Troubleshooting¶

USB-to-UART Driver / COM Ports¶

Missing COM Ports: Verify the physical connection at the USB-to-UART bridge port and reseat the USB cable.
Fewer Than 4 COM Ports in Device Manager: Windows may not have automatically assigned drivers to all bridge channels. Open Device Manager and manually run driver installation for each unidentified device individually (see Section 3.1).

WebUI Page Fails to Load http://192.168.7.1: Confirm the cable is connected to the native USB interface port (USB_M) and EVB is power on.
Network Adapter Not Recognized: If the NCM network adapter does not appear in Windows Network Connections, try a different USB cable or motherboard port, then reconnect

Upload Stalls or Fails: Do not close or refresh the browser tab immediately. Wait a few moments, reload the WebUI page, and retry the update.
Board Unresponsive After Upgrade: Wait at least 30 seconds before power-cycling or assuming a flash failure; the Flash Bootloader (FBL) process requires this time to finalize firmware writing and reboot.
No Satellites in Skyplot Post-Upgrade: Verify that the GNSS antenna is securely connected and powered (see Section 2.2.2) before troubleshooting firmware integrity.

No Incoming Data Stream (0 Bytes Received): Verify the SERVER IP/domain, PORT, MOUNTPOINT, and login credentials in the NTRIP Client settings.
Incoming Bytes Active but No RTK Correction Output:
Confirm the target COM port and baud rate are correctly selected under RTCM OUTPUT PORTS.
Ensure no other application (e.g., terminal, another H-center window, or legacy tool) is locking the selected COM port
Position Solution Stays at Single (1), DGPS (2) or Float (5):
Confirm that GGA SOURCE transmission is enabled so the caster can identify your location and stream appropriate base station corrections.
Ensure clear sky view and allow sufficient convergence time for an RTK FIXED solution.