SparkFun Triband GNSS RTK Breakout - UM980

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 is able to 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. With this board, you will be able to know where your (or any object's) X, Y, and Z location is within roughly the width of your fingernail. When an RTK solution is reached, the module can achieve a horizontal accuracy of about 8mm (~0.3 inches) and vertical accuracy of 15mm (~0.59 inches). The UM980 is capable of both rover and base station operations.

We've included a rechargeable backup battery to keep the latest module configuration and satellite data available. This battery helps 'warm-start' the module, decreasing the time-to-first-fix dramatically. This module features a survey-in mode, allowing the module to become a base station and produce RTCM 3.x correction data. A SMA connector is included for a secure connection to a Triband GNSS antenna.

Currently, serial UART is only supported on the UM980 module. All three serial UART ports have been broken out to the USB-C connector via CH340, 4-pin locking JST connector, and BlueSMiRF header. Unique pins have also been broken out to the edge of the board. Various jumpers are also included to configure power and LEDs.

  • Module has a 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 (w/ specific firmware) protocols over UART
  • Integrated SMA connector for use with multiband GNSS antenna of your choice
  • Voltage: 5V or 3.3V but all logic is 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: Reak-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: 2.0in. x 2.0in. (50.8mm x 50.8mm)
  • Weight: 13.8g

*: Items marked with * are only supported by specific firmware.

SparkFun Triband GNSS RTK Breakout - UM980 Product Help and Resources

Core Skill: Programming

If a board needs code or communicates somehow, you're going to need to know how to program or interface with it. The programming skill is all about communication and code.

4 Programming

Skill Level: Experienced - You will require a firm understanding of programming, the programming toolchain, and may have to make decisions on programming software or language. You may need to decipher a proprietary or specialized communication protocol. A logic analyzer might be necessary.
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Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

2 Electrical Prototyping

Skill Level: Rookie - You may be required to know a bit more about the component, such as orientation, or how to hook it up, in addition to power requirements. You will need to understand polarized components.
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