MQTT2HA

A JavaScript/TypeScript library to create MQTT entities that are automatically discovered by Home Assistant.

Features

• Easy creation of Home Assistant MQTT entities
• Automatic MQTT discovery configuration
• Supported entity types:
  • Binary Sensors
  • Buttons
  • Sensors
  • Switches
• TypeScript support with full type definitions
• Configurable availability reporting

Installation

npm install mqtt2ha

Requirements

• Node.js >= 22.4.0
• A running MQTT broker
• Home Assistant with MQTT integration enabled and discovery enabled

Quick Start

See example.ts for usage examples.

Here's a simple example of creating a motion sensor:

import { BinarySensor, MqttSettings, DeviceConfiguration } from 'mqtt2ha';

// MQTT connection settings
const mqttSettings: MqttSettings = {
  host: 'localhost',
  port: 1883,
  username: 'your_username',
  password: 'your_password',
  client_name: 'my-mqtt-client'
};

// Device configuration
const device: DeviceConfiguration = {
  name: 'Room Sensor',
  manufacturer: 'My Company',
  model: 'Room Sensor v1',
  identifiers: 'room_sensor_1'
};

// Create a motion sensor
const motionSensor = new BinarySensor({
  mqtt: mqttSettings,
  component: {
    component: 'binary_sensor',
    name: 'Motion Sensor',
    device_class: 'motion',
    unique_id: 'motion_sensor_1',
    device
  }
});

// Write configuration to MQTT (required for discovery)
await motionSensor.writeConfig();

// Publish state changes
await motionSensor.setState(true);

Reference documentation

The complete reference documentation for the mqtt2ha library can be found at https://bourquep.github.io/mqtt2ha/.

Contributing

If you want to contribute to this project, please read the CONTRIBUTING.md file for guidelines.

License

mqtt2ha is licensed under the MIT License. This is a permissive license that allows you to use, modify, and redistribute this software in both private and commercial projects. You can change the code and distribute your changes without being required to release your source code. The MIT License only requires that you include the original copyright notice and license text in any copy of the software or substantial portion of it.

Copyright

© 2025 Pascal Bourque

Support

For bug reports and feature requests, please use the GitHub Issues page.

For general questions and discussions, join our Discussion Forum.

Acknowledgments

• Home Assistant for their excellent home automation platform
• MQTT.js for the robust MQTT client implementation
• ha-mqtt-discoverable for their excellent Python MQTT discovery implementation