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Merge pull request #1886 from betaphi/BME280_Patch

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Usermod BME280_v2 refinement
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Aircoookie 2021-04-12 11:07:22 +02:00 committed by GitHub
commit c4201d9a2a
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1 changed files with 45 additions and 41 deletions
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86
usermods/BME280_v2/usermod_bme280.h
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@ -12,10 +12,11 @@ private:
// User-defined configuration // User-defined configuration
#define Celsius // Show temperature mesaurement in Celcius. Comment out for Fahrenheit #define Celsius // Show temperature mesaurement in Celcius. Comment out for Fahrenheit
#define TemperatureDecimals 1 // Number of decimal places in published temperaure values #define TemperatureDecimals 1 // Number of decimal places in published temperaure values
#define HumidityDecimals 0 // Number of decimal places in published humidity values #define HumidityDecimals 2 // Number of decimal places in published humidity values
#define PressureDecimals 2 // Number of decimal places in published pressure values #define PressureDecimals 2 // Number of decimal places in published pressure values
#define TemperatureInterval 5 // Interval to measure temperature (and humidity, dew point if available) in seconds #define TemperatureInterval 5 // Interval to measure temperature (and humidity, dew point if available) in seconds
#define PressureInterval 300 // Interval to measure pressure in seconds #define PressureInterval 300 // Interval to measure pressure in seconds
#define PublishAlways 0 // Publish values even when they have not changed
// Sanity checks // Sanity checks
#if !defined(TemperatureDecimals) || TemperatureDecimals < 0 #if !defined(TemperatureDecimals) || TemperatureDecimals < 0
@ -33,6 +34,9 @@ private:
#if !defined(PressureInterval) || PressureInterval < 0 #if !defined(PressureInterval) || PressureInterval < 0
#define PressureInterval TemperatureInterval #define PressureInterval TemperatureInterval
#endif #endif
#if !defined(PublishAlways)
#define PublishAlways 0
#endif
#ifdef ARDUINO_ARCH_ESP32 // ESP32 boards #ifdef ARDUINO_ARCH_ESP32 // ESP32 boards
uint8_t SCL_PIN = 22; uint8_t SCL_PIN = 22;
@ -58,7 +62,7 @@ private:
BME280I2C bme{settings}; BME280I2C bme{settings};
uint8_t SensorType; uint8_t sensorType;
// Measurement timers // Measurement timers
long timer; long timer;
@ -66,11 +70,11 @@ private:
long lastPressureMeasure = 0; long lastPressureMeasure = 0;
// Current sensor values // Current sensor values
float SensorTemperature; float sensorTemperature;
float SensorHumidity; float sensorHumidity;
float SensorHeatIndex; float sensorHeatIndex;
float SensorDewPoint; float sensorDewPoint;
float SensorPressure; float sensorPressure;
// Track previous sensor values // Track previous sensor values
float lastTemperature; float lastTemperature;
float lastHumidity; float lastHumidity;
@ -96,13 +100,13 @@ private:
bme.read(_pressure, _temperature, _humidity, tempUnit, presUnit); bme.read(_pressure, _temperature, _humidity, tempUnit, presUnit);
SensorTemperature = _temperature; sensorTemperature = _temperature;
SensorHumidity = _humidity; sensorHumidity = _humidity;
SensorPressure = _pressure; sensorPressure = _pressure;
if (SensorType == 1) if (sensorType == 1)
{ {
SensorHeatIndex = EnvironmentCalculations::HeatIndex(_temperature, _humidity, envTempUnit); sensorHeatIndex = EnvironmentCalculations::HeatIndex(_temperature, _humidity, envTempUnit);
SensorDewPoint = EnvironmentCalculations::DewPoint(_temperature, _humidity, envTempUnit); sensorDewPoint = EnvironmentCalculations::DewPoint(_temperature, _humidity, envTempUnit);
} }
} }
@ -113,7 +117,7 @@ public:
if (!bme.begin()) if (!bme.begin())
{ {
SensorType = 0; sensorType = 0;
Serial.println("Could not find BME280I2C sensor!"); Serial.println("Could not find BME280I2C sensor!");
} }
else else
@ -121,15 +125,15 @@ public:
switch (bme.chipModel()) switch (bme.chipModel())
{ {
case BME280::ChipModel_BME280: case BME280::ChipModel_BME280:
SensorType = 1; sensorType = 1;
Serial.println("Found BME280 sensor! Success."); Serial.println("Found BME280 sensor! Success.");
break; break;
case BME280::ChipModel_BMP280: case BME280::ChipModel_BMP280:
SensorType = 2; sensorType = 2;
Serial.println("Found BMP280 sensor! No Humidity available."); Serial.println("Found BMP280 sensor! No Humidity available.");
break; break;
default: default:
SensorType = 0; sensorType = 0;
