Controlling Raspberry Pi's GPIO with Python

blink.go

package main

import (
        "fmt"
        "os"
        "os/signal"
        "time"

        "github.com/davecheney/gpio"
)

func main() {
        // set GPIO25 to output mode
        pin, err := gpio.OpenPin(2, gpio.ModeOutput)
        if err != nil {
                fmt.Printf("Error opening pin! %s\n", err)
                return
        }

        // turn the led off on exit
        c := make(chan os.Signal, 1)
        signal.Notify(c, os.Interrupt)
        go func() {
                for _ = range c {
                        fmt.Printf("\nClearing and unexporting the pin.\n")
                        pin.Clear()
                        pin.Close()
                        os.Exit(0)
                }
        }()

        for {
                pin.Set()
                time.Sleep(100 * time.Millisecond)
                pin.Clear()
                time.Sleep(100 * time.Millisecond)
        }
}

led.py

import RPi.GPIO as GPIO
import time

PIN = 3
INTERVAL = 1.0

def main():
    GPIO.setmode(GPIO.BOARD)
    GPIO.setup(PIN, GPIO.OUT)

    while True:
        GPIO.output(PIN, 1)
        time.sleep(INTERVAL)

        GPIO.output(PIN, 0)
        time.sleep(INTERVAL)


if __name__ == '__main__':
    try:
        main()
    except KeyboardInterrupt:
        GPIO.cleanup()