Windows Update can sometimes "upgrade" your Prolific driver to a newer, incompatible version.
Look for . If it has a yellow exclamation mark, right-click it and select Update driver . Click Browse my computer for drivers .
If successful, you will see raw NMEA data sentences scrolling in the window. Take the device near a window or outdoors; within a few minutes, the grid will display connected satellites, and the hardware's red LED light will begin to flash, indicating a successful GPS fix. Troubleshooting Common Windows 11 GPS Issues G Star Iv Gps Driver Download Bu-353s4 Windows 11
if necessary, and select the specific Prolific version (e.g., version 3.3.2 or later) that mentions Windows 11 compatibility. Super User Important Troubleshooting COM Port Identification: Once installed, check Device Manager again to see which COM Port number
Note the assigned port number (e.g., ) to use in your navigation software. Device Features Chipset : SiRF Star IV high-performance GPS. Windows Update can sometimes "upgrade" your Prolific driver
This is a very common issue where the GPSInfo application displays random characters instead of standard $GPG... NMEA sentences.
Visit the official GlobalSat US website and navigate to their "Tech Support" or "Downloads" section. Look for the BU-353S4 product page. They provide a specific Windows 10/11 installation package designed to bypass the driver roll-back issues. Click Browse my computer for drivers
You should see "Prolific USB-to-Serial Comm Port (COMx)" listed.
Right-click the installer executable ( PL2303_Prolific_DriverInstaller.exe ) and select .
| Specification | Detail | | :--- | :--- | | | SiRF Star IV high-performance GPS chipset | | Frequency | L1, 1575.42MHz C/A Code | | Channels | 48 parallel channels tracking | | Sensitivity | Tracking: -163 dBm | | Position Accuracy | < 10 meters, 2D RMS (5 meters, 2D RMS with WAAS) | | Protocol | NMEA 0183 (GGA, GSA, GSV, RMC, VTG, GLL) | | Baud Rate | 4800 bps | | Power Consumption | 80mA | | Operating Temp. | -40°C to +85°C |
Click .