Review on π Stemedu 5PCS RCWL-0516 Motion Detection Sensor: Advanced Microwave Radar Module for Arduino ESP8266 Nodemcu Wemos - Ideal for Animal Detection, Long Range 5-7m, Outperforms HC-SR501 by Jerry Chembola
They're sensitive
If you've tried using PIR modules (like a bug's eye) with ESP-based microcontrollers, you'll find that you get a lot of false positive readings. This is because the shield does not prevent the Wi-Fi signal from triggering the PIR. These modules fix it. The only warning I have for you is this: you are sensitive. When I plugged it in for the first time, it continued to work. I held it in my hand. When I put it on the table everything was fine. If you're looking for sensitive thermal sensors, grab a pack of these.
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