add bme680

platformio.ini

@@ -36,6 +36,7 @@ lib_deps =
 ;    https://github.com/wemos/LOLIN_EPD_Library
     Adafruit GFX Library
     Adafruit BME280 Library
+    Adafruit BME680 Library
     Adafruit Unified Sensor
     Adafruit BusIO
     Adafruit VEML6075 Library

src/main.cpp

@@ -20,6 +20,7 @@
 
 #include <Adafruit_Sensor.h>
 #include "Adafruit_BME280.h"
+#include "Adafruit_BME680.h"
 
 #include "Adafruit_VEML6075.h"
 
@@ -39,7 +40,8 @@ static const char* TAG = "MAIN";
 
 WiFiMulti wifiMulti;
 GxEPD2_BW<GxEPD2_213_B72, GxEPD2_213_B72::HEIGHT> display(GxEPD2_213_B72(/*CS=SS*/ TFT_CS, /*DC=*/ TFT_DC, /*RST=*/ TFT_RST, /*BUSY=*/ -1)); // GDEH0213B72
-Adafruit_BME280 bme; // I2C (also available: hardware SPI
+Adafruit_BME280 bme280; // I2C (also available: hardware SPI
+Adafruit_BME680 bme680; // I2C (also available: hardware SPI
 //HardwareSerial Serial2(2);
 SdsDustSensor sds(Serial2);
 Adafruit_VEML6075 uv = Adafruit_VEML6075();
@@ -48,7 +50,8 @@ XD0OTA ota("esp32-weatherstation");
 XD0MQTT mqtt;
 
 uint32_t lastDisplayUpdate = 0;
-bool bme_active = false;
+bool bme280_active = false;
+bool bme680_active = false;
 bool uv_active = false;
 bool sds_active = false;
 
@@ -102,23 +105,45 @@ void getTime(char* ptr, size_t maxsize, const char* format) {
 
 
 void printValues() {
-  if (bme_active) {
+  if (bme280_active) {
     #define SEALEVELPRESSURE_HPA (1013.25)
     Serial.print("Temperature = ");
-    Serial.print(bme.readTemperature());
+    Serial.print(bme280.readTemperature());
     Serial.println(" *C");
 
     Serial.print("Pressure = ");
 
-    Serial.print(bme.readPressure() / 100.0F);
+    Serial.print(bme280.readPressure() / 100.0F);
     Serial.println(" hPa");
 
     Serial.print("Approx. Altitude = ");
-    Serial.print(bme.readAltitude(SEALEVELPRESSURE_HPA));
+    Serial.print(bme280.readAltitude(SEALEVELPRESSURE_HPA));
     Serial.println(" m");
 
     Serial.print("Humidity = ");
-    Serial.print(bme.readHumidity());
+    Serial.print(bme280.readHumidity());
+    Serial.println(" %");
+
+    Serial.println();
+  }
+
+  if (bme680_active) {
+    #define SEALEVELPRESSURE_HPA (1013.25)
+    Serial.print("Temperature = ");
+    Serial.print(bme680.readTemperature());
+    Serial.println(" *C");
+
+    Serial.print("Pressure = ");
+
+    Serial.print(bme680.readPressure() / 100.0F);
+    Serial.println(" hPa");
+
+    Serial.print("Approx. Altitude = ");
+    Serial.print(bme680.readAltitude(SEALEVELPRESSURE_HPA));
+    Serial.println(" m");
+
+    Serial.print("Humidity = ");
+    Serial.print(bme680.readHumidity());
     Serial.println(" %");
 
