Trouble with PIR sensor

cruunnerr

Maybe with a relay? :)

take a look at point 5.2
https://forum.magicmirror.builders/topic/6291/howto-turn-on-off-your-monitor-time-based-pir-button-app?page=1

edit: but the normal MMM-PIR module can use a relay, too ;)

jheller333

This post is deleted!

jheller333

This post is deleted!

cruunnerr

Try these commands in the *.sh files:

vcgencmd display_power 1

and

vcgencmd display_power 0

I need to update my post ^^

jheller333

I don’t have a relay at the moment but I’m going to order one. In the mean time, I tried part 2 of your guide to test if I could get the PIR sensor working but it’s not. The HDMI port is disabled after 120 seconds of no presence in the sensor. When I wave my hand in front of the sensor to turn the pi back on, the HDMI port activates but I only get a black screen. Any suggestions for what to do?

cruunnerr

@jheller333

Look above :)

jheller333

I really appreciate the help. Been struggling with the PIR sensor for a week now. Is there a specific relay I should be looking for? I managed to get everything working with the PIR sensor, but once the TV turns off after there is no input detected, the PIR sensor can’t turn the tv back on. So it is not the most viable solution.

cruunnerr

did u try what i posted?

U said, u tried part 2 of the tutorial. So u should have a “monitor_on.sh” and a “monitor_off.sh”

Try to change the content to the following:

sudo vcgencmd display_power 1 for monitor_on.sh
sudo vcgencmd display_power 0 for monitor_off.sh

or

sudo tvservice -p && sudo chvt 9 && sudo chvt 7 for monitor_on.sh
sudo tvservice -o for monitor_off.sh

If these don’t work at all u should go for the relay.
U could use every relay u want, but u should search for a 3 - 5V relay because otherwise u need to install a transistor.
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313.TR0.TRC0.H0.Xraspberry+pi+relay.TRS0&_nkw=raspberry+pi+relay&_sacat=0

jheller333

I got a relay and followed your guide to connect it. The relay has an LED light on it but it doesn’t seem to trigger. I still have all the code setup for turning off the HDMI port with the PIR sensor, so I’m not sure if thats the problem. Any suggestions?

cruunnerr

@jheller333

Do u have a link to your relay? Do u hear it clicking?