separate sensors into ifdef blocks

src/main.cpp

@@ -1,14 +1,72 @@
 //#define DEBUG
 
+// DHT22
+#define SENSOR_DHT22
+#define DHTPIN D7     // Digital pin connected to the DHT sensor
+
+// PIR Sensors HC-SR501 (modified to put out shortest pulse time)
+#define SENSOR_PIR
+#define PIRPIN D6  //pir sensor needs 5v. output level is 3.3v
+
+//BH1750 Lux Sensor
+#define SENSOR_BH1750
+
+
+//GPIO2 is blue led on wemos_d1
+
 
 #include "Arduino.h"
 
-#include <Adafruit_Sensor.h> //required for dht library
+#include <Homie.h>
-#include <DHT.h>
+#define FW_NAME "sensoresp"  //gets printed on topic/$fw/name
-#include <Wire.h>
+#define FW_VERSION "1.0.0"  //gets printed on topic/$fw/version
-#include <BH1750.h>
+
+/*
+struct sensordata
+{
+  unsigned long lastDHT22time=0;
+  unsigned long readdelay_DHT22=1000*30; //polling delay
+  float minchange_DHT22=0.2;//send new value if difference to last sent value is greater than this
+  unsigned long lastsend_DHT22=0;
+  unsigned long senddelaymax_DHT22=1000*60*10; //maximum time until current value is send
+}
+*/
+
+
+#ifdef SENSOR_DHT22
+  #include <Adafruit_Sensor.h> //required for dht library
+  #include <DHT.h>
+  DHT dht(DHTPIN,DHT22,11); //default:11
+  unsigned long lastDHT22time=0;
+  unsigned long readdelay_DHT22=1000*30; //polling delay
+  float minchange_DHT22=0.2;//send new value if difference to last sent value is greater than this
+  unsigned long lastsend_DHT22=0;
+  unsigned long senddelaymax_DHT22=1000*60*10; //maximum time until current value is send
+  
+#endif
+
+#ifdef SENSOR_BH1750
+  #include <Wire.h>
+  #include <BH1750.h>
+  BH1750 lightMeter(0x23);
+  unsigned long lastBH1750time=0;
+  unsigned long readdelay_BH1750=2000; //polling delay
+  unsigned long lastsend_BH1750=0;
+  unsigned long senddelaymax_BH1750=1000*60*10; //maximum time until current value is send
+#endif
+
+
+#ifdef SENSOR_PIR
+  unsigned long lastPIRtime=0;
+  unsigned long readdelay_PIR=100; //polling delay
+  unsigned long lastsend_PIR=0;
+  unsigned long senddelaymax_PIR=1000*60*10; //maximum time until current value is send
+  bool motion=false;
+#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
@@ -19,56 +77,40 @@
 
 
 
-//GPIO2 is blue led
-#define DHTPIN D7     // Digital pin connected to the DHT sensor
-//DHT dht(13,DHT22,11); //default:11
-DHT dht(DHTPIN,DHT22,11); //default:11
-
-#define PIRPIN D6  //pir sensor needs 5v. output level is 3.3v
-
-BH1750 lightMeter(0x23);
-
-//timings
-unsigned long lastsensorreadtime=0;
-unsigned long sensorupdatedelay=60000; //delay for reading and transmitting
-unsigned long lastPIRtime=0;
-unsigned long PIRdelay=100; //polling delay
-unsigned long lastPIRSendValueTime=0;
-unsigned long PIRMaxDelay=1000*60*10; //maximum time until current value is send
-bool motion=false;
-
-
-#include <Homie.h>
-#define FW_NAME "sensoresp3"
-#define FW_VERSION "1.0.0"
-
-
-
-HomieNode sensorNode("sensors", "Sensors","sensors");
 
+HomieNode sensorNode("sensors", "Sensors","sensors");  //id, name, type
 
 char tempstring[16]; //for dtostrf
 
 
 void loopHandler();
+void checkESPStatus();
 
 void setup() {
   Serial.begin(115200);
   Serial.println();
-  Serial.println("Welcome");
+  Serial.println("Booting");
 
-  pinMode(PIRPIN, INPUT_PULLUP);
 
-  Serial.println("initializing dht");
+  #ifdef SENSOR_DHT22
-  dht.begin(); // dht pins: 1=power, 2=data, 3=NC, 4=GND. 10k from data to power needed 
+    Serial.println("initializing dht");
+    dht.begin(); // dht pins: 1=power, 2=data, 3=NC, 4=GND. 10k from data to power needed 
+  #endif
 
-  Serial.println("initializing bh1750");
+  #ifdef SENSOR_BH1750
-  Wire.begin();  //initialize i2c. SDA=D2, SCL=D1
+    Serial.println("initializing bh1750");
-  if (lightMeter.begin(BH1750::CONTINUOUS_HIGH_RES_MODE)) {
+    Wire.begin();  //initialize i2c. SDA=D2, SCL=D1
-    Serial.println(F("BH1750 Advanced begin"));
+    if (lightMeter.begin(BH1750::CONTINUOUS_HIGH_RES_MODE)) {
-  } else {
+      Serial.println(F("BH1750 Advanced begin"));
-    Serial.println(F("Error initialising BH1750"));
+    } else {
-  }
+      Serial.println(F("Error initialising BH1750"));
+    }
+  #endif
+
+
+  #ifdef SENSOR_PIR
+    pinMode(PIRPIN, INPUT_PULLUP);
+  #endif
 
