Amsterdam-based software engineer Arkaitz Garro has taken a Raspberry Pi Zero and a camera module and fixed it, using what looks like a Pi Hut Zero View, to a window. The window is located near to his back door. When the camera recognises his cat (and no-one else’s), it sends him a message via Slack to open the door to admit his cat, Bobit, to the house. The Pi uses MotionEyeOS to detect movement and then sends the image to Amazon Web Services’ Rekognition AI software to identify the specific cat. I do wonder how many times a day the cat just sits there, getting recognised and then fails to come in when the door is opened, just to get attention!