Lifx

Library for controlling LIFX Wi-Fi Smart LED devices over the LAN.

Overview

This library allows you to communicate with LIFX devices over the LAN without relying on the LIFX HTTP API. All communication is done over UDP for low-latency device control using the LIFX LAN Protocol.

See https://lan.developer.lifx.com/docs for more information about the LIFX LAN Protocol.

Getting started

Install the NuGet package into your application.

Package Manager

Install-Package Lifx

.NET CLI

dotnet add package Lifx

Device creation

The LightFactory class provides functionality for creating ILight objects from a given IP address. The ILight object contains the IP address, product (i.e. model) and version of the device and is used for all control operations.

var lightFactory = new LightFactory();

using (var light = await lightFactory.CreateLightAsync(IPAddress.Parse("192.168.0.100")))
{
    // ...
}

The LightFactory class has an overloaded constructor that takes an int parameter used to specify the port number used when communicating with lights. The default port number used with the parameterless constructor is 56700.

var lightFactory = new LightFactory(1000);

Device info

Use the overridden ToString() method of the ILight object to obtain a string representation of the device.

Console.WriteLine(light);

Output

[Address: 192.168.0.100; Product: White800HightVoltage; Version: 0]

Device state

Use the GetStateAsync() method to retrieve the current state of the device, and the overridden ToString() method of the returned LightState object to obtain a string representation of the device containing the label, power, brightness, temperature and color.

var state = await light.GetStateAsync();

Console.WriteLine(state);

Output

[Label: Office; Power: On; Brightness: 1; Temperature: 3000; Color: [Hue: 0; Saturation: 0]]

Device label

Use the SetLabelAsync() method of the ILight object to set the device label. A label should consist of no more than 32 bytes with UTF8 encoding.

await light.SetLabelAsync("Office");

Device power

Light power can be set using SetPowerAsync(Power) where the Power parameter is an enum with values Off and On.

await light.SetPowerAsync(Power.Off);
await light.SetPowerAsync(Power.On);

The methods OffAsync() and OnAsync() provide the same functionality.

await light.OffAsync();
await light.OnAsync();

Device brightness

Light brightness can be set using SetBrightnessAsync(Percentage) where the Percentage parameter is a float between 0 and 1.

await light.SetBrightnessAsync(0.5);

Device temperature

Light temperature can be set using SetTemperatureAsync(Temperature) where the Temperature parameter is an int between 1500 and 9000 representing kelvin value. The Temperature struct exposes static properties with named temperature values.

// Set temperature to explicit value
await light.SetTemperatureAsync(3500);

// Set temperature to named value
await light.SetTemperatureAsync(Temperature.Warm);

Named temperature values

• BlueIce
• BlueWater
• BlueOvercast
• BlueDaylight
• CloudyDaylight
• BrightDaylight
• NoonDaylight
• Daylight
• SoftDaylight
• CoolDaylight
• Cool
• Neutral
• NeutralWarm
• Warm
• Incandescent
• UltraWarm

Device color

Light color can be set using SetColorAsync(Color) where the Color parameter is a struct comprised of hue (int between 0 and 360) and saturation (float between 0 and 1). The Color struct exposes static properties with named color values.

// Set color to explicit value
await light.SetColorAsync(new Color(180, 0.5));

// Set color to named value
await light.SetColorAsync(Color.Red);

Named color values

• White
• Red
• Orange
• Yellow
• Green
• Cyan
• Blue
• Purple
• Pink

Note: this method is only applicable to devices that support color. Calling this method on an unsupported device will result in an InvalidOperationException being thrown.

Device transition duration

The following methods of the ILight object have overloads that take a uint parameter used to specify the duration in milliseconds for the transition.

• SetPowerAsync(Power)
• OffAsync()
• OnAsync()
• SetBrightnessAsync(Percentage)
• SetTemperatureAsync(Temperature)
• SetColorAsync(Color)

Task cancellation

The following methods of the LightFactory and ILight object have overloads that take a CancellationToken parameter used to cancel a running task.

LightFactory

• CreateLightAsync(IPAddress)

ILight

• GetStateAsync()
• SetLabelAsync(Label)
• SetPowerAsync(Power)
• OffAsync()
• OnAsync()
• SetBrightnessAsync(Percentage)
• SetTemperatureAsync(Temperature)
• SetColorAsync(Color)

Note: all requests will be cancelled if the device does not respond after 5 seconds.