mmWave human presence for under $20?!

[phillip1 (Phillip)]

DFRobot Sen0395. But it’s not in stock.
Fall Module pro is untested but the spec sheet makes it look promising.

I had a few thoughts on some:

@phillip1

• DFRobot SEN0395 ($29)
• RFBeam K-LD7 ($86)
• RFBeam K-LD2 ($53)
• SeeedStudio 24GHz Human Stationary Presence Module ($20)
  (similar to the 24GHz Fall Detection Module)
• SeeedStudio 60GHz Fall Detection Pro ($37)
• SeeedStudio 60GHz Respiratory Heartbeat Sensor ($45)
• Jorjin MM5D91-00