Raspberry Pi的GPIO包装器安装 npm install -S node-pi-gpio 用法 L chika npm run example:l_chika 


GPIO = require 'node-pi-gpio'

pin = 24

time = 500



_loop = (gpio, val) -> 

    gpio.value val

    setTimeout _loop, time, gpio, (unless val then 1 else 0)



GPIO.open pin, 'out'

.then (gpio) ->

    process.on 'SIGINT', ->

        gpio.value 0

        gpio.close()

        .then -> process.exit()

    _loop(gpio, 1)

return