Ben Nuttall is the Community Manager at Raspberry Pi  and has with Dave Jones (GitHub) done some extraordinary work with GPIO Zero to produce a simple and lightweight interface to GPIO devices , all based on python. GPIOZero is obviously specific to the Raspberry Pi and works across all models of Pi including the newest PiZeroW for as long as you run a flavour of Raspian. It comes pre-installed with Raspian Jessie but if you have an older or different version of linux see this page for manual installation (including PC/Mac Remote GPIO). Let’s quickly compare a ‘traditional python script’ and  a GPIO Zero script for the same function(s) – blinking an LED:

1st a conventional python script;

## Import time and GPIO library

import time
import RPi.GPIO as GPIO 

## Use board pin numbering and set GPIO Pin 17 to OUTGPIO.setmode(GPIO.BOARD)
GPIO.setup(11, GPIO.OUT)
while True:
      GPIO.output(17,True)             ## Turn on Led
      time.sleep(1)                    ## Wait for one second
      GPIO.output(17,False)            ## Turn off Led
      time.sleep(1)                    ## Wait for one second

Lets compare this to the equivalent using the GPIO Zero library;

from gpiozero import LED
from time import sleep

led = LED(17)

while True:

This is ultimately so much more ‘readable’ for the beginner programmer – I say ‘NO CONTEST’ – GPIO Zero rocks !!


GPIO Zero homepage.

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