Got this up and running thanks to @karsten13 's help with screen blanking. Also had start-up issues as detailed here.

Runs on a RPi 4B I had lying around with MagicMirrorOS driving the fabulous RPi monitor with a PIR sensor to sense people in the room for screen blanking. Viewing angle on this screen is very impressive, very sharp and crisp display.

The Pi is in the boiler cupboard and wiring is hidden in 25x16mm trunking painted to match the wall. PIR sensor is in the tiniest project box I could find. Screen is on a VESA mount.

MagicMirror modules:

• MMM-Universal-Pir - controlling HDMI for screen sleep
• clock
• calendar - hidden, pulling UK Holidays and Family Google calendar feeding:
• MMM-CalendarExt3Agenda with CSS mods so it fills most of the screen
• MMM-MyGarbage
• weather showing current and forecasts from UK met office
• newsfeed showing BBC news

@karsten13 perfect, thank you. The Docker container has gpiomon at v2.2.1. It never occurred to me the container would update things unannounced!

Many thanks for your help

Steve

magicm@magicmirror:/opt/mm/mounts/config $ gpiomon --help
Usage: gpiomon [OPTIONS] <chip name/number> <offset 1> <offset 2> ...

Wait for events on GPIO lines and print them to standard output

Options:
  -h, --help:           display this message and exit
  -v, --version:        display the version and exit
  -l, --active-low:     set the line active state to low
  -B, --bias=[as-is|disable|pull-down|pull-up] (defaults to 'as-is'):
                set the line bias
  -n, --num-events=NUM: exit after processing NUM events
  -s, --silent:         don't print event info
  -r, --rising-edge:    only process rising edge events
  -f, --falling-edge:   only process falling edge events
  -b, --line-buffered:  set standard output as line buffered
  -F, --format=FMT      specify custom output format

Biases:
  as-is:        leave bias unchanged
  disable:      disable bias
  pull-up:      enable pull-up
  pull-down:    enable pull-down

Format specifiers:
  %o:  GPIO line offset
  %e:  event type (0 - falling edge, 1 rising edge)
  %s:  seconds part of the event timestamp
  %n:  nanoseconds part of the event timestamp
magicm@magicmirror:/opt/mm/mounts/config $ gpiomon -v
gpiomon (libgpiod) v1.6.3
Copyright (C) 2017-2018 Bartosz Golaszewski
License: LGPLv2.1
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

-r is listed in the library help for v1.6.3

The Docker log shows
[2026-02-10 11:30:10.955] [ERROR] [MMM-Universal-Pir] stderr: gpiomon: invalid option -- 'r' gpiomon: try gpiomon --help

but gpiomon -r -b gpiochip0 23 works in a terminal when pasted from the config.js file, very strange

It’s just stopped working!

Steve

Hi

With no warning (I haven’t carried out any updates) MMM-Universal-Pir is now failing. It shows under the ‘PIR SENSOR’ heading on the MM screen ‘gpioCommand exited with error!’

Config is:

                    module: "MMM-Universal-Pir",
                        position: "bottom_right",
                        config: {
                            gpioCommand: "gpiomon -r -b gpiochip0 23",
                            onCommand: "wlr-randr --output HDMI-A-1 --on --transform 90",
                            offCommand: "wlr-randr --output HDMI-A-1 --off",
                            deactivateDelay: 120 * 1000,
                            }

and in a terminal gpiomon -r -b gpiochip0 23 shows events when the PIR is triggered and

wlr-randr --output HDMI-A-1 --on --transform 90 and wlr-randr --output HDMI-A-1 --off still control the screen.

gpiomon is v1.6.3

What can have changed?

Steve

Got this up and running thanks to @karsten13 's help with screen blanking. Also had start-up issues as detailed here.

Runs on a RPi 4B I had lying around with MagicMirrorOS driving the fabulous RPi monitor with a PIR sensor to sense people in the room for screen blanking. Viewing angle on this screen is very impressive, very sharp and crisp display.

The Pi is in the boiler cupboard and wiring is hidden in 25x16mm trunking painted to match the wall. PIR sensor is in the tiniest project box I could find. Screen is on a VESA mount.

MagicMirror modules:

• MMM-Universal-Pir - controlling HDMI for screen sleep
• clock
• calendar - hidden, pulling UK Holidays and Family Google calendar feeding:
• MMM-CalendarExt3Agenda with CSS mods so it fills most of the screen
• MMM-MyGarbage
• weather showing current and forecasts from UK met office
• newsfeed showing BBC news

@karsten13 thank you for all the effort you are putting into this issue. I agree, let’s go back to the version that will kill and restart the container if the display doesn’t respond to wlr-randr (and then waits for a MMM-Universal-Pir cycle to sleep it again).

