Technical Implementation Made Simple

The MQTT Trigger node acts as a subscriber to your MQTT broker, listening for messages on specific topics you configure. When messages arrive:

1. The MQTT Trigger node activates and captures the message payload
2. The message data is parsed and made available to downstream nodes
3. Your custom workflow processes this data through n8n's visual interface
4. Actions are triggered across connected systems and applications

This architecture creates a powerful event-driven system where physical devices, software systems, and business processes can communicate in real-time through standardized messaging protocols, all orchestrated through n8n's flexible workflow engine.