"Automated Computer Security: Presence Sensor Locks Your Device When You're Not Around"
Originally Published 2 years ago — by Hackaday
A presence sensor based on a 24 GHz radar module and an ESP32 microcontroller has been developed to automatically lock a computer screen when the user walks away from the machine. The sensor detects motion and sends the screen lock keyboard shortcut to the computer, ensuring security in offices with high foot traffic. The project can be implemented using various microcontroller platforms, and the addition of a blinking LED would provide a visual indication before the screen locks.