gpio

Read GPIO pin state

$ gpio read [pin]

$ gpio write [pin] [0|1]

$ gpio mode [pin] [in|out|pwm]

$ gpio readall

$ gpio export [pin] [in|out]

$ gpio unexport [pin]

gpio [options] command [args]

gpio is the WiringPi command-line utility for controlling GPIO pins on Raspberry Pi and similar boards. It allows reading, writing, and configuring GPIO pins from shell scripts and the command line.
The tool supports multiple pin numbering schemes: WiringPi numbering, BCM GPIO numbering (-g), and physical pin numbers (-1).

read pin

Read pin value.

Write value (0 or 1) to pin.

Set pin mode: in, out, pwm, clock.

Display all GPIO pins status.

Export pin for user-space access.

Unexport pin.

Set PWM value (0-1023).

Use BCM GPIO numbering.

Use physical pin numbering.

WiringPi is deprecated but still functional. Different numbering schemes can cause confusion. Requires appropriate permissions. Pin capabilities vary by board. Some pins have special functions.

gpio is part of WiringPi, created by Gordon Henderson for Raspberry Pi GPIO access. While WiringPi was deprecated in 2019, it remains widely used. Alternatives include libgpiod and Python's RPi.GPIO.

gpiodetect(1), gpioset(1), gpioget(1), raspi-gpio(1)