add bmp280

include/sensor_bmp280.h

@@ -0,0 +1,37 @@
+#ifndef SENSOR_BMP280_H
+#define SENSOR_BMP280_H
+
+#include "sensordata.h"
+#include <Homie.h>
+
+#include <Adafruit_BMP280.h>
+
+
+class Sensor_BMP280
+{
+    
+private:
+    Adafruit_BMP280 *bmp280;
+    HomieNode *sensorNode; //reference to HomieNode
+
+    struct sensordata data_temperature; //struct values are changed in setup()
+    struct sensordata data_pressure; //struct values are changed in setup()
+    
+    bool init_ok;
+
+public:
+    Sensor_BMP280();
+
+    void loop_BMP280_temperature();
+    void loop_BMP280_pressure();
+
+    void init();
+    void setSettings_Temperature(float minchange, unsigned long senddelaymax, unsigned long readdelay);
+    void setSettings_Pressure(float minchange, unsigned long senddelaymax, unsigned long readdelay);
+    void advertise(HomieNode& p_sensorNode);
+    void sensorloop();
+    
+};
+
+#endif
+

platformio.ini

@@ -379,13 +379,15 @@ build_flags =
     -D SENSOR_DHT22_temperature_minchange=0.2
     -D SENSOR_DHT22_humidity_minchange=2.0
 
-    -D SENSOR_BMP180
-    -D dataBMP180_temperature_minchange=0.2
-    -D dataBMP180_pressure_minchange=0.5
+    -D SENSOR_BMP280
+    -D PIN_SDA=D2
+    -D PIN_SCL=D1
+    -D dataBMP280_temperature_minchange=0.2
+    -D dataBMP280_pressure_minchange=0.5
 
 
 lib_deps = 
-    Adafruit BMP085 Library@1.1.0
+    adafruit/Adafruit BMP280 Library@^2.6.8
     DHT sensor library@1.3.10
     ArduinoJson@6.16.1 #dependency of homie. using older version because of "ambiguous overload for operator|" error
     Homie@3.0.0

src/main.cpp

@@ -82,6 +82,34 @@ HomieNode sensorNode("sensors", "Sensors","sensors");  //id, name, type
   #endif
 #endif
 
+
+#ifdef SENSOR_BMP280
+  #include "sensor_bmp280.h"
+  Sensor_BMP280 sensor_bmp280;
+
+  #ifndef SENSOR_BMP280_temperature_minchange
+    #define SENSOR_BMP280_temperature_minchange 0.2
+  #endif
+  #ifndef SENSOR_BMP280_temperature_senddelaymax
+    #define SENSOR_BMP280_temperature_senddelaymax 5*60*1000
+  #endif
+  #ifndef SENSOR_BMP280_temperature_readdelay
+    #define SENSOR_BMP280_temperature_readdelay 10000
+  #endif
+
+  #ifndef SENSOR_BMP280_pressure_minchange
+    #define SENSOR_BMP280_pressure_minchange 0.5
+  #endif
+  #ifndef SENSOR_BMP280_pressure_senddelaymax
+    #define SENSOR_BMP280_pressure_senddelaymax 30*60*1000
+  #endif
+  #ifndef SENSOR_BMP280_pressure_readdelay
+    #define SENSOR_BMP280_pressure_readdelay 10000
+  #endif
+#endif
+
+
+
 #ifdef SENSOR_HTU21D
   #include "sensor_htu21d.h"
   Sensor_HTU21D sensor_htu21d;
@@ -454,6 +482,13 @@ void setup() {
     sensor_bmp180.setSettings_Pressure(SENSOR_BMP180_temperature_minchange,SENSOR_BMP180_temperature_senddelaymax,SENSOR_BMP180_temperature_readdelay);
   #endif
 
+  
+  #ifdef SENSOR_BMP280
+    sensor_bmp280.init();
+    sensor_bmp280.setSettings_Temperature(SENSOR_BMP280_temperature_minchange,SENSOR_BMP280_temperature_senddelaymax,SENSOR_BMP280_temperature_readdelay);
+    sensor_bmp280.setSettings_Pressure(SENSOR_BMP280_temperature_minchange,SENSOR_BMP280_temperature_senddelaymax,SENSOR_BMP280_temperature_readdelay);
+  #endif
+
   #ifdef SENSOR_HTU21D
     sensor_htu21d.init();
     sensor_htu21d.setSettings_Temperature(SENSOR_HTU21D_temperature_minchange,SENSOR_HTU21D_temperature_senddelaymax,SENSOR_HTU21D_temperature_readdelay);
@@ -563,6 +598,10 @@ void setup() {
     sensor_bmp180.advertise(sensorNode);
   #endif
 
