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miIO Device Library

This is a small library for controlling Mi Home devices that implement the miIO protocol, such as the Mi Air Purifier, Mi Robot Vacuum and Mi Smart Socket.

This library requires at least Node 6.0.0.

Devices types

The intent of this library is to support all miIO-compatible devices and to provide an easy to use API for them. The library maps specific device models to generic device types to simplify interacting with them.

Currently supported devices are:

  • Air Purifiers (1, 2 and Pro)
  • Mi Smart Socket Plug
  • Mi Robot Vacuum
  • Mi Smart Home Gateway (Aqara) and accessories

See documentation for devices for information about the types, their API and supported device models.

Installation

npm install --save miio

Usage

const miio = require('miio');

Resolve a handle to the device:

// Resolve a device, resolving the token automatically if possible
miio.device({ address: '192.168.100.8' })
	.then(console.log)
	.catch(console.error);

// Resolve a device, specifying the token (see below for how to get the token)
miio.device({ address: '192.168.100.8', token: 'token-as-hex' })
	.then(console.log)
	.catch(console.error);

Call methods to interact with the device:

// Call any method via call
device.call('set_mode', [ 'silent' ])
	.then(console.log)
	.catch(console.error);

// Fetch some properties
device.getProperties([ 'power', 'mode', 'aqi', 'temp_dec', 'humidity' ])
	.then(console.log)
	.catch(console.error);

// Or if a model has been specified use some of its methods
device.setPower(false)
	.then(on => console.log('Power is now', on));

Monitor and transform properties:

// Define a property that should be monitored
device.defineProperty('mode');

// Define that a certain property should be run through a custom conversion
device.defineProperty('temp_dec', v => v / 10.0);

// Listen for changes to properties
device.on('propertyChanged', e => console.log(e.property, e.oldValue, e.value));

// Activate automatic property monitoring (activated by default for most devices)
device.monitor();

// Stop automatic property monitoring
device.stopMonitoring();

// Fetch the last value of a monitored property
const value = device.property('temp_dec');

If you are done with the device call destroy to stop all network traffic:

device.destroy();

Tokens

A few miIO devices send back their token during a handshake and can be used without figuring out the token. Most devices hide their token, such as Yeelights and the Mi Robot Vacuum.

Finding tokens contains more information about how to get the token of those devices.

Discovering devices

Use miio.browser() to look for devices on the local network. This method of discovery will tell you directly if a device reveals its token and can be auto-connected to. It will not tell you the model of devices until they are connected to via miio.device().

Example:

const browser = miio.browser({
	cacheTime: 300 // 5 minutes. Default is 1800 seconds (30 minutes)
});

const devices = {};
browser.on('available', reg => {
	if(! reg.token) {
		console.log(reg.id, 'hides its token');
		return;
	}

	miio.device(reg)
		.then(device => {
			devices[reg.id] = device;

			// Do something useful with the device
		})
		.catch(handleErrorProperlyHere);
});

browser.on('unavailable', reg => {
	const device = devices[reg.id];
	if(! device) return;

	device.destroy();
	delete devices[reg.id];
})

You can also use mDNS for discovery, but this library does not contain a mDNS implementation. You can choose a mDNS-implementation suitable for your needs. Devices announce themselves via _miio._udp and should work for most devices, in certain cases you might need to restart your device to make it announce itself.

Advanced: Skip model and token checks

The miio.device function will return a promise that checks that we can communicate with the device and what model it is. If you wish to skip this step and just create a reference to a device use miio.createDevice:

const device = miio.createDevice({
	address: '192.168.100.8',
	token: 'token-as-hex',
	model: 'zhimi.airpurifier.m1'
});

You will need to call device.init() manually to initialize the device:

device.init()
	.then(() => /* device is ready for commands */)
	.catch(console.error);

Advanced: Device management

Get information and update the wireless settings of devices via the management API.

Discover the token of a device:

device.discover()
	.then(info => console.log(info.token));

Get internal information about the device:

device.management.info()
	.then(console.log);

Update the wireless settings:

device.management.updateWireless({
	ssid: 'SSID of network',
	passwd: 'Password of network'
}).then(console.log);

Warning: The device will either connect to the new network or it will end up creating its own network if the settings are invalid.

Protocol documentation

This library is based on the documentation provided by OpenMiHome. See https://github.com/OpenMiHome/mihome-binary-protocol for details. For details about how to figure out the commands for new devices look at the documentation for protocol and commands.