add espsensor4 with mhz19

platformio.ini

@@ -12,9 +12,10 @@
 
 [platformio]
 #For Config upload comment in data_dir line and flash with platformio run -t uploadfs --environment sensorespx
-data_dir=data_sensoresp1
+#data_dir=data_sensoresp1
-#data_dir=data_sensoresp3
 
+#data_dir=data_sensoresp3
+data_dir=data_sensoresp4
 
 #Arbeitszimmer
 [env:sensoresp1]
@@ -82,3 +83,41 @@ lib_deps =
     adafruit/DHT sensor library@1.3.10
     BH1750@1.1.4
     Homie@3.0.0
+
+
+#Schlafzimmer
+[env:sensoresp4]
+platform = espressif8266
+board = d1_mini
+framework = arduino
+
+monitor_port = /dev/ttyUSB0
+monitor_speed = 115200
+
+build_flags =
+    -D SENSOR_DHT22
+    -D DHTPIN=D7
+    -D dataDHT22_temperature_minchange=0.1
+    -D dataDHT22_humidity_minchange=1.0
+
+    -D SENSOR_PIR
+    -D PIRPIN=D0
+    -D dataPIR_readdelay=100
+    -D dataPIR_senddelaymax=1000*60*10
+
+    -D SENSOR_BH1750
+    -D dataBH1750_minchange=10.0
+    -D dataBH1750_senddelaymax=1000*60*2
+
+    -D SENSOR_MHZ19
+    -D MHZ19_SERIAL_RX=D5
+    -D MHZ19_SERIAL_TX=D6
+    -D dataMHZ19_minchange=10
+    -D dataMHZ19_readdelay=10*1000
+
+lib_deps =
+    adafruit/DHT sensor library@1.3.10
+    BH1750@1.1.4
+    MHZ19@0.0.1
+    EspSoftwareSerial@6.8.1
+    Homie@3.0.0

src/main.cpp

@@ -1,7 +1,8 @@
 //#define DEBUG
 
 //Compile with platformio run --environment sensorespx
-//Spiffs data upload with: platformio run -t uploadfs --environment sensorespx
+//Compile and upload: platformio run --environment sensorespx -t upload
+//Spiffs data upload with (comment in data_dir line unter platformio section): platformio run --environment sensorespx -t uploadfs 
 
 /* DELETE BELOW
 // DHT22
@@ -26,7 +27,9 @@
 #define FW_NAME "sensoresp"  //gets printed on topic/$fw/name
 #define FW_VERSION "1.0.0"  //gets printed on topic/$fw/version
 
+#ifdef SENSOR_LDR
 int get_lux(const unsigned int* _in, const unsigned int* _out, byte size); //for analog ldr light calculation
+#endif
 
 struct sensordata
 {
@@ -73,8 +76,8 @@ struct sensordata
 
 
 #ifdef SENSOR_PIR
-// PIR Sensors HC-SR501 (modified to put out shortest pulse time)
+// PIR Sensors HC-SR501 (modified to put out shortest pulse time short pins 5 and 6 of ic)
- //pir sensor needs 5v. output level is 3.3v
+ //pir sensor needs 5v through an inductor for filtering. output level is 3.3v
   sensordata dataPIR;
   bool value_PIR=false;
 #endif
@@ -91,7 +94,28 @@ struct sensordata
   #endif
 #endif
 
+#ifdef SENSOR_MHZ19
+  struct sensordata dataMHZ19;
+  /*
+  * MHZ19 Library: https://platformio.org/lib/show/1620/SevSegSPI
+  * Software Serial Library: https://platformio.org/lib/show/168/EspSoftwareSerial
+  * SDS018 example: https://github.com/crystaldust/sds018/blob/master/sds018.ino
+  */
+  // SW Serial
+  //SW Serial RX: to mhz19 tx (green cable)
+  //SW Serial TX: to mhz19 rx (blue cable)
+  //co2 sensor needs 5v
 
