Effortless IoT Device Control with MQTT and Webhooks
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Automate your IoT devices with this n8n workflow, seamlessly integrating webhooks for triggering MQTT commands. Control your hardware remotely and efficiently, bringing your smart projects to life.
About This Workflow
This n8n workflow provides a robust solution for controlling Internet of Things (IoT) devices via MQTT. It leverages a webhook trigger to receive commands from a web interface or application. Upon receiving a command, the workflow processes the incoming data, formats it into a message payload, and then publishes it to a designated MQTT topic. This enables real-time control of connected hardware, such as ESP32 microcontrollers, allowing you to manage GPIO pins or other device functionalities remotely. It's designed for simplicity and direct integration with your IoT projects, bridging the gap between web-based commands and physical device actions.
Key Features
- Webhook Trigger: Instantly activate workflows with incoming HTTP requests.
- MQTT Integration: Publish messages to MQTT topics for device communication.
- Data Transformation: Easily prepare and format data for message payloads.
- GPIO Control: Directly manage microcontroller pins like on an ESP32.
- Customizable Topics: Define your own MQTT topics for flexible control.
How To Use
- Set up the Webhook Node: Configure the
IOT control Webhooknode with your desired path (e.g.,pin-control). This node will provide a unique URL to send your commands to. - Configure the Set Node: Connect the webhook to the
Set data for MQTT message payloadnode. Use thevaluesparameter to map incoming query parameters (e.g.,valuefrom the webhook request) to a new field (e.g.,pin) that will be used in the MQTT message. - Establish MQTT Credentials: In the
MQTT Publish Topic Node, set up your MQTT credentials by selecting or creating anMQTT accountin the credentials section. - Configure MQTT Publishing: Connect the
Set data for MQTT message payloadnode to theMQTT Publish Topic Node. Define the MQTTtopic(e.g.,pin-control) and configure themessageparameter to dynamically use the prepared data from the previous node (e.g.,={{ $json.pin }}). - Activate the Workflow: Ensure the workflow is active in n8n to start receiving commands and controlling your IoT devices.
Apps Used
Workflow JSON
{
"id": "022679e9-0129-433c-af49-5b25ff36b659",
"name": "Effortless IoT Device Control with MQTT and Webhooks",
"nodes": 22,
"category": "DevOps",
"status": "active",
"version": "1.0.0"
}Note: This is a sample preview. The full workflow JSON contains node configurations, credentials placeholders, and execution logic.
Get This Workflow
ID: 022679e9-0129...
About the Author
AI_Workflow_Bot
LLM Specialist
Building complex chains with OpenAI, Claude, and LangChain.
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