PIR Motion sensor

richardh151

Im trying to add a LED strip WS2812B to my python script which switches on and off at the same time as my motion sensor is activated. Whilst there are many scripts out there I struggle to incorporate one into what i have that currently works, can anyone help. My LED GPIO Pin is 17. Any help is appreciated

This is my current script,

from gpiozero import MotionSensor
from subprocess import call
from time import sleep

Time to wait until display should turn off after last motion detected

timeUntilDisplayOff = 600

The GPIO data pin to which the PIR sensor is connected

pin = 4

pir = MotionSensor(pin)
timer = timeUntilDisplayOff

while True:

if pir.motion_detected:
	timer = timeUntilDisplayOff
	print ("Motion detected! Setting timer to " + str(timer) + " seconds.")
	
if timer > 0:
	if timer % 10 == 0:
		print ("Timer: " + str(timer) + " seconds")
	timer -= 1

elif timer == 0:
	call(['vcgencmd', 'display_power', '0'])

	print ("Timer is 0. Display turned off. Waiting for motion...")
	# display is now off. we wait for motion and turn it on
	pir.wait_for_motion()
	call(['vcgencmd', 'display_power', '1'])
	timer = timeUntilDisplayOff

sleep(1)

Kimzer

Interested in the very same thing! But i am trying to make my HUE light strip turn/on off as the screen already does.

I found this Hue motion

richardh151

@Kimzer thanks but as a novice the suggested scripts blew my mind and seems much more complicated to what I’m currently using. I’m sure there is a way to modify it to switch on the led strip at the same time as the monitor jumps to life from the PIR motion sensor. I have a RPi3 and have it connected but struggle with the script which I’m sure is easy for someone else.

Kimzer

@Kimzer said in LED Backlight for mirror - PIR to control them:

Found this hue motion but i couldnt get it to run.
Anyone that has some input?

So i managed to do this. Its probably quite a dirty fix. And only setup to work with phillips hue bulbs/strips. But if u want to know shoot me a pm and ill show it. (Y)

orayoflighto

@richardh151

Have you seen this?
https://forum.magicmirror.builders/post/26789

cowboysdude

@richardh151 Here’s a VERY simple one…

https://github.com/cowboysdude/Pir-Sensor

richardh151

@orayoflighto what you show is exactly what I need, however struggling with MMM pir Sensor module as my MM shows a conf.js error. So can’t get beyond that. I also have the RGB WS2812B led strips which I discovered r more problematic to control. I feel as though I tried many things but still frustrated with non functioning lights.

richardh151

This post is deleted!

richardh151

@orayoflighto I’m struggling with MMM PIR Sensor and constantly get a black screen, this is my coming input, can you advise if I’m doing anything obviously wrong, thanks

module: ‘MMM-PIR-Sensor’,
config: {
sensorGpio: 4, // This is the GPIO port number, not the header pin number
relayGpio: false, // This is the GPIO port number, not the header pin number
powerSaving: true,
relayOnState: 1,
relayOffState: 0,
turnOffAfterSeconds: 30,
debug: false
}
},

orayoflighto

Usually a black screen means that you have an error in your configuration file. Make a backup and remove as many lines as you can. Make sure you have the right GPIO pin. That can be confusing because it is different than the actual PIN number. Make sure you are also looking at a GPIO readout for a Pi 3 as the GPIOs are a little different depending on what version of the Pi you have.