Day5

HackDay by Stephen Chin

Arduino / NodeMCU workshop

Java client that interacts with NodeMCU via MQTT server topic and WiFi:

import org.fusesource.mqtt.client.BlockingConnection;
import org.fusesource.mqtt.client.MQTT;
import org.fusesource.mqtt.client.QoS;

public class MqttClient {

    public static void main(String[] args) throws Exception {
        MQTT mqtt = new MQTT();
        mqtt.setHost("tcp://127.0.0.1:1883");
        mqtt.setUserName("user");
        mqtt.setPassword("pass");
        BlockingConnection conn = mqtt.blockingConnection();
        conn.connect();
        conn.publish("RX-music", "1".getBytes(), QoS.AT_MOST_ONCE, false);
    }

}

You need this dependency in build.gradle:

compile 'org.fusesource.mqtt-client:mqtt-client:1.12'