Example GPIO¶

The reference filesystem includes libgpiod and the tool utilities that can be run from the command line to access GPIO pins:

• gpiodetect - list all gpiochips present on the system, their names, labels
  and number of GPIO lines

• gpioinfo - list lines, their gpiochip, offset, name, and direction, and
  if in use then the consumer name and any other configured
  attributes, such as active state, bias, drive, edge detection
  and debounce period

• gpioget - read values of specified GPIO lines

• gpioset - set values of specified GPIO lines, holding the lines until the
  process is killed or otherwise exits

• gpiomon - wait for edge events on GPIO lines, specify which edges to watch
  for, how many events to process before exiting, or if the events
  should be reported to the console