Sscom 5131 English Upd [WORKING]

| Problem | Likely Cause | Solution | |---------|--------------|----------| | “Cannot open COM port” | Port occupied by another app (Arduino IDE, CuteCom) | Close other serial monitors. | | Garbled text | Baud rate mismatch or parity error | Verify device baud rate. Try 8N1 with same rate. | | No data received | Wrong COM port or driver failure | Reconnect USB, check Device Manager. | | Send button does nothing | Missing line ending (\r\n) | Append \r\n in “Send” options or manually. | | Interface freezes | Overwhelmed buffer | Reduce receive buffer size; check UPD fixes this. | | English reverts to Chinese | Wrong .exe downloaded | Re-acquire from genuine English UPD source. |