Human presence sensors....
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https://esphome.io/components/sensor/ld2420.html I believe the radar model they use is in that artical. It's pretty simple to use. If you preset the zones you get a trigger and read the zone. Not sure if an atmel is fast enough to keep up with the readings of the sensor. But they aren't expensive, they are actual very affordable and fun to play with
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I use similar LD2410 with atmel for 4 years now without any problems. Just configure boudrate little bit lower (via PC connection) then use interrupt pin as triger and uart only for changes in config.
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I use similar LD2410 with atmel for 4 years now without any problems. Just configure boudrate little bit lower (via PC connection) then use interrupt pin as triger and uart only for changes in config.
@CodeGarage does it give many false positive or false negatives? I want to mount one under the porch at the frontside. Also did you post this project somewhere?
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@CodeGarage does it give many false positive or false negatives? I want to mount one under the porch at the frontside. Also did you post this project somewhere?
@TheoL I have cat and no false at all. But it is not simple to proper design of radon for this kind of sensors. I not posted it anywhere, but from firmware side it is straight forward - I use this one https://github.com/ncmreynolds/ld2410 + simple sketch for mysensors.
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@TheoL I have cat and no false at all. But it is not simple to proper design of radon for this kind of sensors. I not posted it anywhere, but from firmware side it is straight forward - I use this one https://github.com/ncmreynolds/ld2410 + simple sketch for mysensors.
@CodeGarage Bot sure what you mean with a proper design of Radon and Google translator didn't help much. I have a big renovation ahead. But after that I should have a 32 square meter hobby space. That one is the first project I'll be doing over there
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@CodeGarage Bot sure what you mean with a proper design of Radon and Google translator didn't help much. I have a big renovation ahead. But after that I should have a 32 square meter hobby space. That one is the first project I'll be doing over there
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@TheoL "A radome (a portmanteau of "radar" and "dome") is a structural, weatherproof enclosure that protects a radar antenna."
In other words, it is special designed enclosure. If you want 100% predictable results, it must be good design.@CodeGarage I guess I have a lot of research ahead )
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@CodeGarage I guess I have a lot of research ahead )
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@TheoL It's not that hard ;) For me, most challenging part of design was to determine material properties (I was using 3d printing technology).
@CodeGarage What I want is a lion powered Sensor if possible. And that in a case I can stick to the door frame. As I cannot screw or drill into the doorframe. But I have no idea how much current that draws.
