Open the Windows search bar, type , and press Enter. Navigate to the Hardware tab. Click the Device Installation Settings button.
: The device relies on a Prolific PL-2303 USB-to-Serial chipset.
Windows 11 blocked the driver due to a missing signature or chip counterfeit detection.
: Use the GlobalSat GPS Info Tool to verify the device is receiving satellite signals once the driver is active.
Do not use the standard Windows Update driver. Follow these steps to get the working version:
Before downloading files, it is crucial to understand what is happening under the hood of your BU-353S4.
This happens if your mapping software is set to the wrong Baud Rate. Ensure your software configuration is strictly locked to 4800 Baud .