One of the most crucial IoT parts is the communication channel. One of the most common protocols used for IoT communication is MQTT (MQ Telemetry Transport protocol) which provides lightweight methods of carrying out messaging using publish and subscribe queueing model.
MQTT is ideal for IoT, it is designed to be minimal and this is perfect to use it in mobility, embedded systems another bandwidth-sensitive application. MQTT introduces something called “MQTT Broker”, this is in the matter of fact the heart of publish/subscribe protocol, like MQTT is.
MQTT broker is responsible for receiving messages, filtering, determining who is subscribed to the message, and sending messages to subscribed clients (devices, phones, applications…) MQTT is based on TCP/IP.
Mosquitto is one of the most widely used MQTT brokers. Mosquitto is free and open source. CloudMQTT uses Mosquitto. In the steps below we will go through the process of creating your CloudMQTT account (FREE) and testing your instance.