MQTT

MQ Telemetry Protocol is a network protocol used in many IoT devices.

Concept

• Publish on a topic
• Subscribe to a topic
• Messages is an information
• Topic
  • What
    • Register interest for incoming message
    • Specify where you want to publish
  • How
    • home/office/lamp for example
    • Case sensitive
• Broker
  • Roles
    • Receive all messages
    • Filters the messages
    • Publish to all subscribers

Software

• Broker
  • HiveMQ Community Edition
  • Mosquito MQTT Broker
• Test
  • MQTT Explorer
    • If localhost don't work, try 127.0.0.1
• Usage
  • Home Assistant
  • Node-RED

Resources

• What is MQTT and How It Works