doorpi v3 shipped in April 2026. It is the third revision of a face-recognition + peace-sign door unlock that runs continuously on a small box behind a fixture in my apartment lobby. Pi Zero W on the capture side, ESP32 on the strike-plate side, the latch in the middle.
The peace sign is the part I am most proud of. It is the one-bit confirmation that the unlock was on purpose — the door does not open because my face happened to appear in the frame, only because I deliberately said it should.