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Arduino & IoT Academy · Lesson

Publish Sensor Topics

Send readings to named topics.

Sending Data Is Publishing

Once connected, sharing a reading is one call. You publish a value to a topic and the broker delivers it to subscribers.

Choose a Clear Topic

Pick a descriptive topic path like home/garden/soil. Good names make a growing system easy to read and route.

home/garden/soil/moisture

All lessons in this course

  1. Why MQTT Fits IoT
  2. Connect to a Broker
  3. Publish Sensor Topics
  4. Subscribe & Act on Commands
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