ESP32 microcontrollers come in all shapes and sizes, varying in capabilities and features from model to model. The ESP32-S3 is on the higher end of the spectrum when it comes to performance and capabilities, and I recently picked one up for playing with and testing. Thanks to its USB On The Go (OTG) support, I turned it into a computer mouse, and it’s both amazing that it works and the most impractical way that I think I’ve ever used a computer.