I've had good luck using AI to reverse-engineer Bluetooth comms for "smart" products with shitty apps.

I've recently done the same for a Bluetooth LED matrix display, then took it a step further assembling my own hardware (ESP32 controller and RGBIC matrix) to have control over the firmware for features that weren't possible with the off-the-shelf device.

None of this would have been possible (or at least practical from a time-value perspective) for me to do without Claude driving the whole exercise.