I like this Microwave sensor. Although large compared with some units, this will work with ESP8266/ESP32/Tasmota/Home-Assistant straight out of the box. Although the data sheet specifies 5V operation, I found that the units gave false triggering and they should be used with 3.3 supply. I had used similar mwave units which had switchable supply but these units do not have that facility - not that it is a problem! Compared with PIR sensors, I think these are far superior in use.
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