Serial.println("Found UNKNOWN sensor! Error!"); Serial.println("Found UNKNOWN sensor! Error!");
} }
} }
@ -139,7 +143,7 @@ public:
{ {
// BME280 sensor MQTT publishing // BME280 sensor MQTT publishing
// Check if sensor present and MQTT Connected, otherwise it will crash the MCU // Check if sensor present and MQTT Connected, otherwise it will crash the MCU
if (SensorType != 0 && mqtt != nullptr) if (sensorType != 0 && mqtt != nullptr)
{ {
// Timer to fetch new temperature, humidity and pressure data at intervals // Timer to fetch new temperature, humidity and pressure data at intervals
timer = millis(); timer = millis();
@ -148,48 +152,48 @@ public:
{ {
lastTemperatureMeasure = timer; lastTemperatureMeasure = timer;
UpdateBME280Data(SensorType); UpdateBME280Data(sensorType);
float Temperature = roundf(SensorTemperature * pow(10, TemperatureDecimals)) / pow(10, TemperatureDecimals); float temperature = roundf(sensorTemperature * pow(10, TemperatureDecimals)) / pow(10, TemperatureDecimals);
float Humidity, HeatIndex, DewPoint; float humidity, heatIndex, dewPoint;
// If temperature has changed since last measure, create string populated with device topic // If temperature has changed since last measure, create string populated with device topic
// from the UI and values read from sensor, then publish to broker // from the UI and values read from sensor, then publish to broker
if (Temperature != lastTemperature) if (temperature != lastTemperature || PublishAlways)
{ {
String topic = String(mqttDeviceTopic) + "/temperature"; String topic = String(mqttDeviceTopic) + "/temperature";
mqttTemperaturePub = mqtt->publish(topic.c_str(), 0, false, String(Temperature, TemperatureDecimals).c_str()); mqttTemperaturePub = mqtt->publish(topic.c_str(), 0, false, String(temperature, TemperatureDecimals).c_str());
} }
lastTemperature = Temperature; // Update last sensor temperature for next loop lastTemperature = temperature; // Update last sensor temperature for next loop
if (SensorType == 1) // Only if sensor is a BME280 if (sensorType == 1) // Only if sensor is a BME280
{ {
Humidity = roundf(SensorHumidity * pow(10, HumidityDecimals)) / pow(10, HumidityDecimals); humidity = roundf(sensorHumidity * pow(10, HumidityDecimals)) / pow(10, HumidityDecimals);
HeatIndex = roundf(SensorHeatIndex * pow(10, TemperatureDecimals)) / pow(10, TemperatureDecimals); heatIndex = roundf(sensorHeatIndex * pow(10, TemperatureDecimals)) / pow(10, TemperatureDecimals);
DewPoint = roundf(SensorDewPoint * pow(10, TemperatureDecimals)) / pow(10, TemperatureDecimals); dewPoint = roundf(sensorDewPoint * pow(10, TemperatureDecimals)) / pow(10, TemperatureDecimals);
if (Humidity != lastHumidity) if (humidity != lastHumidity || PublishAlways)
{ {
String topic = String(mqttDeviceTopic) + "/humidity"; String topic = String(mqttDeviceTopic) + "/humidity";
mqtt->publish(topic.c_str(), 0, false, String(Humidity, HumidityDecimals).c_str()); mqtt->publish(topic.c_str(), 0, false, String(humidity, HumidityDecimals).c_str());
} }
if (HeatIndex != lastHeatIndex) if (heatIndex != lastHeatIndex || PublishAlways)
{ {
String topic = String(mqttDeviceTopic) + "/heat_index"; String topic = String(mqttDeviceTopic) + "/heat_index";
mqtt->publish(topic.c_str(), 0, false, String(HeatIndex, TemperatureDecimals).c_str()); mqtt->publish(topic.c_str(), 0, false, String(heatIndex, TemperatureDecimals).c_str());
} }
if (DewPoint != lastDewPoint) if (dewPoint != lastDewPoint || PublishAlways)
{ {
String topic = String(mqttDeviceTopic) + "/dew_point"; String topic = String(mqttDeviceTopic) + "/dew_point";
mqtt->publish(topic.c_str(), 0, false, String(DewPoint, TemperatureDecimals).c_str()); mqtt->publish(topic.c_str(), 0, false, String(dewPoint, TemperatureDecimals).c_str());
} }
lastHumidity = Humidity; lastHumidity = humidity;
lastHeatIndex = HeatIndex; lastHeatIndex = heatIndex;
lastDewPoint = DewPoint; lastDewPoint = dewPoint;
} }
} }
@ -197,15 +201,15 @@ public:
{ {
lastPressureMeasure = timer; lastPressureMeasure = timer;
float Pressure = roundf(SensorPressure * pow(10, PressureDecimals)) / pow(10, PressureDecimals); float pressure = roundf(sensorPressure * pow(10, PressureDecimals)) / pow(10, PressureDecimals);
if (Pressure != lastPressure) if (pressure != lastPressure || PublishAlways)
{ {
String topic = String(mqttDeviceTopic) + "/pressure"; String topic = String(mqttDeviceTopic) + "/pressure";
mqttPressurePub = mqtt->publish(topic.c_str(), 0, true, String(Pressure, PressureDecimals).c_str()); mqttPressurePub = mqtt->publish(topic.c_str(), 0, true, String(pressure, PressureDecimals).c_str());
} }
lastPressure = Pressure; lastPressure = pressure;
} }
} }
} }