mmWave Presence Detection - ESPHome style

@crlogic cool project… Love it.

Just FYI for those looking for RCWL-0516 replacement. I am also looking for RCWL-0516 replacement. Here is what I end up with. It consume about 70uA.

Here is my 2 months experience with it. Surprising, it is good. It can penetrate barrier like glass. But, it is not much. I am doing Arrival sensor and use this sensor. My goal is to detect whether someone enter my car. I could use 4 reed contact sensor and wire it. This module give me very close to what 4 contact sensors would be functioning. I have a video there when I approach my car. The sensor does not really detect me until I am about 1 to 2 inch from the car.

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