🛠 GPIO en Python avec python3-libgpiod sur Le Potato

Objectives

Control an LED in Python on the Le Potato using the gpiod module provided by the distribution package python3-libgpiod — the officially documented path by Libre Computer to replace RPi.GPIO tutorials.

Hardware

• Le Potato AML-S905X-CC running Armbian or mainline Debian/Ubuntu
• LED + 330 Ω resistor on physical pin 3 (GPIOAO_5 = chip 0, line 5), ground connected to a GND pin
• sudo apt install python3-libgpiod — do NOT use pip install gpiod

Complete Code

#!/usr/bin/env python3
"""Clignotement broche 3 du Le Potato (chip 0, ligne 5). python3-libgpiod 1.x."""
import gpiod
import time

with gpiod.Chip("0") as chip:            # /dev/gpiochip0
    line = chip.get_lines([5])
    line.request(consumer="blink", type=gpiod.LINE_REQ_DIR_OUT)
    try:
        for _ in range(10):
            line.set_values([1])
            time.sleep(0.2)
            line.set_values([0])
            time.sleep(0.2)
    finally:
        line.release
print("Terminé")

Expected Verification

python3 blink.py turns the LED on and off 10 times. Running gpioinfo gpiochip0 during execution shows line 5 claimed by the consumer “blink”.

Common Errors

• module 'gpiod' has no attribute 'Chip': The pip package gpiod conflicts with python3-libgpiod; uninstall the pip package (pip uninstall gpiod) — this error is documented on the official hub.
• API v2: On recent distributions, the signatures of chip.get_line/line.request have changed; check the installed version before copying an example.
• Forgetting line.release: The line remains claimed and blocks other programs.
• Permission denied: Add the user to the gpio group or run as root.