The ESP32 microcontroller acts as the "brain," interfacing with sensors (e.g., DHT11 for humidity, light sensors) and actuators (e.g., relays for appliances).
Publish sensor data to a specific topic (e.g., esp32/sensor/data ) and subscribe to a command topic to receive instructions from the cloud. 4. Backend Processing & Visualization Building Complete IoT Solution with ESP32 and A...
Uses secure MQTT (Message Queuing Telemetry Transport) over Wi-Fi, utilizing port 8883 for encrypted data exchange. The ESP32 microcontroller acts as the "brain," interfacing