Demonstrating how to use Raspberry Pi 5 GPIO pins in a Docker container

#Raspberry Pi 5 GPIO in a Docker container.md

This gist demonstrates how to access the Raspberry Pi 5 GPIO pins inside a docker container without the need to run Docker with --privileged

Copy Dockerfile and gpiod-test.py onto your host, then run

docker build -t gpiotest . && docker run -it --device /dev/gpiochip4:/dev/gpiochip4 gpiotest

Dockerfile

FROM debian:latest

RUN apt update && apt install -y python3 python3-libgpiod

COPY "./gpiod-test.py" "/gpiod-test.py"

CMD ["python3", "gpiod-test.py"]

gpiod-test.py

import gpiod
from time import sleep

LED_PIN = 17

chip = gpiod.Chip('gpiochip4')
led_line = chip.get_line(LED_PIN)
led_line.request(consumer="LED", type=gpiod.LINE_REQ_DIR_OUT)

try:
   while True:
       led_line.set_value(1)
       sleep(0.5)
       led_line.set_value(0)
finally:
   led_line.release()

Traceback (most recent call last):
File "//gpiod-test.py", line 6, in
chip = gpiod.Chip('gpiochip4')
File "/usr/lib/python3/dist-packages/gpiod/chip.py", line 58, in init
self._chip = _ext.Chip(path)
~~~~~~~~~^^^^^^
FileNotFoundError: [Errno 2] No such file or directory