implement tcs34725 light color sensor

platformio.ini

@@ -30,12 +30,16 @@ monitor_speed = 115200
 
 build_flags =
     -D SENSOR_BMP180
-    -D dataBMP180_temperature_minchange=0.2
-    -D dataBMP180_pressure_minchange=0.1
+    -D dataBMP180_temperature_minchange=0.5
+    -D dataBMP180_pressure_minchange=0.5
 
+    -D SENSOR_TCS34725
+    -D dataTCS34725_lux_minchange=20
+    -D dataTCS34725_colortemp_minchange=100
 
 lib_deps = 
     Adafruit BMP085 Library@1.1.0
+    https://github.com/adafruit/Adafruit_TCS34725
     ArduinoJson@6.16.1 #dependency of homie. using older version because of "ambiguous overload for operator|" error
     Homie@3.0.0
 
@@ -56,7 +60,7 @@ build_flags =
 
     -D SENSOR_BMP180
     -D dataBMP180_temperature_minchange=0.2
-    -D dataBMP180_pressure_minchange=0.1
+    -D dataBMP180_pressure_minchange=0.5
 
     -D SENSOR_PIR
     -D PIRPIN=D6

src/main.cpp

@@ -43,6 +43,7 @@ struct sensordata
 #ifdef SENSOR_BMP180
   //Connect SCL to D1, SDA to D2, GND and 3v3
   #include <Adafruit_BMP085.h>
+  bool bmp180init_ok=false;
   Adafruit_BMP085 bmp180;
   struct sensordata dataBMP180_temperature; //struct values are changed in setup()
   float value_temperatureBMP=0;
@@ -55,6 +56,7 @@ struct sensordata
   #include <Wire.h>
   #include <BH1750.h>
   BH1750 lightMeter(0x23);
+  bool bh1750init_ok=false;
   sensordata dataBH1750;
   float value_lightBH1750=0;
 #endif
@@ -150,15 +152,20 @@ struct sensordata
   void readSDS018();
 #endif
 
+#ifdef SENSOR_TCS34725
+  #include "Adafruit_TCS34725.h"
+  Adafruit_TCS34725 tcs = Adafruit_TCS34725(TCS34725_INTEGRATIONTIME_700MS, TCS34725_GAIN_1X);
+  bool tcs34725init_ok=false;
+  struct sensordata dataTCS34725_lux;
+  struct sensordata dataTCS34725_colortemp;
+  uint16_t value_colortemp, value_tcs_lux, value_tcs_r,value_tcs_g,value_tcs_b,value_tcs_c;
+
+  unsigned long lastread_tcs34725=0;
+#endif
+
 // data/homie/config.json hochladen mit platformio run --target uploadfs
 // config contains homie device name, mqtt ip and wifi credentials
 
-/*
-  float humidity; //[%RH]  DHT
-  float temperature; //[deg C]   DHT
-  float light; //[Lux]  BH1750
-  bool movement //true bei pir output hight, false wenn low   HC12?501?
-*/
 
 
 
@@ -194,6 +201,8 @@ void setup() {
     Serial.println("initializing bmp180");
     if (!bmp180.begin()){
       Serial.println("#ERROR: BMP180 init fail\n\n");
+    }else{
+      bmp180init_ok=true; //stays false if init failed, sensor will not be read in loop
     }
     #ifdef dataBMP180_temperature_minchange
       dataBMP180_temperature.minchange=dataBMP180_temperature_minchange;
@@ -208,6 +217,7 @@ void setup() {
     Wire.begin();  
     if (lightMeter.begin(BH1750::CONTINUOUS_HIGH_RES_MODE)) {
       Serial.println(F("BH1750 Advanced begin"));
+      bh1750init_ok=true;
     } else {
       Serial.println(F("Error initialising BH1750"));
     }
@@ -279,6 +289,21 @@ void setup() {
     #endif
   #endif
 
+  #ifdef SENSOR_TCS34725
+    Serial.println("initializing tcs34725");
+    if (!tcs.begin()) {
+      Serial.println("No TCS34725 found!");
+    }else{
+      tcs34725init_ok=true;
+    }
+    #ifdef dataTCS34725_lux_minchange
+      dataTCS34725_lux.minchange=dataTCS34725_lux_minchange;
+    #endif
+    #ifdef dataTCS34725_colortemp_minchange
+      dataTCS34725_colortemp.minchange=dataTCS34725_colortemp_minchange;
+    #endif
+  #endif
+
   
