Klappe_Arduino/Klappe_Arduino.ino

#include <Ethernet.h>
#include <PubSubClient.h>
#include <string.h>

// Update these with values suitable for your network.
byte mac[] = { 0xDE, 0xED, 0xBA, 0xFE, 0xFE, 0xED };

EthernetClient ethClient;
PubSubClient mqttClient(ethClient);

// relais steuerung
int relais1pin = 2;
int relais2pin = 3;

void door_open() {
	// Rechtslauf
	digitalWrite(relais1pin, HIGH);
	digitalWrite(relais2pin, LOW);
	Serial.println("Tür auf");
}

void door_close() {
	// Linkslauf
	digitalWrite(relais1pin, LOW);
	digitalWrite(relais2pin, HIGH);
	Serial.println("Tür zu");
}

void door_stop() {
	// keine Bewegung
	digitalWrite(relais1pin, HIGH);
	digitalWrite(relais2pin, HIGH);
	Serial.println("Tür stop");
}

void callback(char *topic, byte *payload, unsigned int length) {
	Serial.print("Message arrived [");
	Serial.print(topic);
	Serial.print("] ");
	for (unsigned int i = 0; i < length; i++) {
		Serial.print((char) payload[i]);
	}
	Serial.println();
	if (strcmp(topic, "loxone/hof/Gansetorauf")==0) {
		if (payload[0] == '0') {
			door_stop();
			mqttClient.publish("Arduino-1/Hof/Gansetorauf", "0");
		} else {
			door_open();
			mqttClient.publish("Arduino-1/Hof/Gansetorauf", "1");
		}
	} else if (strcmp(topic, "loxone/hof/Gansetorzu")==0) {
		if (payload[0] == '0') {
			door_stop();
			mqttClient.publish("Arduino-1/Hof/Gansetorzu", "0");
		} else {
			door_close();
			mqttClient.publish("Arduino-1/Hof/Gansetorzu", "1");
		}
	}
}

void setup() {
	// Open serial communications and wait for port to open:

	Serial.begin(9600);
	while (!Serial) {
		; // wait for serial port to connect. Needed for native USB port only
	}
	Ethernet.begin(mac);
	// Allow the hardware to sort itself out
	delay(1500);
	//mqttClient.setServer(server, 1883);
	mqttClient.setServer("192.168.11.35", 1883);
	mqttClient.setCallback(callback);

	if (mqttClient.connect("arduino-1", "loxberry", "OSVL0AMqISFXgr5g")) {
		// connection succeeded
		Serial.println("Connected ");
		boolean r = mqttClient.subscribe("loxone/hof/Gansetorauf");
		Serial.println("loxone/hof/Gansetorauf subscribe ");
		Serial.println(r);
		r = mqttClient.subscribe("loxone/hof/Gansetorzu");
		Serial.println("loxone/hof/Gansetorzu subscribe ");
		Serial.println(r);
	} else {
		// connection failed
		// mqttClient.state() will provide more information
		// on why it failed.
		Serial.println("Connection failed ");
	}
	// Relais
		pinMode(relais1pin, OUTPUT);
		pinMode(relais2pin, OUTPUT);

	door_stop();
}

void loop() {
	//

	while (true) {

		delay(1000);
		mqttClient.loop();
	}

}