If your receiver is a generic or unbranded unit (e.g., a USB magnetic compass module from eBay), the manufacturer may not offer software. In that case, turn to trusted open-source or freemium utilities that the navigation community ranks as “top.” These include:

| Utility Name | Platform | Best For | |--------------|----------|-----------| | OpenCPN (with compass plugin) | Win/Mac/Linux | Marine navigation | | QGIS (geomagnetic tools) | Cross-platform | GIS professionals | | EasyCompassPro | Windows | Hobbyist USB compasses | | SensorLogger | Android/iOS | Mobile magnetic field mapping |

View raw data streams from your receiver in real time. Perfect for debugging why your autopilot isn’t getting depth or heading data.

Upload new firmware files (.bin or .hex) directly to the receiver’s flash memory. This fixes bugs and adds satellite system support (Galileo, BeiDou).

| Feature | Description | |---------|-------------| | Constellation Support | BeiDou (B1I, B2a, B3), GPS L1/L2, GLONASS, Galileo | | Connection Methods | Serial (COM port), USB, TCP/IP, Bluetooth, Virtual COM | | NMEA View | Parses and displays GGA, RMC, GSV, GSA, ZDA, etc. | | Raw Data Logging | Saves raw RINEX, BINEX, or UBX data | | Skyplot & Signal Strength | Graphical satellite position and signal bars | | Position Tracking | Real-time map display (lat/lon+altitude) | | Firmware Upgrade | Some versions allow receiver firmware updates | | Almanac/Ephemeris | View or inject orbital data |

Once you have the legitimate file, installation is straightforward:

Select which GNSS constellations to use – GPS, GLONASS, BeiDou, Galileo. Disable weak ones to improve position accuracy.