Table of Contents

• Getting Started
• Usage and examples
  • Import YeelightService
  • Subscribing to devices
  • Get device by name
  • Get device by model
  • Subscribing to device property
  • Changing property of device
• Types
• Performance
• Methods
  • setName
  • setPower
  • setColorTemperature
  • setRgb
  • setHsv
  • setBrightness
  • setAsDefault
  • togglePower
  • adjustBrightness
  • adjustTemperature
  • adjustColor
  • sendCommand
• Contributing
• License
• Contact

Getting Started

Install package

npm install yeelight-service

or

Install and save in package.json

npm install yeelight-service --save

Usage and examples

Import YeelightService

import { YeelightService } from 'yeelight-service';
const yeelightService = new YeelightService();

Subscribing to devices

This function subscribes to all devices connected to current WiFi. Event will be executed each time, a new device is connected.

yeelightService.devices.subscribe((devices) => {
    // executed each time device is connected
    // do something with devices
});

Get device by name

This function gets device by name. If there are multiple devices with given name, only the first one will be returned.

yeelightService.getDeviceByName('deviceName').subscribe((device) => {
    // executed when device will be found
    // do something with device
});

Get device by model

This function gets device by model. If there are multiple devices with given model, only the first one will be returned.

yeelightService.getDeviceByModel('lamp1').subscribe((device) => {
    // executed when device will be found
    // do something with device
});

Subscribing to device property

You can subscribe to device property (e.g. subscribe to power state)

yeelightService.getDeviceByModel('lamp1').subscribe((device) => {
    device.power.subscribe((powerState) => {
        // executed each time power state change
        // do something with power state
    });
});

Or you can get power state just once

yeelightService.getDeviceByModel('lamp1').subscribe((device) => {
    const power = device.power.value;
    // do something with power state
});

If you want to observe more than one property, do it in RXJS-way. For example, if you want to be notified each time when connection status, power state OR brightness change, you can use RXJS combineLatest.

yeelightService.getDeviceByModel('lamp1').subscribe((device) => {
    combineLatest(
        device.connected,
        device.power,
        device.brightness
    ).pipe(
        map(([connected, power, brightness]) => {
            return { connected, power, brightness };
        })
    ).subscribe((data) => {
        // executed each time `connected`, `power` or `brightness` change
        // do something with data
    });
});

Changing property of device

Every function changing any device property returns promise object with operation status.

yeelightService.getDeviceByModel('lamp1').subscribe((device) => {
    device.setPower('on').then((result) => {
        // do something with result
    });
});

Types

Interface file: 'yeelight-service/lib/yeelight.interface'

Example (log to console after changing power state failed):

import { YeelightService } from 'yeelight-service';
import {
    IYeelight,
    IYeelightDevice,
    IYeelightMethodResponse,
    YeelightMethodStatusEnum
} from 'yeelight-service/lib/yeelight.interface';

const yeelightService: IYeelight = new YeelightService();
yeelightService.getDeviceByModel('lamp1').subscribe((device: IYeelightDevice) => {
    device.setPower('on').then((result: IYeelightMethodResponse) => {
        if (result.status === YeelightMethodStatusEnum.OK) {
            return;
        }

        if (result.errorMessage) {
            console.log(result.errorMessage);
            return;
        }

        console.log(`Unexpected error occured. Error code: ${ result.status }`);
    });
});

Performance

If you want to terminate the service, please use destroy function. It will close all devices sockets, as well as main service socket itself.

yeelightService.destroy();

You can close connection of single device, by using destroy function on device. Example:

yeelightService.devices.subscribe((devices) => {
    devices.forEach(() => {
        const deviceName = device.name.value;
        const deviceConnected = device.connected.value;

        if (!deviceConnected) {
            return;
        }

        if (deviceName !== 'myDevice') {
            device.destroy();
        }

        // do something with device `myDevice` knowing, that every other device is disconnected from socket
    });
});

Methods

Not all of methods from official Yeelight API are supported. If you need method that is not on the list to be part of the package, please create github issue, or you can use sendCommand method described below.

setName

Set name of the device. Only parameter is new name of the device. Method returns Promise with status code and error (if occured).

@param {string} name
@returns {Promise<IYeelightMethodResponse>}
device.setName(name);

setPower

Turn on or off the device. Only required parameter is new state of the device. Method returns Promise with status code and error (if occured). See also togglePower. Effect and duration are optional properties. By default duration is set to 1000ms and effect is set to smooth.

