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MQTT: publish and subscribe Locked

The MQTT broker and the publish/subscribe model (and why it differs from the request and response of HTTP), topics, wildcards, retained messages and QoS, receiving commands without freezing with check_msg(), the DHT22 and the relay through the topic panel, Keep Alive, last will and reconnection.

🔒 Conclua antes a trilha “Wi-Fi and HTTP”.

0 of 11 items · 0 of 500 XP

  1. Lesson MQTT: publish and subscribe 10 XP (locked: Conclua antes a trilha “Wi-Fi and HTTP”.)
  2. Challenge First messages on the broker 70 XP (locked: Conclua antes a trilha “Wi-Fi and HTTP”.)
  3. Lesson Receiving commands: subscribe and callback 10 XP (locked: Conclua antes a trilha “Wi-Fi and HTTP”.)
  4. Challenge LED over MQTT 70 XP (locked: Conclua antes a trilha “Wi-Fi and HTTP”.)
  5. Lesson Topics, wildcards, retained messages and QoS 10 XP (locked: Conclua antes a trilha “Wi-Fi and HTTP”.)
  6. Challenge Thermometer on the broker 75 XP (locked: Conclua antes a trilha “Wi-Fi and HTTP”.)
  7. Lesson check_msg(): receiving without freezing 10 XP (locked: Conclua antes a trilha “Wi-Fi and HTTP”.)
  8. Challenge Greenhouse fan 75 XP (locked: Conclua antes a trilha “Wi-Fi and HTTP”.)
  9. Lesson Keep Alive, last will and reconnection 10 XP (locked: Conclua antes a trilha “Wi-Fi and HTTP”.)
  10. Challenge Stay online 80 XP (locked: Conclua antes a trilha “Wi-Fi and HTTP”.)
  11. Challenge Build the relay lamp 80 XP (locked: Conclua antes a trilha “Wi-Fi and HTTP”.)