doorpi v3 shipped in April 2026. It is the third version of a door unlock that runs on face recognition and a peace sign, and it runs around the clock. A Pi Zero 2 W with a webcam streams video to a PC, which does the face matching and looks for the peace sign. When both check out, the PC tells an ESP32 to push a small servo against the door-release button. The Pi never talks to the door; the PC does, so I can still unlock remotely if the camera is down.
The peace sign is the part I'm most proud of. It confirms the unlock was on purpose: the door doesn't open because my face happened to be in frame, only because I asked.