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Gravity: GNSS-RTK High Precision Positioning Kit

SKU: KIT0198-EU

DFRobot’s entry-level RTK positioning kit offers centimeter-level accuracy within 1.5KM in open areas. It uses Quectel’s LC29HDA rover and LC29HBS base modules, plus LoRa wireless transmission. Both are L1/L5 dual-frequency, supporting GPS, GLONASS, Galileo, BDS, QZSS. The kit has a pre-configured data link (no user setup), ideal for RTK learning, device tracking, trajectory mapping, and personnel positioning.

Overview of GNSS-RTK High Precision Positioning Kit

Downloadable Resources

  • Docs
  • Tech Specs

    • 1. Specification

    1.1 Base Station

    Parameter Details
    Power Supply Type-C
    Terminal: 5~10V
    GNSS Antenna Interface SMA
    Reception Bands GPS/QZSS: L1 C/A, L5
    GLONASS: L1
    Galileo: E1, E5a
    BDS: B1I, B2a
    Default Constellations GPS + GLONASS + Galileo + BDS + QZSS
    Concurrent Constellations 4 + QGNSS
    Function Base station
    Sensitivity Acquisition: -147 dBm
    Tracking: -165 dBm
    Reacquisition: -159 dBm
    Dynamic Performance Max Altitude: 10000 m
    Max Velocity: 500 m/s
    Max Acceleration: 4g
    Raw Data Update Rate 1 Hz
    Protocol NMEA 0183 / RTCM 3.x

    1.2 Mobile Station (RTK Mobile)

    Parameter Details
    Operating Voltage 3.3V~5V
    Output Signal I2C/UART
    Antenna Interface SMA
    Reception Bands GPS/QZSS: L1 C/A, L5
    GLONASS: L1
    Galileo: E1, E5a
    BDS: B1I, B2a
    Default Constellations GPS + GLONASS + Galileo + BDS + QZSS
    Concurrent Constellations 4 + QGNSS
    SBAS WAAS, EGNOS, MSAS, GAGAN
    Function RTK
    Horizontal Positioning Accuracy Autonomous: 1 m
    RTK: 5 cm + 1 ppm
    Velocity Accuracy 0.03 m/s
    1PPS Accuracy 20 ns
    RTK Convergence Time <10 s
    Sensitivity Acquisition: -145 dBm
    Tracking: -165 dBm
    Reacquisition: -157 dBm
    Dynamic Performance Max Altitude: 10000 m
    Max Velocity: 500 m/s
    Max Acceleration: 4g
    Navigation Update Rate(RTK) 1 Hz
    Raw Data Update Rate(GNSS) 1 Hz
    Protocol NMEA 0183 / RTCM 3.x
    LoRa Parameters RF Chip Semtech: LLCC68
    Operating Frequency: 868MHz
    Modulation: LoRa Spread Spectrum
    Max Transmit Power: 22dBm
    Receiver Sensitivity: -129dBm
    Weight 700g

    2. Appearance and Interface

    2.1 Mobile Station

    Mobile

    Name Description
    RTK RTK status LED: Blinks at 1Hz for state 5 (positioning); Steady for state 4; Off for other states.
    PWR Power indicator
    UART I2C Toggle switch for UART/I2C communication interface
    Gravity I2C&UART Gravity interface for data output

    2.2 Base Station

    Base Station

    Name Description
    Type-C Type-C power interface
    PWR Power indicator
    PWR IN External terminal power (5~10V)

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