Home > Python Interface for GPIO Circuits

• Introduction
• Examples

Introduction

Whereas the lower-level RPi.GPIO package deals with GPIO input/output pins and high/low values, the present package deals with LEDs that are on or off, button switches that are pressed or not, and so on. These abstractions, in combination with an event-driven framework, allow the developer to express the intended circuit behavior more naturally compared with lower-level interfaces.

Examples

For example, a blinking LED program is written as follows:

import time
from raspberry_py.gpio import setup, cleanup
from raspberry_py.gpio.lights import LED

setup()

# create an led on output pin 11
led = LED(output_pin=11)

# set on for 1 second then off
led.turn_on()
time.sleep(1)
led.turn_off()

cleanup()

A button-switched LED is shown below:

import time

from raspberry_py.gpio import setup, cleanup
from raspberry_py.gpio.lights import LED
from raspberry_py.gpio.controls import TwoPoleButton

setup()

# create an led on output pin 11
led = LED(output_pin=11)

# create a button on input pin 12
button = TwoPoleButton(input_pin=12, bounce_time_ms=300)

# turn the led on when the button is pressed
button.event(lambda s: led.turn_on() if s.pressed else led.turn_off())

print('You have 20 seconds to press the button...')
time.sleep(20)

cleanup()

Buzzing LED bar with push button (click to watch; Python code here):

Python code for these and other examples can be found here.