The SparkFun Triband GNSS RTK Breakout features the UM980 GNSS high precision RTK position module from Unicore Communications. The UM980 is a 1408-channel GNSS receiver based on the Nebulas IV™ that can simultaneously track GPS L1/L2/L5, GLONASS L1/L2, Galileo E1/E5a/E5b/E6, Beidou B1I/B2I/B3I/B1C/B2a/B2b, QZSS L1/L2/L5, and SBAS. This board allows you to pinpoint the X, Y, and Z location of any object within roughly the width of your fingernail. With an RTK solution, the module achieves a horizontal accuracy of about 8mm and vertical accuracy of 15mm. The UM980 supports both rover and base station operations.Equipped with a rechargeable backup battery, the module retains the latest configuration and satellite data, enabling a 'warm-start' that significantly reduces the time-to-first-fix. The module's survey-in mode allows it to function as a base station, producing RTCM 3.x correction data. A secure SMA connector is provided for attaching a Triband GNSS antenna.The UM980 module currently supports serial UART only. All three serial UART ports are accessible via a USB-C connector through CH340, a 4-pin locking JST connector, and a BlueSMiRF header. Unique pins are also available on the board's edge, with various jumpers included for configuring power and LEDs.Features: * Typical low power-consumption of ~480mW * 1408-channel GNSS receiver based on the Nebulas IV™ * Concurrent reception of GPS, GLONASS, Galileo, BeiDou, QZSS * GPS: L1C/A, L1C, L2P(Y), L2C, L5 * GLONASS: L1, L2 * Galileo: E1, E5a, E5b, E6 * Beidou: B1I, B2I, B3I, B1C, B2a, B2b * QZSS: L1, L2, L5 * SBAS * Horizontal Accuracy * Autonomous: 1.5m * DGPS: 0.4m * RTK: 0.8cm + 1ppm * Vertical Accuracy * Autonomous: 2.5m * DGPS: 0.8m * RTK: 1.5cm + 1ppm * 50Hz Data Update Rate * Time-To-First-Fix: * Cold: 30s * Warm: 20s * Hot: 5s * CoCom Limits * Max Altitude: 18000m * Max G: <5G * Max Velocity: 515m/s * Velocity Accuracy (RMS): 0.03m/s * Time Accuracy (RMS): 20ns * Supports NMEA, RTCM, and Unicore (with specific firmware) protocols over UART * Integrated SMA connector for use with a multiband GNSS antenna of your choice * Voltage: 5V or 3.3V, with all logic at 3.3V * USB Type C Connector * ESD Protection Diodes for USB Data Lines * Built-in Resettable PTC Fuse 6V/1.5A * CH340 USB-to-serial converter on UART1 Port * Locking JST Connector for UART2 Port * BlueSMiRF Footprint for UART3 Port * Backup Battery for Hot Start * LEDs * PWR: Power Indicator * PVT: Position, Voltage, Time * PPS: Pulse-Per-Second Indicator * RTK: Real-Time-Kinematic Fixed Solution Indicator * Jumpers * SHLD: USB Shield * VSEL: Voltage Select for Locking JST Connector Port * PWR: Power LED * PVT: Position, Voltage, Time LED * PPS: Pulse-Per-Second LED * RTK: Real-Time Kinematic LED * BT-VCC: Voltage Select for Bluetooth Port * VANT: Voltage Antenna Select * Dimensions: 50.8mm x 50.8mm * Weight: 13.8g *: Items marked with * are only supported by specific firmware.Documents: * Schematic * KiCad Files * Board Dimensions * Hookup Guide * Unicore Communications UM980 * General Specifications * Datasheet * User Manual * Reference Commands Manual * UPrecise Software * UPrecise User Manual * CH340 Drivers * SparkFun RTK * Arduino Library * GitHub Hardware Repo Videos https://elecena.pl/product/27751449/sparkfun-triband-gnss-rtk-breakout-um980 2025-01-24 https://elecena.pl/product/27751449/sparkfun-triband-gnss-rtk-breakout-um980 2025-09-28 https://elecena.pl/product/27751449/sparkfun-triband-gnss-rtk-breakout-um980 2025-09-29 https://elecena.pl/product/27751449/sparkfun-triband-gnss-rtk-breakout-um980 2025-10-02 https://elecena.pl/product/27751449/sparkfun-triband-gnss-rtk-breakout-um980 2025-10-05 https://elecena.pl/product/27751449/sparkfun-triband-gnss-rtk-breakout-um980 2025-10-06 https://elecena.pl/product/27751449/sparkfun-triband-gnss-rtk-breakout-um980 2025-10-07 https://elecena.pl/product/27751449/sparkfun-triband-gnss-rtk-breakout-um980 2025-10-09 https://elecena.pl/product/27751449/sparkfun-triband-gnss-rtk-breakout-um980 2025-10-10 https://elecena.pl/product/27751449/sparkfun-triband-gnss-rtk-breakout-um980 2025-10-12 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