MQTT

Websockets & socket.io

• Web sockets are communication protocol.
• Duplex communication over a singleTCP function withHTTP
• UsesHTTP for initial connection establishment.
• MQTT message are sent throughWebsocket envelope.
• JS file used from this CDN, https://cdnjs.com/libraries/paho-mqtt
• Events handled, onConnectionLost, onMessageArrived, onConnect, onDisconnect, publishMessage
• Subscribe to topic on connection establishment.
• Receiving message from all users for any topic.
  • host: test.mosquitto.org
  • port: 8080
• Docs → eclipse.org/paho/files/jsdoc/Paho.MQTT.Client.html

Links

• Youtube MQTT web dashboard - https://www.youtube.com/watch?v=rlnhd67PV-M