The i2c_pocket_scanner is a handy little testing tool built on an RP2040 chip (using a Seeeduino Xiao board) that helps you instantly find and troubleshoot electronics on your desk without needing a complicated keyboard setup. Running on QMK firmware, it constantly scans the physical wires (SDA and SCL pins) to look for connected gadgets like OLED screens, dials, or sensors. Because computers can be slow to recognize a USB device when it first plugs in, the code is smart: it uses an automatic 5-second timer to loop the test over and over again so you never miss the data. Best of all, it acts as a dual-screen monitor, sending the full diagnostic list right to your computer’s QMK Toolbox console while simultaneously updating a clean summary on your physical 0.91” desktop OLED screen.