Raspberrypi with custom flash light

photoflash.rb

#!/usr/bin/env ruby

# @rivsc / http://blog.escarworld.com
require 'rpi_gpio'

PIN_NUM = 12

RPi::GPIO.set_numbering :board
RPi::GPIO.setup PIN_NUM, :as => :output

# Active le relais
RPi::GPIO.set_low PIN_NUM
`raspistill -vf -hf -n -ss 30000 -sh 70 -q 95 -t 50 -o photo_#{Time.now.strftime('%Y-%m-%d_%H-%M')}.jpg`
# Déactive le relais (retrouve son état normal)
RPi::GPIO.set_high PIN_NUM