     Serial.println();
@@ -150,16 +175,30 @@ void printValues() {
 
 void sendValues() {
     /* send values MQTT */
-  if (bme_active) {
+  if (bme280_active) {
+    String topic_temperature = String("thomas/sensor/") + ota.getMAC() + String("/temperature");
+    String topic_humidity = String("thomas/sensor/") + ota.getMAC() + String("/humidity");
+    String topic_pressure = String("thomas/sensor/") + ota.getMAC() + String("/pressure");
+    char temperature[8]; sprintf(temperature, "%.2f", bme280.readTemperature());
+    char humidity[7]; sprintf(humidity, "%.2f", bme280.readHumidity());
+    char pressure[8]; sprintf(pressure, "%.2f", bme280.readPressure() / 100.0F);
+    mqtt.publish(topic_temperature.c_str(), temperature, strlen(temperature));
+    mqtt.publish(topic_humidity.c_str(), humidity, strlen(humidity));
+    mqtt.publish(topic_pressure.c_str(), pressure, strlen(pressure));
+  } else if (bme680_active) {
+    bme680.performReading();
     String topic_temperature = String("thomas/sensor/") + ota.getMAC() + String("/temperature");
     String topic_humidity = String("thomas/sensor/") + ota.getMAC() + String("/humidity");
     String topic_pressure = String("thomas/sensor/") + ota.getMAC() + String("/pressure");
-    char temperature[8]; sprintf(temperature, "%.2f", bme.readTemperature());
+    String topic_voc = String("thomas/sensor/") + ota.getMAC() + String("/voc");
-    char humidity[7]; sprintf(humidity, "%.2f", bme.readHumidity());
+    char temperature[8]; sprintf(temperature, "%.2f", bme680.readTemperature());
-    char pressure[8]; sprintf(pressure, "%.2f", bme.readPressure() / 100.0F);
+    char humidity[7]; sprintf(humidity, "%.2f", bme680.readHumidity());
+    char pressure[8]; sprintf(pressure, "%.2f", bme680.readPressure() / 100.0F);
+    char voc[12]; sprintf(voc, "%.2f", bme680.gas_resistance / 1000.0F);
     mqtt.publish(topic_temperature.c_str(), temperature, strlen(temperature));
     mqtt.publish(topic_humidity.c_str(), humidity, strlen(humidity));
     mqtt.publish(topic_pressure.c_str(), pressure, strlen(pressure));
+    mqtt.publish(topic_voc.c_str(), voc, strlen(voc));
   } else {
     String topic_temperature = String("thomas/sensor/") + ota.getMAC() + String("/temperature");
     float esp32_temperature = (temprature_sens_read() - 32) / 1.8;
@@ -220,19 +259,25 @@ void setup()
   #define BME_SDA 21
   #define BME_SCL 22
   Wire.begin(BME_SDA, BME_SCL);
-  if (bme.begin()) {
+  if (bme280.begin()) {
-    bme_active = true;
+    bme280_active = true;
   } else {
     ESP_LOGE(TAG, "Could not find a valid BME280 sensor, check wiring!");
   }
-/*
+  if (bme680.begin()) {
+    bme680_active = true;
+  } else {
+    ESP_LOGE(TAG, "Could not find a valid BME680 sensor, check wiring!");
+  }
+
+  if (bme680_active) {
     // Set up oversampling and filter initialization
-  bme.setTemperatureOversampling(BME680_OS_8X);
+    bme680.setTemperatureOversampling(BME680_OS_8X);
-  bme.setHumidityOversampling(BME680_OS_2X);
+    bme680.setHumidityOversampling(BME680_OS_2X);
-  bme.setPressureOversampling(BME680_OS_4X);
+    bme680.setPressureOversampling(BME680_OS_4X);
-  bme.setIIRFilterSize(BME680_FILTER_SIZE_3);
+    bme680.setIIRFilterSize(BME680_FILTER_SIZE_3);
-  bme.setGasHeater(320, 150); // 320*C for 150 ms
+    bme680.setGasHeater(320, 150); // 320*C for 150 ms
-*/
+  }
 
   if (uv.begin()) {
     uv_active = true;
@@ -307,22 +352,38 @@ void loop()
     {
       display.fillScreen(GxEPD_WHITE);
       display.setTextColor(GxEPD_BLACK);
-      display.setFont(&FreeSans9pt7b);
       display.setTextWrap(false);
       display.setCursor(0, 11);
+      display.setFont(&FreeSans9pt7b);
       display.println("ESP32-Wetterstation");
       display.drawFastHLine(0, 14, display.width(), GxEPD_BLACK);
       display.setCursor(0, 32);
-      if (bme_active) {
+      if (bme280_active) {
+        display.print("Temperatur: ");
+        display.print(bme280.readTemperature());
+        display.println(" *C");
+        display.print("Luftfeuchte: ");
+        display.print(bme280.readHumidity());
+        display.println(" %");
+        display.print("Luftdruck:");
+        display.print(bme280.readPressure() / 100.0F);
+        display.println(" hPa");
+      } else if (bme680_active) {
+        if (! bme680.performReading()) {
+          Serial.println("Failed to perform reading :(");
+      }
         display.print("Temperatur: ");
-        display.print(bme.readTemperature());
+        display.print(bme680.readTemperature());
         display.println(" *C");
         display.print("Luftfeuchte: ");
-        display.print(bme.readHumidity());
+        display.print(bme680.readHumidity());
         display.println(" %");
         display.print("Luftdruck: ");
-        display.print(bme.readPressure() / 100.0F);
+        display.print(bme680.readPressure() / 100.0F);
         display.println(" hPa");
+        display.print("Gas: ");
+        display.print(bme680.gas_resistance / 1000.0);
+        display.println(" KOhms");
       } else {
         display.print("Temperatur: ");
         float esp32_temperature = (temprature_sens_read() - 32) / 1.8;