IoT Control with MQTT and Webhook

This n8n workflow enables seamless IoT device control through a web interface by integrating MQTT messaging and webhooks. When a user interacts with the web-based control panel, specifically clicking ‘on’ or ‘off’ buttons, a webhook is triggered. This webhook processes the command, prepares a message payload, and publishes it to an MQTT topic named ‘pin-control’. The message payload contains the pin number or command, which is then received by an ESP32 microcontroller or similar IoT device. This setup allows remote toggling of GPIO pins, facilitating operations like turning LEDs on/off or controlling other connected devices. The workflow is ideal for creating custom smart home controls, remote device management, or IoT prototyping.