Read the statement by Michael Teeuw here.
UPDATE: Replaced my PIR-Sensor with a Doppler Microwave Sensor.
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@mickyvi in my case it was the opposite experience. I have 3mm thick glass and back of the glass is covered by matte black paper. The initially installed microwave sensor (behind glass and paper) was too sensitive and could pick up movement up to 4-5m distance. That was too much for me so I had to modify the sensor by adding a trimmer.
Once the trimmer was added I could dial in the sensitivity as needed.
Here is my mirror… https://forum.magicmirror.builders/topic/13430/my-first-slim-mirror-at-homeIn your design, maybe cut a hole in the wood back cover to fit the sensor in. That way the sensor will only need to go through 6mm glass. You can cover the space of the hole with black paper to eliminate any light entry there.
It’s hard to recommend anything smarter without knowing the details of your design. Do you have any picture you could share so we can see how the back of the glass enclosure looks like? -
Hi Uros,
I also thought of making a window and putting the sensor in there in order to eliminate 3 mm of thickness and in fact I think it will be the first test I will do.
Unfortunately today I am at work and I will be able to carry out studies and modifications only tomorrow when I have the day off.
I have no photos of the rear, very simple cmq, a wooden frame covered in metal 100 x 40 cm, a 6 mm Mirastar mirror, a 3 mm plywood tablet painted in black on which the various electronic devices are placed.
Tomorrow I will take some photos inside the outside as well, at the moment it is like this:https://forum.magicmirror.builders/topic/9246/which-type-of-mirror-to-use/13?page=2
Thanks bye
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@mickyvi Ususally those sensors a quite sensitiv and detect motions even through walls. That was also my case, why I added the trimmer to reduce sensitivity. Maybe the sensor is from a bad lot. You could try anotherone if you have a spare. Those sensors are pretty cheap.
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Goodmorning everyone,
after several attempts I have resigned myself to the fact that the doppler sensor cannot pass the 6 mm of glass.
I also tried to buy a slightly more “expensive” sensor but the result is always the same.
https://www.amazon.it/gp/product/B089NKGWQQ/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
unfortunately the result is always the same: it detects well from behind but from the front there is no way to pass the signal.
Even trying to make a window in the plywood the result does not change (same result with “inexpensive” sensor and with “very expensive” sensor.
Very disappointed and dejected about this. :-(
I think I’ll try again with simple PIRs maybe with the 2mm hole tutorial. And let’s see what happens.
Hello everybody
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@mickyvi that is sad to hear. The glass you are using must have some special coating that prevents signal go through.
Did you try to rotate the sensor? I know these sensors are sensing around 360degree but I think the actual antenna is stronger on one side.
Also, what’s the distance from mirrir you are trying to get the sensor to pick up movement? Does it work fine when using without glass?For me PIR was not an option. I tried cheap and expensive PIR sensors and all of them had too many false positives. Plus it needs to be ouside visible.
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Hello,
Yes, in my opinion it’s the mirror, damn it, if you only knew how much I paid for it …
Yes, I tried in every way, even putting the sensor behind the monitor (… when you are desperate you try everything …: -) …), turning it, putting it sideways but nothing, it does not detect.
If I move it outside, it detects everything, but even with the “cheap” sensors I had noticed the same functionality.I don’t know, maybe I will also give up motion detection: maybe a button that takes it out of stand by and then stays on for 20 minutes … I know … it’s shit … but I don’t want to continue to have the mirror resting on the floor without being able to install it and continue testing.
I have to think about it for a while.
Hello and thanks for the support everyone! -
@mickyvi as the last option maybe install the sensor on top or bottom of the mirror frame. Hide it in a small enclosure (wooden or hard paper or 3D printed extension to the frame) and paint the same color as the frame. If done nicely it won’t even look that bad. And it will for sure work :)
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@mickyvi That’s indeed really strange, and I can only guess that the mirror has a reflecting coating which prevents the signal from passing through the mirror. The thickness of the glass itself is not the limiting factor, as the signal usually passes even stone walls and can detect motion in adjacent rooms. I operated my sensor first behind the mirror, too, and it worked. It is a 4mm Pilkington. Later I moved it under the frame, because it was easier to trim the sensor and hid it behind a 3D-printed cover. Thus, I’d second @uros76 proposal to mount the sensor on top or on the bottom of the frame where it is not visible. Don’t give up!
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Hello everybody,
I’m taking the path of the classic infrared PIR sensor.
I made two shells that can be attached under the two arms of the lamps above the mirrors.
Here still in the assembly / painting phase:
I’m gonna give a nice coat of chrome today and we should be there. :-)
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@mickyvi That’s a totally awsome solution! Really cool!
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@fozi
Thanks, the compliments from such experienced people are always very welcome !! -
D dkhorse74 referenced this topic on
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Thank you for this awesome solution! I just got mine up and running with MMM-PIR-Sensor. I was wondering if any of you have got this microwave sensor to also work with MMM-NearCompliments? I was thinking since it was also inspired by PIR sensor, I could get it to work, but no luck yet.
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hello,
i tried this with the microwave sensor, but im out of ideas. i get wrong positives every minute. (i check every 5 sec).
i added also the ferrite, tried another raspberry, different of these sensors (bought a 5 pack) and placed it in a different room. anyone got any ideas what else i could try?
or maybe similar microwave sensors i could try?any help would be great, tyvm
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@Lipax said in UPDATE: Replaced my PIR-Sensor with a Doppler Microwave Sensor.:
hello,
i tried this with the microwave sensor, but im out of ideas. i get wrong positives every minute. (i check every 5 sec).
i added also the ferrite, tried another raspberry, different of these sensors (bought a 5 pack) and placed it in a different room. anyone got any ideas what else i could try?
or maybe similar microwave sensors i could try?any help would be great, tyvm
Did you try and limit the range as described in beginning of this thread? For me option 2 helped to limit oversensitivity.
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@uros76
the range is not the problem. i get positives when nothing is moving near it -
@Lipax this sensor is very sensitive and catches any movement 360 around from several meters away. I had same problem… If you don’t dial down the sensitivity-range you will keep getting false positives.
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@Lipax try dialing down the sensitivity, it’s probably picking up dust or something small you can’t see.
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thanks for the help, but i doubt its some kind of movement since its exactly every minute. i tried a different room and its the same.
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@Lipax please don’t submit duplicate posts…
all users with reputation below 2 have their posts reviewed… this eliminates all the porn, advertising and trash posts from the forum.
it just takes time for (me) to get to review the posts…
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Can you share your python code? Perhaps there’s something there
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