I currently installed openhabian to a Raspberry Pi 3. I have a 4 channel relay connected to an Arduino. I would like that the relays can switch on and off using openhab. The relays can be switched using serial. I have read that you can use an esp8266, but I donβt have access to this. How can I make this connection work without using an esp8266. Is this maybe possible through gpio pins?
This is my Arduino code:
#define RELAY1 2
#define RELAY2 3
#define RELAY3 4
#define RELAY4 5void setup(){
Serial.begin(9600);pinMode(RELAY1, OUTPUT);
pinMode(RELAY2, OUTPUT);
pinMode(RELAY3, OUTPUT);
pinMode(RELAY4, OUTPUT);
digitalWrite(RELAY1,HIGH);
digitalWrite(RELAY2,HIGH);
digitalWrite(RELAY3,HIGH);
digitalWrite(RELAY4,HIGH);
}void loop (){
if (Serial.available()) {
char ser = Serial.read();
switch(ser){
case β1β: AAN(RELAY1); break;
case β2β: AAN(RELAY2); break;
case β3β: AAN(RELAY3); break;
case β4β: AAN(RELAY4); break;
case β5β: UIT(RELAY1); break;
case β6β: UIT(RELAY2); break;
case β7β: UIT(RELAY3); break;
case β8β: UIT(RELAY4); break;
}
}
}void AAN(int8_t pin) {
digitalWrite(pin, LOW);
}void UIT(int8_t pin) {
digitalWrite(pin, HIGH);
}//RELAY1 AAN = 1
//RELAY2 AAN = 2
//RELAY3 AAN = 3
//RELAY4 AAN = 4
//RELAY1 UIT = 5
//RELAY2 UIT = 6
//RELAY3 UIT = 7
//RELAY4 UIT = 8