NavCore-UM982

NavCore-UM982

Aug 12, 2026

👉NavCore-UM982-V2

👉Provided Resources

1. Restore Default Settings

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After installing the UPrecise software, connect the device via serial port. Please ensure the New Line option is enabled in the serial settings.

freset // Clear saved receiver settings, satellite ephemeris, position data, etc. Baud rate resets to 115200 bps
CONFIG COMX 115200 // Configure baud rate for COMX (X is the serial port number shown on your PC, CH341 driver required)
UNMASK GPS // Enable GPS
UNMASK BDS // Enable BeiDou
UNMASK GLO // Enable GLONASS
UNMASK GAL // Enable Galileo
UNMASK QZSS // Enable QZSS
GPRMC COM1 1 // Output GNGGA data at 1Hz
GPGSV COM1 1 // Output multi-system $GSV data at 1Hz
SAVECONFIG // Save configuration to receiver

2. Firmware Upgrade

In the UPrecise left navigation panel, click Receiver Upgrade to enter the firmware upgrade interface. Load the firmware file UM982_R4.10Build23575, then click Soft reset and Start sequentially. The upgrade process will proceed automatically.

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3. Common Commands

Command Description Parameters / Notes
freset Factory reset
Clear all saved settings, ephemeris, and position data. Baud rate resets to 115200 bps 		No parameters
version Query firmware version
Display the current receiver firmware version		 No parameters
config Query serial port status
Display current baud rate and settings for all serial ports (COM1/2/3)		 No parameters
mask [system] Disable satellite system
Disable the specified GNSS system		 [system]: BDS, GPS, GLO, GAL
Example: mask BDS
unmask [system] Enable satellite system
Enable the specified GNSS system (receiver tracks all systems by default)		 [system]: BDS, GPS, GLO, GAL
Example: unmask BDS
config com[X] [baud] Set serial port baud rate
Configure the communication rate for a specified serial port		 [X]: Port number (1/2/3)
[baud] supports: 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
Example: config com1 115200
unlog Stop data output
Immediately stop all NMEA data output on the current serial port		 No parameters
saveconfig Save configuration
Write all current settings to non-volatile memory (persists after power cycle)		 No parameters
mode base Set to base station mode
Switch receiver to base station operation mode		 No parameters
mode rover Set to rover mode
Switch receiver to rover operation mode (factory default mode)		 No parameters
gpgga com[X] [rate] Output GGA data
Output GGA messages on the specified serial port at the set rate		 [X]: Port number
[rate]: e.g., 1 for 1Hz
Example: gpgga com1 1
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