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Nerves.Leds

Simple API to drive leds exposed by linux /sys/class/leds. Designed for use with Nerves, but works on any distribution of Linux with /sys/class/leds.

Installation

Add nerves_leds to your list of dependencies in mix.exs:

def deps do
  [{:nerves_leds, "~> 0.8.1"}]
end

Configuration & Usage

Configure your LEDs mappings:

# config/config.exs
config :nerves_leds, names: [ error: "led0", connect: "led1" ]

Now, you can use predefined states in your app:

alias Nerves.Leds

Leds.set(connect: true)
Leds.set(connect: :heartbeat)
Leds.set(connect: false, error: :slowblink)

You can also define your own states:

# config/config.exs
config :nerves_leds, states: [
    fastblink: [ trigger: "timer", delay_off: 40, delay_on: 30 ],
    blip: [ trigger: "timer", delay_off: 1000, delay_on: 100 ]]

For situations where the number of LEDs are not known at compile time, you can enumerate the LEDs:

Leds.enumerate()

More Details

See the documentation for the full description of the API and configuration.