   //Homie_setFirmware(FW_NAME, FW_VERSION);
   //Homie_setBrand(FW_NAME);
@@ -324,6 +349,15 @@ void setup() {
     sensorNode.advertise("dust_pm25");
     sensorNode.advertise("dust_pm10");
   #endif
+
+  #ifdef SENSOR_TCS34725
+    #if defined(SENSOR_LDR) || defined(SENSOR_BH1750)
+      sensorNode.advertise("light_tcs");
+    #else
+      sensorNode.advertise("light");
+    #endif
+    sensorNode.advertise("colortemp");
+  #endif
   
 
   Serial.println("connecting..");
@@ -650,6 +684,74 @@ void loop_SDS018_pm10()
 }
 #endif
      
+#ifdef SENSOR_TCS34725
+void loop_TCS34725_lux()
+{
+  sensordata &d=dataTCS34725_lux;
+  
+  bool _changed=false;
+  if (millis() >= (d.lastreadtime+d.readdelay)) {
+    if (millis() >= (lastread_tcs34725+d.readdelay)) {
+      tcs.getRawData(&value_tcs_r, &value_tcs_g, &value_tcs_b, &value_tcs_c);
+    }
+    value_tcs_lux = tcs.calculateLux(value_tcs_r, value_tcs_g, value_tcs_b);
+
+    if (abs((int)d.lastsentvalue-value_tcs_lux)>=d.minchange){  //int abs
+      _changed=true;
+    }
+    d.lastreadtime=millis();
+  }
+
+  if (_changed || millis() >= (d.lastsent+d.senddelaymax)) {
+    Serial.print("Sending TCS Lux. reason=");
+    if (_changed) Serial.println("change"); else Serial.println("time");
+    checkESPStatus();
+
+    Homie.getLogger() << "light tcs " << ": " << value_tcs_lux << endl;
+    #if defined(SENSOR_LDR) || defined(SENSOR_BH1750)
+      sensorNode.setProperty("light_tcs").send(String(value_tcs_lux));
+    #else
+      sensorNode.setProperty("light").send(String(value_tcs_lux));
+    #endif
+    
+    d.lastsentvalue=value_tcs_lux;
+    
+    d.lastsent=millis();
+  }
+}
+void loop_TCS34725_colortemp()
+{
+  sensordata &d=dataTCS34725_colortemp;
+  
+  bool _changed=false;
+  if (millis() >= (d.lastreadtime+d.readdelay)) {
+    if (millis() >= (lastread_tcs34725+d.readdelay)) {
+      tcs.getRawData(&value_tcs_r, &value_tcs_g, &value_tcs_b, &value_tcs_c);
+    }
+    // colorTemp = tcs.calculateColorTemperature(r, g, b);
+    value_colortemp = tcs.calculateColorTemperature_dn40(value_tcs_r, value_tcs_g, value_tcs_b, value_tcs_c);
+    
+
+    if (abs((int)d.lastsentvalue-value_colortemp)>=d.minchange){ //int abs
+      _changed=true;
+    }
+    d.lastreadtime=millis();
+  }
+
+  if (_changed || millis() >= (d.lastsent+d.senddelaymax)) {
+    Serial.print("Sending TCS colortemp. reason=");
+    if (_changed) Serial.println("change"); else Serial.println("time");
+    checkESPStatus();
+
+    Homie.getLogger() << "colortemp tcs " << ": " << value_colortemp << endl;
+    sensorNode.setProperty("colortemp").send(String(value_colortemp));
+        
+    d.lastsentvalue=value_colortemp;
+    
+    d.lastsent=millis();
+  }
+}
+#endif
 
 
 void loopHandler() {
@@ -660,12 +762,16 @@ void loopHandler() {
   #endif
 
   #ifdef SENSOR_BMP180
-    loop_BMP180_temperature();
-    loop_BMP180_pressure();
+    if (bmp180init_ok) {
+      loop_BMP180_temperature();
+      loop_BMP180_pressure();
+    }
   #endif
 
   #ifdef SENSOR_BH1750
-    loop_BH1750();
+    if (bh1750init_ok) {
+      loop_BH1750();
+    }
   #endif
 
   #ifdef SENSOR_LDR
@@ -685,6 +791,13 @@ void loopHandler() {
     loop_SDS018_pm10();
   #endif 
 
+  #ifdef SENSOR_TCS34725
+    if (tcs34725init_ok) {
+      loop_TCS34725_lux();
+      loop_TCS34725_colortemp();
+    }
+  #endif
+
   
 
 }