gpio.rb


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class Gpio
  def initialize(pin, prefix: "/sys/class/gpio")
    @pin = pin
    @prefix = prefix
  end

  attr_reader :pin, :prefix

  def export
    File.write("#{prefix}/export", pin)
    File.write("#{prefix}/gpio#{pin}/direction", "out")
  end

  def value
    File.read("#{prefix}/gpio#{pin}/value").strip == "1" ? true : false
  end

  def value=(value)
    File.write("#{prefix}/gpio#{pin}/value", value ? "1" : "0")
  end

  def toggle
    self.value = !value
  end
end