SparkFun GPS Dead Reckoning Breakout - NEO-M8U (Qwiic)

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GPS Dead Reckoning Breakout - NEO-M8U (Qwiic)

SparkFun GPS-16329

The SparkFun NEO-M8U GPS Breakout is a highly configurable GPS board made to exceptional standards. The NEO-M8U takes full advantage of Untethered Dead Reckoning (UDR) technology by u-Blox. Providing constant navigational data without the need to electrically connect to a vehicle, the NEO-M8U reduces installation cost for after-market dead reckoning applications.
The NEO-M8U module is a 72-channel u-Blox M8 engine GNSS receiver, this means it has the capability to receive signals from the GPS, GLONASS, Galileo, and BeiDou constellations within a ~ 2.5 meter accuracy. Supporting the simultaneous reception of all three GNSS systems, combined with integrated 3D sensor measurements on the NEO-M8U, you will receive accurate, real-time global positioning rates of up to 30Hz.
This breakout board maximizes positional accuracy in densely populated or covered areas. Even with sub-par signal conditions, constant positioning is provided in urban environments and is still available during complete signal loss (e.g short tunnels and multi-story parking) . Using UDR technology, positioning begins as soon as power hits the board, and before the initial GNSS fix. Lock time is reduced by way of the on-board rechargeable battery, the secondary power source will enable the GPS to get a lock-on within seconds!
Furthermore, the receiver supports I2C which means it is perfectly compatible with the qwiic system. Therefore no soldering is required to connect it to the rest of your qwiic system. However, there's still broken out 0.1"-spaced pins in case you prefer to use a breadboard.
U-Blox based GPS products are configurable using the popular, but dense, windows program called u-center. Plenty of different functions can be configured on the NEO-M8U: baud rates, update rates, geofencing, spoofing detection, external interrupts, SBAS/D-GPS, etc. All of this can be done within the SparkFun Arduino Library!
The SparkFun NEO-M8U GPS Breakout is also equipped with an on-board rechargeable battery that provides power to the RTC on the NEO-M8U. This reduces the time-to-first fix from a cold start (~26s) to a hot start (~1.5s). The battery will maintain RTC and GNSS orbit data without being connected to power for plenty of time.

Video Introduction:


  • Integrated U.FL connector for use with the antenna of your choice
  • 72-Channel GNSS Receiver
  • 2.5m Horizontal Accuracy
  • 30Hz Max Update Rate
  • Time-To-First-Fix:
    • Cold: 26s
    • Hot: 1.5s
  • Max Altitude: 50,000m
  • Max G: ≤4
  • Max Velocity: 500m/s
  • Velocity Accuracy: 0.5m/s
  • Heading Accuracy: 1 degree
  • Built-In Accelerometer and Gyroscope
  • Time Pulse Accuracy: 30ns
  • 3.3V VCC and I/O
    • Current Consumption: ~29mA Continuous Tracking, Default Concurrent Mode
  • Software Configurable
    • Geofencing
    • Odometer
    • Spoofing Detection
    • External Interrupt
    • Pin Control
    • Low Power Mode
    • Many others!
  • Supports NMEA, UBX, and RTCM protocols over UART or I2C interfaces



  • This product requires an antenna, which is not provided as part of the product. Be sure to check out the antennas we have on the store before hitting the checkout!
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