PIR sensor in combination with IR transmitter

erwindenboer

Hello,

For my first Magic Mirror, I want to use an old TV that I have lying around. My TV uses Simplelink (CEC), so commands can be sent to my TV to turn on. Unfortunately, it can’t turn off using Simplelink (CEC). To solve this, I want to use an IR led. I also have an PIR sensor. So what I want is when a person moves in front of the PIR sensor, a signal will be transmitted via the IR led to my TV to turn on. After a certain amount of time, I want the Raspberry Pi to signal to the TV to turn off. I couldn’t find a module which does this. I hope someone has an idea how to realize this idea.

Kind regards.

sdetweil

@erwindenboer you don’t need a module to do this. or anything MagicMirror

most of the pir support is in python, and I’m sure u can find python support for sending the led signal.

then is wait and launch the shutdown command

you should be able to build this as a bash script

#!/bin/bash
python command to read the pir
python command to send the led signal
sleep n seconds
shutdown now -h

if you use pm2 to start mm, you can also use it to start this bash script

reference
pir
https://www.deviceplus.com/raspberry-pi/using-pir-motion-sensors-with-the-raspberry-pi-and-python/

send ir
https://www.raspberrypi.org/forums/viewtopic.php?t=79978

sdetweil

@erwindenboer also, make sure there is a good delay on the pir sensor. you’d be amazed how easy it is to trip the durned thing.

erwindenboer

@sdetweil Thanks for your fast reply. I will test this out next week. Then I will come back to you to let you know if I have more questions or if I solved it. I really appreciate it!