gpiomon(1)
| GPIOMON(1) | gpiomon | GPIOMON(1) |
NAME
gpiomon - libgpiod command-line utility
SYNOPSIS
gpiomon [OPTIONS] <line>...
DESCRIPTION
Wait for events on GPIO lines and print them to standard output.
Lines are specified by name, or optionally by offset if the chip option is provided.
OPTIONS
- display a banner on successful startup
- -b, --bias <bias>
- specify the line bias Possible values: 'pull-down', 'pull-up', 'disabled'. (default is to leave bias unchanged)
- --by-name
- treat lines as names even if they would parse as an offset
- -c, --chip <chip>
- restrict scope to a particular chip
-C, --consumer <name> consumer name applied to requested lines (default is 'gpiomon')
- -e, --edges <edges>
- specify the edges to monitor Possible values: 'falling', 'rising', 'both'. (default is 'both')
- -E, --event-clock <clock>
- specify the source clock for event timestamps Possible values: 'monotonic', 'realtime', 'hte'. (default is 'monotonic') By default 'realtime' is formatted as UTC, others as raw u64.
- -h, --help
- display this help and exit
- -F, --format <fmt>
- specify a custom output format
- --idle-timeout <period>
- exit gracefully if no events occur for the period specified
- -l, --active-low
- treat the line as active low, flipping the sense of rising and falling edges
- --localtime
- format event timestamps as local time
- -n, --num-events <num>
- exit after processing num events
- -p, --debounce-period <period>
- debounce the line(s) with the specified period
- -q, --quiet
- don't generate any output
- -I, --initial-state
- print initial states of the lines
- -N, --numeric
- display line values as '0' (inactive) or '1' (active)
- -s, --strict
- abort if requested line names are not unique
- --unquoted
- don't quote line or consumer names
- --utc
- format event timestamps as UTC (default for 'realtime')
- -v, --version
- output version information and exit
Chips:
- A GPIO chip may be identified by number, name, or path. e.g. '0', 'gpiochip0', and '/dev/gpiochip0' all refer to the same chip.
Periods:
- Periods are taken as milliseconds unless units are specified. e.g. 10us. Supported units are 'm', 's', 'ms', and 'us' for minutes, seconds, milliseconds and microseconds respectively.
Format specifiers:
- %o
- GPIO line offset
- %l
- GPIO line name
- %c
- GPIO chip name
- %e
- numeric edge event type ('1' - rising or '2' - falling)
- %E
- edge event type ('rising' or 'falling')
- %S
- event timestamp as seconds
- %U
- event timestamp as UTC
- %L
- event timestamp as local time
AUTHOR
Bartosz Golaszewski <brgl@kernel.org>
REPORTING BUGS
Report bugs to:
Bartosz Golaszewski <brgl@kernel.org>
linux-gpio <linux-gpio@vger.kernel.org>
COPYRIGHT
Copyright © 2017-2023 Bartosz Golaszewski License:
GPL-2.0-or-later
This is free software: you are free to change and redistribute it. There is NO
WARRANTY, to the extent permitted by law.
| July 2026 | gpiomon v2.3.1 (libgpiod v2.2.1) |