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IoT using Eclipse Paho for Java, Mosquitto MQTT and ESP8266

Search Trending Videos Top Searched samsung mobiles, android development, android smartphones, and Java Android Eclipse, IoT using Eclipse Paho for Java, Mosquitto MQTT and ESP8266.

In this video, I build a simple Internet-of-Things example using the following tools:

  • Microsoft Windows 10 PC
  • Eclipse Mosquitto free MQTT Message Broker for Windows
  • Eclipse Paho Java library
  • An ESP8266 microcontreller with WiFi
  • ESPEasy firmware for ESP8266
  • Espressif memory flashing application for ESP8266
  • Node-Red

Here is the Java code:

File “App.java”:

package application.IoT_Application;

import java.util.UUID;

import org.eclipse.paho.client.mqttv3.IMqttToken;
import org.eclipse.paho.client.mqttv3.MqttAsyncClient;
import org.eclipse.paho.client.mqttv3.MqttException;

public class App

public static MqttAsyncClient myClient;

public static void main( String[] args ) throws MqttException

 myClient = new MqttAsyncClient("tcp://192.168.1.70:1883", UUID.randomUUID().toString());
 MyCallback myCallback = new MyCallback();
 myClient.setCallback(myCallback);

 IMqttToken token = myClient.connect();
 token.waitForCompletion();

 myClient.subscribe("/ESP-01_MQTT_client1/Input_Switch/On_Off_Value = ", 0);

File “MyCallback.java”:

package application.IoT_Application;

import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttMessage;

public class MyCallback implements MqttCallback

public void connectionLost(Throwable arg0)
// TODO Auto-generated method stub

public void deliveryComplete(IMqttDeliveryToken arg0)
// TODO Auto-generated method stub

public void messageArrived(String topic, MqttMessage message) throws Exception

App.myClient.publish(“/ESP-01_MQTT_client2/Output_Switch/On_Off_Value = “, message.getPayload(), 0, false);

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IoT using Eclipse Paho for Java, Mosquitto MQTT and ESP8266

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