@param {YeelightPowerState} power
@param {YeelightEffect} effect
@param {number} duration
@returns {Promise<IYeelightMethodResponse>}
device.setPower(power, effect, duration);

setColorTemperature

Set color temperature of the device. Only required parameter is new color temperature - defined in Kelvin degrees in the range from 2700 to 6500. Method returns Promise with status code and error (if occured). Effect and duration are optional properties. By default duration is set to 1000ms and effect is set to smooth.

@param {number} colorTemperature
@param {YeelightEffect} effect
@param {number} duration
@returns {Promise<IYeelightMethodResponse>}

device.setColorTemperature(colorTemperature, effect, duration);

setRgb

Set RGB color of the device. Only required parameter is new RGB color. It can be hex value (like "#FFFFFF"), number (16777215) or array of numbers ([255, 255, 255]). Method returns Promise with status code and error (if occured). Effect and duration are optional properties. By default duration is set to 1000ms and effect is set to smooth.

@param {string | number | number[]} rgb
@param {YeelightEffect} effect
@param {number} duration
@returns {Promise<IYeelightMethodResponse>}

device.setRgb(rgb, effect, duration);

setHsv

Set hue and saturation of the device. Required parameters are hue (in range from 0 to 359 degree) and saturation (in percent in range from 0 to 100). Method returns Promise with status code and error (if occured). Effect and duration are optional properties. By default duration is set to 1000ms and effect is set to smooth.

@param {number} hue
@param {number} saturation
@param {YeelightEffect} effect
@param {number} duration
@returns {Promise<IYeelightMethodResponse>}

device.setHsv(hue, saturation, effect, duration);

setBrightness

Set brightness of the device. Only required parameter is brightness (in percent in range from 0 to 100). Method returns Promise with status code and error (if occured). Effect and duration are optional properties. By default duration is set to 1000ms and effect is set to smooth.

@param {number} brightness
@param {YeelightEffect} effect
@param {number} duration
@returns {Promise<IYeelightMethodResponse>}

device.setBrightness(brightness, effect, duration);

setAsDefault

Set current device state as default state. Method returns Promise with status code and error (if occured).

This method is used to save current state of smart LED in persistent memory. So if user powers off and then powers on the smart LED again (hard power reset), the smart LED will show last saved state.

@returns {Promise<IYeelightMethodResponse>}

device.setAsDefault();

togglePower

Toggle current device power state. Method returns Promise with status code and error (if occured). See also setPower.

@returns {Promise<IYeelightMethodResponse>}

device.togglePower();

adjustBrightness

Adjust brightness of the device. Only required parameter is difference between current state and new state (in percent in range from -100 to 100). Method returns Promise with status code and error (if occured). Effect and duration are optional properties. By default duration is set to 1000ms and effect is set to smooth.

@param {number} difference
@param {YeelightEffect} effect
@param {number} duration
@returns {Promise<IYeelightMethodResponse>}

device.adjustBrightness(difference, effect, duration);

adjustTemperature

Adjust color temperature of the device. Only required parameter is difference between current state and new state (in percent in range from -100 to 100). Method returns Promise with status code and error (if occured). Effect and duration are optional properties. By default duration is set to 1000ms and effect is set to smooth.

@param {number} difference
@param {YeelightEffect} effect
@param {number} duration
@returns {Promise<IYeelightMethodResponse>}

device.adjustTemperature(difference, effect, duration);

adjustColor

Adjust color of the device. Only required parameter is difference between current state and new state (in percent in range from -100 to 100). Method returns Promise with status code and error (if occured). Effect and duration are optional properties. By default duration is set to 1000ms and effect is set to smooth.

@param {number} difference
@param {YeelightEffect} effect
@param {number} duration
@returns {Promise<IYeelightMethodResponse>}

device.adjustColor(difference, effect, duration);

sendCommand

If you need to use method from Yeelight API, that is not included in the package, you can use sendCommand method. Method returns Promise with status code and error (if occured). Only parameter is command, which is object that contain operation ID, called method and method params.

@param { id: number; method: string; params: TYeelightParams; } command
@returns {Promise<IYeelightMethodResponse>}

device.sendCommand(command);

Contributing

All contributions are appreciated. To make contribution:

1. Fork the Project
2. Create your Feature Branch (git checkout -b feature/featureName)
3. Commit your Changes (git commit -m 'Short description')
4. Push to the Branch (git push origin feature/featureName)
5. Open a Pull Request

Credits

• Dawid Chróścielski - Code Review, suggestions about performance issues and code structure.

License

This package is distributed under the MIT License.