Raspberry Pi Pinout

Uputronics GPS Expansion Board

Adds location and PPS to enable precision time keeping to your Raspberry Pi.


  • 166 dBm sensitivity, 18Hz update rate, 72 channel
  • Supports up to 3 concurrent GNSS sources GPS (American) GALILEO (European) Glonass (Russian) QZSS (Japan) and BeiDou (China)
  • PPS Output on fix (programmable 0.25Hz -> 10MHz)
  • LED indicator on PPS
  • Altitude limit 50km in flight mode
  • Robust SMA connector for external antenna
  • Current draw 6mA in cyclic mode up to 18mA in acquire.

I2C is connected but uses clock stretching.

Command reference guide: U-Blox M8 Receiver Description


Uputronics GPS Expansion Board