCH_ESP32 // ESP32 boards
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uint8_t SCL_PIN = 22;
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@ -58,7 +62,7 @@ private:
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BME280I2C bme{settings};
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uint8_t SensorType;
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uint8_t sensorType;
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// Measurement timers
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long timer;
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@ -66,11 +70,11 @@ private:
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long lastPressureMeasure = 0;
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// Current sensor values
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float SensorTemperature;
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float SensorHumidity;
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float SensorHeatIndex;
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float SensorDewPoint;
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float SensorPressure;
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float sensorTemperature;
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float sensorHumidity;
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float sensorHeatIndex;
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float sensorDewPoint;
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float sensorPressure;
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// Track previous sensor values
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float lastTemperature;
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float lastHumidity;
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@ -96,13 +100,13 @@ private:
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bme.read(_pressure, _temperature, _humidity, tempUnit, presUnit);
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SensorTemperature = _temperature;
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SensorHumidity = _humidity;
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SensorPressure = _pressure;
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if (SensorType == 1)
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sensorTemperature = _temperature;
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sensorHumidity = _humidity;
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sensorPressure = _pressure;
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if (sensorType == 1)
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{
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SensorHeatIndex = EnvironmentCalculations::HeatIndex(_temperature, _humidity, envTempUnit);
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SensorDewPoint = EnvironmentCalculations::DewPoint(_temperature, _humidity, envTempUnit);
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sensorHeatIndex = EnvironmentCalculations::HeatIndex(_temperature, _humidity, envTempUnit);
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sensorDewPoint = EnvironmentCalculations::DewPoint(_temperature, _humidity, envTempUnit);
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}
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}
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@ -113,7 +117,7 @@ public:
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if (!bme.begin())
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{
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SensorType = 0;
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sensorType = 0;
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Serial.println("Could not find BME280I2C sensor!");
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}
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else
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@ -121,15 +125,15 @@ public:
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switch (bme.chipModel())
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{
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case BME280::ChipModel_BME280:
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SensorType = 1;
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sensorType = 1;
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Serial.println("Found BME280 sensor! Success.");
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break;
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case BME280::ChipModel_BMP280:
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SensorType = 2;
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sensorType = 2;
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Serial.println("Found BMP280 sensor! No Humidity available.");
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break;
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default:
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SensorType = 0;
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sensorType = 0;
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Serial.println("Found UNKNOWN sensor! Error!");
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}
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}
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@ -139,7 +143,7 @@ public:
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{
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// BME280 sensor MQTT publishing
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// Check if sensor present and MQTT Connected, otherwise it will crash the MCU
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if (SensorType != 0 && mqtt != nullptr)
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if (sensorType != 0 && mqtt != nullptr)
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{
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// Timer to fetch new temperature, humidity and pressure data at intervals
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timer = millis();
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@ -148,48 +152,48 @@ public:
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{
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lastTemperatureMeasure = timer;
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UpdateBME280Data(SensorType);
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UpdateBME280Data(sensorType);
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float Temperature = roundf(SensorTemperature * pow(10, TemperatureDecimals)) / pow(10, TemperatureDecimals);
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float Humidity, HeatIndex, DewPoint;
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float temperature = roundf(sensorTemperature * pow(10, TemperatureDecimals)) / pow(10, TemperatureDecimals);
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float humidity, heatIndex, dewPoint;
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// If temperature has changed since last measure, create string populated with device topic
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// from the UI and values read from sensor, then publish to broker
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if (Temperature != lastTemperature)
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if (temperature != lastTemperature || PublishAlways)
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{
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String topic = String(mqttDeviceTopic) + "/temperature";
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mqttTemperaturePub = mqtt->publish(topic.c_str(), 0, false, String(Temperature, TemperatureDecimals).c_str());
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mqttTemperaturePub = mqtt->publish(topic.c_str(), 0, false, String(temperature, TemperatureDecimals).c_str());
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}
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lastTemperature = Temperature; // Update last sensor temperature for next loop
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lastTemperature = temperature; // Update last sensor temperature for next loop
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if (SensorType == 1) // Only if sensor is a BME280
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if (sensorType == 1) // Only if sensor is a BME280
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{
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Humidity = roundf(SensorHumidity * pow(10, HumidityDecimals)) / pow(10, HumidityDecimals);
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HeatIndex = roundf(SensorHeatIndex * pow(10, TemperatureDecimals)) / pow(10, TemperatureDecimals);
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DewPoint = roundf(SensorDewPoint * pow(10, TemperatureDecimals)) / pow(10, TemperatureDecimals);
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humidity = roundf(sensorHumidity * pow(10, HumidityDecimals)) / pow(10, HumidityDecimals);
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heatIndex = roundf(sensorHeatIndex * pow(10, TemperatureDecimals)) / pow(10, TemperatureDecimals);
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dewPoint = roundf(sensorDewPoint * pow(10, TemperatureDecimals)) / pow(10, TemperatureDecimals);
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if (Humidity != lastHumidity)
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if (humidity != lastHumidity || PublishAlways)
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{
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String topic = String(mqttDeviceTopic) + "/humidity";
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mqtt->publish(topic.c_str(), 0, false, String(Humidity, HumidityDecimals).c_str());
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mqtt->publish(topic.c_str(), 0, false, String(humidity, HumidityDecimals).c_str());
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}
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if (HeatIndex != lastHeatIndex)
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if (heatIndex != lastHeatIndex || PublishAlways)
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{
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String topic = String(mqttDeviceTopic) + "/heat_index";
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mqtt->publish(topic.c_str(), 0, false, String(HeatIndex, TemperatureDecimals).c_str());
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mqtt->publish(topic.c_str(), 0, false, String(heatIndex, TemperatureDecimals).c_str());
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}
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if (DewPoint != lastDewPoint)
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if (dewPoint != lastDewPoint || PublishAlways)
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{
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String topic = String(mqttDeviceTopic) + "/dew_point";
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mqtt->publish(topic.c_str(), 0, false, String(DewPoint, TemperatureDecimals).c_str());
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mqtt->publish(topic.c_str(), 0, false, String(dewPoint, TemperatureDecimals).c_str());
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}
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lastHumidity = Humidity;
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lastHeatIndex = HeatIndex;
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lastDewPoint = DewPoint;
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lastHumidity = humidity;
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lastHeatIndex = heatIndex;
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lastDewPoint = dewPoint;
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}
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}
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@ -197,15 +201,15 @@ public:
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{
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lastPressureMeasure = timer;
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float Pressure = roundf(SensorPressure * pow(10, PressureDecimals)) / pow(10, PressureDecimals);
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float pressure = roundf(sensorPressure * pow(10, PressureDecimals)) / pow(10, PressureDecimals);
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if (Pressure != lastPressure)
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if (pressure != lastPressure || PublishAlways)
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{
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String topic = String(mqttDeviceTopic) + "/pressure";
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mqttPressurePub = mqtt->publish(topic.c_str(), 0, true, String(Pressure, PressureDecimals).c_str());
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mqttPressurePub = mqtt->publish(topic.c_str(), 0, true, String(pressure, PressureDecimals).c_str());
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}
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lastPressure = Pressure;
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lastPressure = pressure;
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}
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}
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}
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