GPIOD User Guide

This document lists the common gpiod commands for Quectel Pi M1/L1. The checked board uses libgpiod v1.6.3, so this page uses v1 syntax.

Install and Check

sudo apt update
sudo apt install -y gpiod
gpiodetect --version
gpiodetect
gpioinfo

Command	Purpose
gpiodetect	View GPIO controllers
gpioinfo	View GPIO line status and usage/ownership
gpioget	Read input state
gpioset	Set output state
gpiomon	Monitor edge events

Controller Example

gpiochip0 [400000.pinctrl] (114 lines)
gpiochip1 [1c40000.qcom,spmi:qcom,pm6125@0] (9 lines)
gpiochip2 [soc:spf_core_platform:lpi_pinct] (19 lines)

Common Commands

# Show main controller lines
gpioinfo /dev/gpiochip0

# Read line 36 on gpiochip0
gpioget gpiochip0 36

# Drive high for 5 seconds
gpioset --mode=time --sec=5 gpiochip0 36=1

# Monitor rising edge events
gpiomon --rising-edge gpiochip0 36

Version Difference

Function	Current M1 v1 Syntax	Syntax That May Appear in Newer Materials
Read	gpioget gpiochip0 36	gpioget -c gpiochip0 36
Output hold	gpioset --mode=time --sec=5 gpiochip0 36=1	gpioset -c gpiochip0 -p 5s 36=1
Rising-edge monitoring	gpiomon --rising-edge gpiochip0 36	gpiomon -c gpiochip0 -e rising 36

Notes

• GPIO line offset is not the physical header pin number.

• Do not control lines marked with [used] or an existing consumer.

• After gpioset exits, output state may return to default; do not rely on residual level.