+  #include <SoftwareSerial.h>
+
+  SoftwareSerial mhz19_swSerial;
+  #define BAUD_RATE_MHZ19 9600
+
+  #include <MHZ19.h>
+  MHZ19 mhz19;
+  bool mhz19_ready=false;
+  int value_co2=-1; //[ppm]
+#endif
 
 // data/homie/config.json hochladen mit platformio run --target uploadfs
 // config contains homie device name, mqtt ip and wifi credentials
@@ -186,6 +210,19 @@ void setup() {
     #endif
   #endif
 
+  #ifdef SENSOR_MHZ19
+    Serial.println("initializing mhz19");
+    #ifdef dataMHZ19_minchange
+      dataMHZ19.minchange=dataMHZ19_minchange;
+    #endif
+    #ifdef dataMHZ19_readdelay
+      dataMHZ19.readdelay=dataMHZ19_readdelay;
+    #endif
+    
+    mhz19_swSerial.begin(BAUD_RATE_MHZ19, SWSERIAL_8N1, MHZ19_SERIAL_RX, MHZ19_SERIAL_TX, false, 256);
+    mhz19.setSerial(&mhz19_swSerial);
+  #endif
+
   
   Homie_setFirmware(FW_NAME, FW_VERSION);
   Homie_setBrand(FW_NAME);
@@ -222,6 +259,10 @@ void setup() {
     sensorNode.advertise("pressure");
   #endif
 
+  #ifdef SENSOR_MHZ19
+    sensorNode.advertise("co2");
+  #endif
+  
 
   Serial.println("connecting..");
   Homie.setup();
@@ -442,6 +483,41 @@ void loop_PIR()
 }
 #endif
 
+#ifdef SENSOR_MHZ19
+void loop_MHZ19()
+{
+  sensordata &d=dataMHZ19;
+  
+  bool _changed=false;
+  if (millis() >= (d.lastreadtime+d.readdelay)) {
+    mhz19_ready=mhz19.isReady();
+    value_co2=mhz19.readValue(); //[ppm]
+    //Homie.getLogger() << "co2 " << ": " << value_co2 << " status=" << mhz19_ready << endl;
+    if (fabs(d.lastsentvalue-value_co2)>=d.minchange){
+      _changed=true;
+    }
+    d.lastreadtime=millis();
+  }
+
+  if (_changed || millis() >= (d.lastsent+d.senddelaymax)) {
+    Serial.print("Sending MHZ19. reason=");
+    if (_changed) Serial.println("change"); else Serial.println("time");
+    checkESPStatus();
+
+    Homie.getLogger() << "co2 " << ": " << value_co2 << endl;
+    if (mhz19_ready){ //send no co2 values if not warmed up. can take several miniutes
+      sensorNode.setProperty("co2").send(String(value_co2));
+    }else{
+      Homie.getLogger() << "co2 not ready. didnt sent" << endl;
+    }
+    
+    d.lastsentvalue=value_co2;
+    
+    d.lastsent=millis();
+  }
+}
+#endif
+
 
      
 
@@ -470,6 +546,10 @@ void loopHandler() {
     loop_PIR();
   #endif
 
+  #ifdef SENSOR_MHZ19
+    loop_MHZ19();
+  #endif
+
 
   
 
@@ -491,6 +571,7 @@ void checkESPStatus()
 // Calculate lux based on rawADC reading from LDR returns value in lux/10
 //////////////////////////////////////////////////////////////////////////////
 //quelle: https://groups.google.com/forum/#!topic/souliss/1kMAltPB2ME[1-25]
+#ifdef SENSOR_LDR
 int get_lux(const unsigned int* _in, const unsigned int* _out, byte size)
 {
  
@@ -521,3 +602,4 @@ int get_lux(const unsigned int* _in, const unsigned int* _out, byte size)
  // interpolate in the right segment for the rest
  return map(val, _in[pos-1], _in[pos], _out[pos-1], _out[pos]);
 }
+#endif