i have hopefully the final revision in house within 3 weeks (waiting on jlcpcb order)
Finale
Micro SNOS is also in the works prototype will be tested in a few weeks
is there any requests for next revision or even a esp32 version ? like nfc, more leds, display, âŚ
This will be published with instructions once the design is finalized
Upgraded room presence detection, not much a fan of bluetooth (which is tracking the phone, not the person), but something like the amg8833 - been playing around with it myself and it works really well so far
I donât wanna steal the thread, but I did not do muchâŚ
Iâve seen some work on scaling up the 8x8 frame to an 64x64 frame and running blob detection on it, which is okay if you want to know how many people are in there, but it was rather flaky for >2 and I only cared IF the room was occupied. Also I did not really understand the âgain on informationâ just by scaling up the pixels?
Anyhow, I am calibrating the sensor at the start (and whenever there is no presence for 2h to avoid temperature drifts) to get temperatures for each pixel with no person in it and substract the calibration from the readings, thus I only get the difference in pixel readings. Then I look for the maximum value being higher than threshold and send a MQTT message with âonâ. If the maximum value is lower for x times than a threshold, I send a MQTT message with âoffâ.
I am surprised how well this worked, however, if you are long in a room, it takes a while (3-5min) for the temperature to get below the point (e-function). Kind of like how you can see the foot steps for a while on the floor when you walk barefoot and film it with a thermal camera, but if you are just passing by, it was neat to see a short âonâ followed by a âoffâ again
If you want to know anything else you can shoot me a PM
Have you considered using a Wemos D1 mini instead of a NodeMCU? Itâs the same chip - esp8266 - but a smaller footprint. I use them on some âBruh-alikeâ sensors I built. The whole thing fits into a 70 X 45 X 30mm project box - 2.75" x 1.75" x 1.2" for us metric-challenged souls.
And thereâs an only slightly larger knock-off D1 mini ESP32 if you want or need extra horsepower.
This is cool! Iâll definitely check this out when I get off mobile. Were there any other projects like this? The bruh sensor was a good idea but never really worked as is in actual production. It required a lot of extra tweaking.
I have been using a Trigboard for some of my sensor stuff. Does not have a lot of I/O broken out but does have LIPO charging, deep sleep and wake on trigger built in. And it is tiny. My temp/ PIR sensor runs for about 3-4 months on one charge of a 500mAh cell, waking about every 1/2 hr to report in. I also use them for door sensors and light level. All reporting back to MQTT.
Everything will be finalized when the pcb`s come in to get some last minute changes and verify that everything is good!
Il keep this topic and github updated!
I am still waiting on the latest revision pcbâs and parts to make last adjustments to the enclosure and verify. Itâs a bad time for China shipments. I do this as fast as possible!
I keep you all updated!