An API for the LEDENET Magic UFO LED WiFi Controller

This RGB LED controller is a relatively cheap (~$30) alternative to something like the Phillips Hue RGB Strip + Hub, which can run you between $100 and $200.

However, it doesn't come with an open API, and doesn't integrate with smarthome hubs (SmartThings, etc.). I used a packet capture app on my phone to reverse engineer how the official app communicated with the controller.

ledenet_api is available on Rubygems. You can install it with:

$ gem install ledenet_api

You can also add it to your Gemfile:

gem 'ledenet_api'

These devices implement a service discovery protocol, which allows you to find them on your network without digging for their IP address. To use it:

require 'ledenet_api'
devices = LEDENET.discover_devices
=> [#<LEDENET::Device:0x007feccc0241d8 @ip="10.133.8.113", @hw_addr="XXXXXXXXXXXX", @model="HF-LPB100-ZJ200">]
devices.first.ip
=> "10.133.8.113"

By deafult, discover_devices waits for up to 5 seconds for a single device to respond, and returns immediately after finding one. To change this behavior:

irb(main):005:0> LEDENET.discover_devices(expected_devices: 2, timeout: 1)
=> [#<LEDENET::Device:0x007fff328f4330 @ip="10.133.8.113", @hw_addr="XXXXXXXXXXXX", @model="HF-LPB100-ZJ200">]

To construct an API class, use the following:

api = LEDENET::Api.new('10.133.8.113')

By default, each API call will open a new connection, and close it when it's finished. This is convenient if the API is being used inside of a long-running process (like a web server). If what you're doing is more short-lived, you can reuse the same connection:

api = LEDENET::Api.new('10.133.8.113', reuse_connection: true)

By default, the API will re-try transient-looking failures three times. You can change this behavior with:

api = LEDENET::Api.new('10.133.8.113', reuse_connection: true, max_retries: 0)

To check if the controller is currently on:

api.on?
=> false

To turn the controller on and off:

api.on
=> true
api.off
=> true

To get the current color setting (as an array of RGB values):

api.current_color
=> [10, 10, 10]

To set the color:

api.update_color(255, 0, 255)
=> true

This controller is also capable of controling Warm White (WW) LEDs. I didn't have a strip to test, but I'm pretty sure I found out how to control it. If this would be useful to you, please open an issue/pull request.