{HowTo} turn on/off your monitor (Time based, PIR/Button, App)

MadScientist

What independent PIR are using now? Can give me link? I was looking into it too, but couldn’t find one that runs on 12V only. They all have 230V input and 12V output. That’s not working for me.
When you used the PIR with the GPIO pins, did you use a ferrit ring with it? Apparently that can help. I also had phantom triggers when I only used the PIR (without relay) and the MMM-PIR-sensor module. The ferrit ring resolved the phantom triggers for me 100%. Just now with the python script and the relay I get them very randomly. Sometimes after 2 minutes, sometimes after 2 hours.

cruunnerr

Thats how i tested and it works like a charm. I just set up a fresh raspbian stretch Desktop.
There was no need to install wiring-pi! the scripts just ran “out of the box”.

PIR: https://www.amazon.de/Aukru-HC-SR501-Menschliche-Pyroelektrizität-Bewegungssensor/dp/B00R2U8LLG

randomnoise

@MadScientist I went with this one. Only thing is it ain’t pretty so I’m looking to build it in to a nicer enclosure to increase the WAF.

I didn’t try using a ferrite ring, but I’ve got a few kicking around. Maybe worth a go.

link text

randomnoise

Should say, I’m just switching the ac in for monitor power directly…

MadScientist

This is how my setup looks like at the moment:
alt text
Relay: Black = GND, white = Vcc 3.3V, green = IN
PIR: Black = GND, red = Vcc, green = out

Gray, blue, puple = ds18b20 temperature sensor.

I actually haven’t had a false trigger yet and the Pi is running for more than an hour now. I will keep it running the whole day. Have a multimeter connected to the relay, set to continuity test, so I should hear a beeping sound every time the relay gets triggered.

cruunnerr

@MadScientist

sounds like a good plan :)

edit:
i also made changes to the scripts so now u were able to end them via “ctrl+c”.
Don’t know if i did everything correct but it works here. :)
I am just electronics technician and no programer ^^

hoofta

I got really excited to see this post when it was shared a few weeks ago. Unfortunately, I have yet to get it to work. I am using a PIR sensor along with Paviro’s module. My issue is that I am using an LG TV which, when the signal is no longer received from the HDMI port, a “no signal” screensaver bounces around. So my goal is to get the screen to just go to black while the raspberry pi does not enter a power-save mode.

I have attempted to use the “screen_off/on” option original provided instead of the “monitor_on/off” but it doesn’t seem to be working properly.

I have tested that the PIR is connected but in my test it keeps teling me that motion is detected when there is no movement. I am doing this through a python script. I am fairly new at this so if anyone can please let me know what else I can provide you to help me get this thing working with the PIR sensor. Thanks.

MadScientist

@hoofta Couldn’t you use a relay (like me) but instead of disconnecting the power you just trigger the power on/off button?

hoofta

@MadScientist I am not sure if I could or not. Could you elaborate on how you have yours setup?

MadScientist

@hoofta My mirror isn’t done yet but in my case the relay will disconnect the power from the power supply to the LCD. I have no idea what TV you’re using but you could solder 2 wires to the power button of your TV and connect them to a relay, which will be triggered by a PIR motion sensor.