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21 Sep 2020 10:10:29 UTC
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HA Thermal image
This was a "failed" experiment project to use an AMG8833 sensor, ESP32, MQTT and Node-Red to use as a presence detector in the door. Since PIR sensors can only tell movement, I wanted to experiment if a low definition (AGM8833 is a 8x8 pixel thermal sensor) thermal image sensor can be used to tell if somebody is the room, stays in various parts of the room etc. It is a failed project, because normal body temperature pretty much fades into background noise after about 2 meters. It can certainly tell presence in closer distance, but it is not suitable for an entire room. The sensor is relatively expensive (cca. $50 on Banggood) so it is no viable to map a room with multiple sensors.
Chapters:
0:00 Intro
2:50 The electronics
4:39 The solution
12:09 Node-Red flow
20:02 Arduino sketch
22:36 Outro
Arduino sketch: https://github.com/nygma2004/amg8833_thermal_imager
Flow: https://flows.nodered.org/flow/3a7822f76f9a0d18c5486b92b65228f0
...
https://www.youtube.com/watch?v=o97A5IZ9Piw
Chapters:
0:00 Intro
2:50 The electronics
4:39 The solution
12:09 Node-Red flow
20:02 Arduino sketch
22:36 Outro
Arduino sketch: https://github.com/nygma2004/amg8833_thermal_imager
Flow: https://flows.nodered.org/flow/3a7822f76f9a0d18c5486b92b65228f0
...
https://www.youtube.com/watch?v=o97A5IZ9Piw
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