   Serial.println("connecting..");
   
@@ -77,62 +119,37 @@ void setup() {
   Homie.setLoopFunction(loopHandler);
 
 
-  sensorNode.advertise("temperature");
+  #ifdef SENSOR_DHT22
-  sensorNode.advertise("humidity");
+    sensorNode.advertise("temperature");
-  sensorNode.advertise("light");
+    sensorNode.advertise("humidity");
-  sensorNode.advertise("motion");
+  #endif
+
+  #ifdef SENSOR_BH1750
+    sensorNode.advertise("light");
+  #endif
+
+
+  #ifdef SENSOR_PIR
+    sensorNode.advertise("motion");
+  #endif
   
 
   Homie.setup();
   Serial.println("connected"); //wird nicht ausgegeben. keine ahnung warum.
-
 }
 
 void loop() {
   Homie.loop();  
 }
 
-void loopHandler() {
 
-  if (millis() >= (lastPIRtime+PIRdelay)){     
+#ifdef SENSOR_DHT22
-     if (digitalRead(PIRPIN)){
+void loop_DHT22()
-       if (!motion) { //changed?
+{
-        Homie.getLogger() << "motion " << ": " << "true" << endl;
+  if (millis() >= (lastDHT22time+readdelay_DHT22))
-        sensorNode.setProperty("motion").send(String("true"));
-       }
-       motion=true;
-       lastPIRSendValueTime=millis();
-     }else{
-       if (motion) { //changed?
-        Homie.getLogger() << "motion " << ": " << "false" << endl;
-        sensorNode.setProperty("motion").send(String("false"));
-       }
-       motion=false;
-       lastPIRSendValueTime=millis();
-     }
-     lastPIRtime=millis();
-  }
-  if (millis() >= (lastPIRSendValueTime+PIRMaxDelay)) { //send current value after some long time
-    if (digitalRead(PIRPIN)){
-       Homie.getLogger() << "motion resend " << ": " << "true" << endl;
-       sensorNode.setProperty("motion").send(String("true"));
-       motion=true;
-     }else{
-       Homie.getLogger() << "motion resend " << ": " << "false" << endl;
-       sensorNode.setProperty("motion").send(String("false"));
-       motion=false;
-     }
-     lastPIRSendValueTime=millis();
-  }
-
-  if (millis() >= (lastsensorreadtime+sensorupdatedelay))
   {
     Serial.println("Sending");
-
+    checkESPStatus();
-    if (WiFi.status() != WL_CONNECTED) //restart if wifi signal loss
-    {
-      ESP.reset();
-    }
 
 
     float temperatureDHT = dht.readTemperature();
@@ -148,13 +165,93 @@ void loopHandler() {
     }
     
 
+    lastDHT22time=millis();
+  }
+}
+#endif
+
+#ifdef SENSOR_BH1750
+void loop_BH1750()
+{
+  if (millis() >= (lastBH1750time+readdelay_BH1750))
+  {
+    Serial.println("Sending");
+    checkESPStatus();
 
     float light = lightMeter.readLightLevel(); // [lux]
     Homie.getLogger() << "light " << ": " << light << endl;
     sensorNode.setProperty("light").send(String(light));
 
-
+    lastBH1750time=millis();
-
+  }
-    lastsensorreadtime=millis();
+}
+#endif
+
+#ifdef SENSOR_PIR
+void loop_PIR()
+{
+  if (millis() >= (lastPIRtime+readdelay_PIR)){     
+     if (digitalRead(PIRPIN)){
+       if (!motion) { //changed?
+        Homie.getLogger() << "motion " << ": " << "true" << endl;
+        sensorNode.setProperty("motion").send(String("true"));
+       }
+       motion=true;
+       lastsend_PIR=millis();
+     }else{
+       if (motion) { //changed?
+        Homie.getLogger() << "motion " << ": " << "false" << endl;
+        sensorNode.setProperty("motion").send(String("false"));
+       }
+       motion=false;
+       lastsend_PIR=millis();
+     }
+     lastPIRtime=millis();
+  }
+  if (millis() >= (lastsend_PIR+senddelaymax_PIR)) { //send current value after some long time
+    if (digitalRead(PIRPIN)){
+       Homie.getLogger() << "motion resend " << ": " << "true" << endl;
+       sensorNode.setProperty("motion").send(String("true"));
+       motion=true;
+     }else{
+       Homie.getLogger() << "motion resend " << ": " << "false" << endl;
+       sensorNode.setProperty("motion").send(String("false"));
+       motion=false;
+     }
+     lastsend_PIR=millis();
+  }
+}
+#endif
+
+
+
+void loopHandler() {
+
+  #ifdef SENSOR_DHT22
+
+  #endif
+
+  #ifdef SENSOR_BH1750
+
+  #endif
+
+
+  #ifdef SENSOR_PIR
+    loop_PIR();
+  #endif
+
+
+  
+
+  
+
+}
+
+
+void checkESPStatus()
+{
+  if (WiFi.status() != WL_CONNECTED) //restart if wifi signal loss
+  {
+    ESP.reset();
   }
 }