MMM-Universal-Pir and cec-client

MM_Noob

Hi all…

Is anyone using MMM-Universal-Pir with cec-client to control the screen power status ?

I’m using a Samsung LED TV that doesnt cleanly handle wlr-randr calls, but CEC works flawlessly…

I can use cec-client on the cmdline to standby and powerup the screen with no issues…

When I put those cmds into MMM-Universal-Pir it doesn’t call them… So my config looks something like::

  onCommand: "echo 'on 0' | cec-client -s -d 1",
  offCommand: "echo 'standby 0' | cec-client -s -d 1",

I see the countdown timer reach 0 but the screen doesnt power off…

Anyone got this working ??

Thanks

sdetweil

@MM_Noob I don’t know for his module, but my MMM-SleepWake can do cec, using debug

are there any messages in the log where npm start is done?
if using pm2 to launch, see the output of

pm2 logs --lines=xxx
xxx is the number of most recent log lines, default 15

sleep

[2025-07-05 10:14:22.267] [LOG]   motion detected from external source 
[2025-07-05 10:14:22.268] [LOG]   !e: motionend 
[2025-07-05 10:14:22.268] [LOG]   idle timer started for 1 minutes 
[2025-07-05 10:15:16.088] [LOG]   sleep-wake helper in socket notification=start_sleep 
[2025-07-05 10:15:16.089] [LOG]   processing start sleep 
[2025-07-05 10:15:16.089] [LOG]   using CEC approach ()='echo standby 0 | cec-client -s' 
[2025-07-05 10:15:22.270] [LOG]   sleep-wake helper in socket notification=start_sleep 
[2025-07-05 10:15:22.271] [LOG]   processing start sleep 
[2025-07-05 10:15:22.271] [LOG]   start sleep, already sleeping

wake up

[2025-07-05 10:15:42.503] [LOG]   motion detected from external source 
[2025-07-05 10:15:42.504] [LOG]   !s: motionstart 
[2025-07-05 10:15:42.505] [LOG]   sleep-wake helper in socket notification=end_sleep 
[2025-07-05 10:15:42.506] [LOG]   waking up 
[2025-07-05 10:15:42.506] [LOG]   waking up using CEC approach='echo on 0 | cec-client -s'

karsten13

@MM_Noob

I have no hardware to reproduce but maybe this helps for debugging:

Go to an empty dir and execute npm init -y, then write a file index.js with content:

const { exec } = require('node:child_process');

const onCommand = "echo 'on 0' | cec-client -s -d 1 > test.log";

console.dir(onCommand);

exec(onCommand, (error, stdout, stderr) => {
  if (error) {
    console.error(`exec error: ${error}`);
    return;
  }
  console.log(`stdout: ${stdout}`);
  console.error(`stderr: ${stderr}`);
});

Now run node index.js and look into presented output and into the file test.log. You can play with the content of onCommand, maybe you find what’s going wrong.

MM_Noob

OK - post the update to include the cec-utils in the build I can confirm it now works…

I escaped the special chars initially in the cec-client call- but it works without them being escaped also

I guess this update will be rolled into the latest release at some point ?

Many thanks

karsten13

@MM_Noob

@MM_Noob said in MMM-Universal-Pir and cec-client:

OK - post the update to include the cec-utils in the build I can confirm it now works…

don’t understand, are you talking about this?

@MM_Noob said in MMM-Universal-Pir and cec-client:

I guess this update will be rolled into the latest release at some point ?

which update, which release?