Read the statement by Michael Teeuw here.
PIR sensor behind glass?
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That is awesome!!! Great job and Thank you for the info!!!
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I got the microwave radar modules today!
They work great, even behind my mirror, although they are very sensitive. It triggered on even small arm movements and didn’t require line of sight. Works for my needs though, I just want it to turn off the monitor when nobody is around.
I haven’t tried powering them with my PI, but they worked fine with an external 5v power supply.
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That’s another great way to do it! :) Where did you get them from?
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@dmcinnes It’s great to hear that they’re working on an external 5v power supply, this means it should be possible to use them on the Pi. It would be really nice if you could try hooking them up to the Pi to see if they’re acting up once attached to the Pi’s pins. I’ll probably try to get one as well if you can confirm they’re working on the Pi as well.
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@cowboysdude: You’re welcome :)
Also, have a look at this post:
dmcinnes said in PIR sensor behind glass?:
Another possibility: I ordered a couple of these $2 microwave radar motion detectors to see if they will work behind my glass. Still waiting to receive them though:
More details:
http://www.cnx-software.com/2016/04/04/tiny-microwave-radar-module-detects-movements-up-to-9-meters-away-for-2/amp/ -
Finally got around to testing on the PI’s 5v power (I’ve busy being sick) and seems to work fine!
Next I’m going to hook up to the GPIO and see if I can get the whole thing running together. -
Now that I have time I’ve finally set up the microwave sensor on my mirror. Works like a charm!
The sensor’s data line goes high to 3.3v when it detects motion and stays high for about 30 seconds. It’s set up on one of the 5v outputs. I’ve put some foil around it to help it be a bit more directional since the sensor is so sensitive; I sit under and to the right of my mirror all week and I don’t want it it trigger all the time. It helps somewhat. -
I used some cardboard and then made a little housing for my PIR under the bottom of the mirror. It is a little ugly, but hey this whole project for me was to make something cool (not necessarily beautiful)!
I did a few layers of cardboard between the sensor and the front to limit the viewing angles and for my needs it is perfect :)
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@dmcinnes Would you mind share some code? :)
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@Cato just the regular PIR sensor mirror code works fine! The data pin triggers in the same way as a PIR sensor.
