| Problem | Likely Cause | Solution | |---------|--------------|----------| | “Port open failed” | Port already in use by another app (e.g., Arduino IDE, CuteCom) | Close other serial monitors. | | Garbage characters on screen | Baud rate mismatch | Ensure both devices use same baud, data bits, parity. | | No data received, but TX works | RX pin not connected, or flow control enabled | Check wiring; disable hardware flow control. | | SSCOM freezes after long run | Buffer overrun (rare) | Enable “Auto-save to file” and clear display periodically. | | Cannot find COM port | Driver not installed (e.g., CH340, CP2102, FTDI) | Install appropriate USB-UART driver. |
are correctly installed. Often, a simple driver update is the difference between a "Port Not Found" error and a successful connection. sscom 5131 english portable