Steve

@karsten13 unfortunately that didn’t work.
In the morning the screen was off and could not be restored with docker rm -f labwc && docker compose up -d or docker compose up -d --force-recreate. In both cases the console briefly came back and then the the monitor slept again. Only when i when into the labwc container and did wlr-randr --output HDMI-A-1 --on --transform 90 did the display return. At that point the MMM-Universal-Pir started counting down too and it works as normal.

magicm@magicmirror:/opt/mm/run $ docker rm -f labwc && docker compose up -d
labwc
[+] Running 2/2
 ✔ Container mm     Running                                                                                        0.0s
 ✔ Container labwc  Started                                                                                        0.5s
magicm@magicmirror:/opt/mm/run $ docker compose up -d --force-recreate
[+] Running 2/2
 ✔ Container mm     Started                                                                                        1.7s
 ✔ Container labwc  Started                                                                                        1.8s
magicm@magicmirror:/opt/mm/run $
     >>> still no screen output <<<
magicm@magicmirror:/opt/mm/run $ docker exec -it labwc bash
pi@3f4fb5c07c91:/$ wlr-randr
HDMI-A-1 "Raspberry PI RPI MON156 81005568472 (HDMI-A-1)"
  Make: Raspberry PI
  Model: RPI MON156
  Serial: 81005568472
  Physical size: 350x190 mm
  Enabled: no
  Modes:
    1920x1080 px, 60.000000 Hz (preferred)
    1920x1080 px, 60.000000 Hz
    1920x1080 px, 59.939999 Hz
    1920x1080 px, 50.000000 Hz
    1920x1080 px, 48.000000 Hz
    1920x1080 px, 47.952000 Hz
    1280x720 px, 60.000000 Hz
    1280x720 px, 60.000000 Hz
    1280x720 px, 59.939999 Hz
    1280x720 px, 50.000000 Hz
    1280x720 px, 48.000000 Hz
    1280x720 px, 47.952000 Hz
    720x576 px, 50.000000 Hz
    720x480 px, 60.000000 Hz
    720x480 px, 59.939999 Hz
    640x480 px, 60.000000 Hz
    640x480 px, 59.939999 Hz
    640x480 px, 59.939999 Hz
pi@3f4fb5c07c91:/$ wlr-randr --output HDMI-A-1 --on --transform 90
     >>> screen returns <<<
pi@3f4fb5c07c91:/$

Please check I did the pull etc correctly

magicm@magicmirror:/opt/mm $ git status
On branch master
Your branch is up to date with 'origin/master'.

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
        modified:   install/install.sh

Untracked files:
  (use "git add <file>..." to include in what will be committed)
        install/install.sh.old
        run/douglas.env

no changes added to commit (use "git add" and/or "git commit -a")
magicm@magicmirror:/opt/mm $ git switch develop
M       install/install.sh
branch 'develop' set up to track 'origin/develop'.
Switched to a new branch 'develop'
magicm@magicmirror:/opt/mm $ git pull
remote: Enumerating objects: 32, done.
remote: Counting objects: 100% (32/32), done.
remote: Compressing objects: 100% (22/22), done.
remote: Total 22 (delta 14), reused 0 (delta 0), pack-reused 0 (from 0)
Unpacking objects: 100% (22/22), 2.66 KiB | 247.00 KiB/s, done.
From https://gitlab.com/khassel/magicmirror
   f4542dd..4891458  develop    -> origin/develop
   a4a4748..c4bb59c  master     -> origin/master
 * [new tag]         v2.31.0    -> v2.31.0
Updating f4542dd..4891458
Fast-forward
 .gitlab-ci.yml            |  2 +-
 build/labwc/Dockerfile    |  2 +-
 build/labwc/entrypoint.sh | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++--------
 run/includes/labwc.yaml   |  4 +++-
 run/original.env          |  4 ++--
 5 files changed, 57 insertions(+), 13 deletions(-)
magicm@magicmirror:/opt/mm $ cd /opt/mm/run
magicm@magicmirror:/opt/mm/run $ docker compose pull
[+] Pulling 15/15
 ✔ labwc Pulled                                                                                                  107.9s
   ✔ f07a03696dcc Already exists                                                                                   0.0s
   ✔ 98d9f29a8bdf Pull complete                                                                                  106.0s
   ✔ 6c9aae6d02f4 Pull complete                                                                                  106.1s
   ✔ 9d496899b308 Pull complete                                                                                  106.2s
 ✔ magicmirror Pulled                                                                                            171.5s
   ✔ d9b636547744 Already exists                                                                                   0.0s
   ✔ 2fb5eed0caf7 Already exists                                                                                   0.0s
   ✔ f51205ec4ac4 Already exists                                                                                   0.0s
   ✔ d7b57be0135b Already exists                                                                                   0.0s
   ✔ 813d7d6819ab Already exists                                                                                   0.0s
   ✔ 9e1af87e1f78 Pull complete                                                                                    1.1s
   ✔ 27001e96a2b0 Pull complete                                                                                    1.3s
   ✔ deb26dbf1268 Pull complete                                                                                  110.8s
   ✔ 1b7abece8518 Pull complete                                                                                  169.7s
magicm@magicmirror:/opt/mm/run $ docker compose up -d --force-recreate
[+] Running 2/2
 ✔ Container labwc  Started                                                                                       24.9s
 ✔ Container mm     Started

Steve

@karsten13 I thought that would be the case. I tried changing the initial RANDR_PARAMS="--output HDMI-A-1 --transform 90" in the .env file to RANDR_PARAMS="--output HDMI-A-1 --off" so that the MMM-Universal-Pir module would be responsible for the first switch on of the display but then I got no display on restart at all.

Steve

@karsten13, thank you for this. It worked well overnight last night. One question: when the wlr-randr command fails, the labwc container is then killed and then automatically restarts - will the screen be turned on then until the next PIR activity and subsequent timeout of MMM-Universal-Pir?

Steve