combined sourcode for mostly esp8266 sensor iot nodes.
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//#define DEBUG
#include "Arduino.h"
#include <Adafruit_Sensor.h> //required for dht library
#include <DHT.h>
#include <Wire.h>
#include <BH1750.h>
// data/homie/config.json hochladen mit platformio run --target uploadfs
/*
float humidity; //[%RH] DHT
float temperature; //[deg C] DHT
float light; //[Lux] BH1750
bool movement //true bei pir output hight, false wenn low HC12?
*/
//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
bool motion=false;
#include <Homie.h>
#define FW_NAME "sensoresp3"
#define FW_VERSION "1.0.0"
HomieNode sensorNode("sensors", "Sensors","sensors");
char tempstring[16]; //for dtostrf
void loopHandler();
void setup() {
Serial.begin(115200);
Serial.println();
Serial.println("Welcome");
pinMode(PIRPIN, INPUT_PULLUP);
Serial.println("initializing dht");
dht.begin(); // dht pins: 1=power, 2=data, 3=NC, 4=GND. 10k from data to power needed
Serial.println("initializing bh1750");
Wire.begin(); //initialize i2c. SDA=D2, SCL=D1
if (lightMeter.begin(BH1750::CONTINUOUS_HIGH_RES_MODE)) {
Serial.println(F("BH1750 Advanced begin"));
} else {
Serial.println(F("Error initialising BH1750"));
}
Serial.println("connecting..");
Homie_setFirmware(FW_NAME, FW_VERSION);
Homie_setBrand(FW_NAME);
Homie.setLoopFunction(loopHandler);
sensorNode.advertise("temperature");
sensorNode.advertise("humidity");
sensorNode.advertise("light");
sensorNode.advertise("motion");
Homie.setup();
Serial.println("connected"); //wird nicht ausgegeben. keine ahnung warum.
}
void loop() {
Homie.loop();
}
void loopHandler() {
if (millis() >= (lastPIRtime+PIRdelay)){
if (digitalRead(PIRPIN)){
if (!motion) { //changed?
Homie.getLogger() << "motion " << ": " << "true" << endl;
sensorNode.setProperty("motion").send(String("true"));
}
motion=true;
}else{
if (motion) { //changed?
Homie.getLogger() << "motion " << ": " << "false" << endl;
sensorNode.setProperty("motion").send(String("false"));
}
motion=false;
}
lastPIRtime=millis();
}
if (millis() >= (lastsensorreadtime+sensorupdatedelay))
{
Serial.println("Sending");
if (WiFi.status() != WL_CONNECTED) //restart if wifi signal loss
{
ESP.reset();
}
float temperatureDHT = dht.readTemperature();
if (!(isnan(temperatureDHT) == 1)){ //success
Homie.getLogger() << "temperature " << ": " << temperatureDHT << endl;
sensorNode.setProperty("temperature").send(String(temperatureDHT));
}
float humidityDHT = dht.readHumidity();
if (!(isnan(humidityDHT) == 1)){ //success
Homie.getLogger() << "humidity " << ": " << humidityDHT << endl;
sensorNode.setProperty("humidity").send(String(humidityDHT));
}
float light = lightMeter.readLightLevel(); // [lux]
Homie.getLogger() << "light " << ": " << light << endl;
sensorNode.setProperty("light").send(String(light));
lastsensorreadtime=millis();
}
}