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Arduino & IoT Academy · Lesson

Wire & Code the Sensor Node

Read climate data and publish it over MQTT.

Build the Node

Now you turn the plan into hardware. You will wire the DHT22 to the ESP32 and write code that reads climate data and publishes it. 🔌

Wire Power and Ground

Connect the DHT22's VCC to 3.3V and GND to ground on the ESP32. Shared ground is what lets the two parts agree on signals.

All lessons in this course

  1. Plan the End-to-End Architecture
  2. Wire & Code the Sensor Node
  3. Build the Cloud Dashboard & Alerts
  4. Deploy, Monitor & Update in the Field
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