+  #ifdef SENSOR_BMP280
+    sensor_bmp280.advertise(sensorNode);
+  #endif
+
   #ifdef SENSOR_HTU21D
     sensor_htu21d.advertise(sensorNode);
   #endif
@@ -648,6 +687,10 @@ void loopHandler() {
     sensor_bmp180.sensorloop();
   #endif
 
+  #ifdef SENSOR_BMP280
+    sensor_bmp280.sensorloop();
+  #endif
+
   #ifdef SENSOR_HTU21D
     sensor_htu21d.sensorloop();
   #endif

src/sensor_bmp280.cpp

@@ -0,0 +1,115 @@
+#ifdef SENSOR_BMP280
+//Connect SCL to D1, SDA to D2, GND and 3v3
+#include "sensor_bmp280.h"
+
+
+
+Sensor_BMP280::Sensor_BMP280()
+{
+    bmp280 = new Adafruit_BMP280();
+}
+
+void Sensor_BMP280::init() //Things to be done during setup()
+{    
+    Serial.println("initializing bmp280");
+    if (!bmp280->begin(0x76)){
+      Serial.println("#ERROR: bmp280 init fail\n");
+    }else{
+      init_ok=true; //stays false if init failed, sensor will not be read in loop
+
+      bmp280->setSampling(Adafruit_BMP280::MODE_NORMAL,     /* Operating Mode. */
+                  Adafruit_BMP280::SAMPLING_X2,     /* Temp. oversampling */
+                  Adafruit_BMP280::SAMPLING_X16,    /* Pressure oversampling */
+                  Adafruit_BMP280::FILTER_X16,      /* Filtering. */
+                  Adafruit_BMP280::STANDBY_MS_500); /* Standby time. */
+    }
+}
+
+//Also called during setup()
+void Sensor_BMP280::setSettings_Temperature(float minchange, unsigned long senddelaymax, unsigned long readdelay)
+{
+    data_temperature.minchange=minchange;
+    data_temperature.senddelaymax=senddelaymax;
+    data_temperature.readdelay=readdelay;
+}
+
+//Also called during setup()
+void Sensor_BMP280::setSettings_Pressure(float minchange, unsigned long senddelaymax, unsigned long readdelay)
+{
+    data_pressure.minchange=minchange;
+    data_pressure.senddelaymax=senddelaymax;
+    data_pressure.readdelay=readdelay;
+}
+
+//Called during setup
+void Sensor_BMP280::advertise(HomieNode& p_sensorNode)
+{
+    sensorNode = &p_sensorNode;
+    sensorNode->advertise("temperature");
+    sensorNode->advertise("pressure");
+}
+
+void Sensor_BMP280::sensorloop()
+{
+  if (init_ok) {
+    loop_BMP280_temperature();
+    loop_BMP280_pressure();
+  }
+}
+
+void Sensor_BMP280::loop_BMP280_temperature()
+{
+  sensordata &d=data_temperature;
+  bool _changed=false;  
+
+  if (millis() >= (d.lastreadtime+d.readdelay)) {
+    d.value = bmp280->readTemperature();
+    if (fabs(d.lastsentvalue-d.value)>=d.minchange){
+      _changed=true;
+    }
+    d.lastreadtime=millis();
+  }
+
+  if (_changed || millis() >= (d.lastsent+d.senddelaymax)) {
+    Serial.print("Sending bmp280_temperature. reason=");
+    if (_changed) Serial.println("change"); else Serial.println("time");
+    
+
+    if (!(isnan(d.value) == 1)){ //success
+      sensorNode->setProperty("temperature").send(String(d.value));
+      Homie.getLogger() << "temperature " << ": " << d.value << endl;    
+      d.lastsentvalue=d.value;
+    }
+
+    d.lastsent=millis();
+  }
+}
+
+void Sensor_BMP280::loop_BMP280_pressure()
+{
+  sensordata &d=data_pressure;
+  bool _changed=false;
+  
+  if (millis() >= (d.lastreadtime+d.readdelay)) {
+    d.value = bmp280->readPressure()/100.0;
+    if (fabs(d.lastsentvalue-d.value)>=d.minchange){
+      _changed=true;
+    }
+    d.lastreadtime=millis();
+  }
+
+  if (_changed || millis() >= (d.lastsent+d.senddelaymax)) {
+    Serial.print("Sending bmp280_pressure. reason=");
+    if (_changed) Serial.println("change"); else Serial.println("time");
+
+    if (!(isnan(d.value) == 1)){ //success
+      Homie.getLogger() << "pressure " << ": " << d.value << endl;
+      sensorNode->setProperty("pressure").send(String(d.value));
+      d.lastsentvalue=d.value;
+    }
+    d.lastsent=millis();
+  }
+}
+
+
+#endif