<![CDATA[PIR sensor problem]]>I am trying to add a PIR sensor to the MM

i have wired it to a raspberry pi but having a problem executing the funciton control the lcd

getting an error, an idea

sudo chmod u+s /opt/vc/bin/tvservice && sudo chmod u+s /bin/chvt
chmod: cannot access ‘/opt/vc/bin/tvservice’: No such file or directory

]]>https://forum.magicmirror.builders/topic/16070/pir-sensor-problemRSS for NodeMon, 15 Jun 2026 07:42:45 GMTThu, 23 Dec 2021 07:24:07 GMT60<![CDATA[Reply to PIR sensor problem on Thu, 06 Jan 2022 15:43:30 GMT]]>@sultan-y
To get the PIR sensor working with MM on the currently latest Raspberry PI OS Bullseye you can use /usr/bin/vcgencmd display_power 0/1 instead of using the tvservice command (I run it in a script started by crontab at reboot).

I also

  • added /usr/bin/xrandr -display :0.0 --auto before the vcgencmd command
  • added user Pi to the gpio group: sudo usermod -a -G gpio pi, and I
  • added XAUTHORITY=/home/pi/.Xauthority here: sudo vi /etc/environment

My mirror uses a DVI to HMI output, but using xrandr and XAUTHORITY as above solved the issues I had.

Btw, I use

/usr/bin/chvt 6
/usr/bin/chvt 7

after the /usr/bin/vcgencmd display_power 1 command, but that was used prior to using Bullseye as well.

]]>https://forum.magicmirror.builders/post/98182https://forum.magicmirror.builders/post/98182Thu, 06 Jan 2022 15:43:30 GMT<![CDATA[Reply to PIR sensor problem on Fri, 24 Dec 2021 15:55:20 GMT]]>@sdetweil said in PIR sensor problem:

some of the newer pir modules support multiple ways

I love this style ;)

]]>https://forum.magicmirror.builders/post/97770https://forum.magicmirror.builders/post/97770Fri, 24 Dec 2021 15:55:20 GMT<![CDATA[Reply to PIR sensor problem on Fri, 24 Dec 2021 13:06:41 GMT]]>@sultan-y there are other approaches to turn off monitor

some of the newer pie modules support multiple ways

]]>https://forum.magicmirror.builders/post/97768https://forum.magicmirror.builders/post/97768Fri, 24 Dec 2021 13:06:41 GMT<![CDATA[Reply to PIR sensor problem on Fri, 24 Dec 2021 04:37:23 GMT]]>is there a workaround?

]]>https://forum.magicmirror.builders/post/97760https://forum.magicmirror.builders/post/97760Fri, 24 Dec 2021 04:37:23 GMT<![CDATA[Reply to PIR sensor problem on Thu, 23 Dec 2021 12:44:36 GMT]]>@sultan-y in raspios latest , bullseye, that function, tvservice, is no longer provided.,

]]>https://forum.magicmirror.builders/post/97748https://forum.magicmirror.builders/post/97748Thu, 23 Dec 2021 12:44:36 GMT