@yo-less said in PIR sensor behind glass?:

Can a PIR sensor be covered by anything at all or does any kind of material automatically block motion detection?

Technically the sensor is covered by something, but that thing is the focusing Fresnel lens. Depending on the PIR you got, you’ll notice the plastic domed lens does come off rather easily.

“These curved segments are Fresnel lenses which constitute an array that increases the detection zone of the sensor. Fresnel lens array is known to capture more infrared radiation and focus it to a relatively smaller point. Detection is more stable and maximum distance for detection is also increased. Fresnel lens has been crafted to be translucent so that it can capture only infrared radiation without getting unwanted radiations from visible spectrum of light.”

Now the issue is that most glass and metals reflect IR wavelengths extremely well. So depending what the film/mirror backing is made out of may make your efforts mute. Aluminum which is used in most standard mirrors reflects all of the Infrared light in the spectrum.

So mounting it behind the mirror just doesn’t seem practical due to the way light works. So what I’m thinking of for me, is to mount it in a light fixture above the mirror. Not sure on the details yet but that’s where I am right now.
However the Camera trick does function very well and will give you that clean look.

great image at the bottom, I like it. well done.

so does your wife approve of the mirror? I saw that as a requirement but not as a comment at the end :P

Thanks for your help strawberry pi.

I was having additional issues with the code finding the img.
In case this helps someone else, this is what I ended up with:

{
			module: 'helloworld',
			position: 'top_left',
			config: {
				text: "<img src='./config/White.png' height='186' width='341'>"
			}
		} ,

I’m sure this shouldn’t be this hard but I’ve been stuck on it a few hours now. I’m trying to load a transparent background .png with a white image into the mirror.

I’ve tried loading it as a background img through the custom.css file, which worked except its in the background… (obviously)
body {
background-image: url(White.png");
background-repeat: no-repeat;
[/code]

So to get around the manual padding adjustment I’m wondering if there is a way to load in an img into the “Position: top_left” area so any modules also in that area auto adjust?

I also tried adding to the index.html but that simply resulted in an “X” broken link icon.

great image at the bottom, I like it. well done.

There is also this little beauty
https://www.pi-supply.com/product/gert-vga-666-hardware-vga-raspberry-pi/

it uses the gpio pins instead of the hdmi output.

that would be a good test, but just note you’ll be lowering its effective area. Which for a mirror might be fine, as you normally stand directly infront of it.

@yo-less said in PIR sensor behind glass?:

Can a PIR sensor be covered by anything at all or does any kind of material automatically block motion detection?

Technically the sensor is covered by something, but that thing is the focusing Fresnel lens. Depending on the PIR you got, you’ll notice the plastic domed lens does come off rather easily.

“These curved segments are Fresnel lenses which constitute an array that increases the detection zone of the sensor. Fresnel lens array is known to capture more infrared radiation and focus it to a relatively smaller point. Detection is more stable and maximum distance for detection is also increased. Fresnel lens has been crafted to be translucent so that it can capture only infrared radiation without getting unwanted radiations from visible spectrum of light.”

Now the issue is that most glass and metals reflect IR wavelengths extremely well. So depending what the film/mirror backing is made out of may make your efforts mute. Aluminum which is used in most standard mirrors reflects all of the Infrared light in the spectrum.

So mounting it behind the mirror just doesn’t seem practical due to the way light works. So what I’m thinking of for me, is to mount it in a light fixture above the mirror. Not sure on the details yet but that’s where I am right now.
However the Camera trick does function very well and will give you that clean look.

This is the VGA output we’re playing with now, its a kit you solder yourself and uses the GPIO pins as the output.
https://www.pi-supply.com/product/gert-vga-666-hardware-vga-raspberry-pi/

I assume you’re using a dongle style hdmi to vga converter?

Seems chrome just doesn’t like it. Works fine (for the most part)in IE. Thanks :)

not sure what the NULL on every module is though, it doesn’t appear when directly plugged into the pi, only when viewing remotely.

edit: added screenshot

If you have the mirror installed and is running on a network, should I not be able to pull up IP:8080 to view it on a separate browser?

We’re putting a lot of useful information in the MM and i can see a use to be able to bring it up on an ipad or on my computer in the basement from time to time. I’ve tried IP:8080 but the screen just comes up black while the services are running. If they aren’t running it just says “this site can’t be reached”. So its recognizing there is something there at least…

Any ideas? Or can someone please explain why this wont work? Thanks,