GPS Modules

Zubax GNSS - High Performance GPS/GLONASS Receiver + Compass + Barometer

Zubax GNSS is a high performance, EMI-resistant positioning module with doubly redundant UAVCAN bus interface. It includes a multi-constellation concurrent GPS/GLONASS receiver (u-blox M8), a 3-axis compass and a high precision barometric altimeter.

Available from:

Features:

  • High performance GPS/GLONASS receiver (u-blox M8) with advanced RF circuitry and high gain antenna
  • High precision digital barometer Measurement Specialties MS5611 (10 cm altitude resolution)
  • 3-axis digital compass Honeywell HMC5883L
  • Doubly redundant UAVCAN interface
  • Auxiliary serial port with direct access to the u-blox module
  • Continuous self diagnostics and failure detection
  • 3D-printable protective case
  • Low cost
  • Open source

Learn more:

UBLOX NEO-M8N GPS GNSS + Compass receiver board

Wiring (please see the image in the bottom left for labeled pins on the GPS):

GPS Connector (or any other UART connector)

  • Pixhawk GPS +5V (pin 1) - GPS +5V
  • Pixhawk GPS TX (pin 2) - GPS RX
  • Pixhawk GPS RX (pin 3) - GPS TX
  • Pixhawk GPS GND (pin 6) - GPS GND

I2C Connector (works also with the I2C splitter)

  • Pixhawk I2C SCL (pin 2) - GPS SCL
  • Pixhawk I2C SDA (pin 3) - GPS SDA

Available from:

3DR uBlox LEA-6H High-Performance Receiver

Features

  • Features and Specifications:
  • ublox LEA-6H module
  • 5 Hz update rate
  • 25 x 25 x 4 mm ceramic patch antenna
  • LNA and SAW filter
  • Rechargeable 3V lithium backup battery
  • Low noise 3.3V regulator
  • I2C EEPROM for configuration storage
  • Power and fix indicator LEDs
  • Protective case
  • ArduPilot Mega compatible 6-pin JST connector
  • Exposed RX, TX, 5V and GND pad
  • 38 x 38 x 8.5 mm total size, 16.8 grams.

Ashtech MB100 GNSS receiver

Features

  • 20Hz update rate
  • Two MMCX connectors for active antennas
  • Dual frequency
  • GPS/GLONASS/SBAS
  • RTK with RTK differential corrections
  • Power and satellites indicator LED
  • 58 x 63 x 10mm size
  • USB interface to debug/configure

This board has a 1.25mm pitch 2×12 pins male connector, which is not easy to use and also it operates on standard RS232 level unlike FMU/Pixhawk with 3.5/5V TTL level, so we developed an interface board with levels converter, power and connectors for RTK diff modem, Pixhawk GPS interface, etc. Also it can be connected to FMU 15pin connector so it's easier to use it with common ESC 3-pin connectors.

Interface board bottm Interface board top

This is how it looks with MB100 and FMU

MB100 with interface board and FMU

Trimble MB-One GNSS receiver

Features

  • 50Hz update rate
  • Two MMCX connectors for active antennas
  • Dual frequency
  • GPS/GLONASS/SBAS
  • RTK with RTK differential corrections
  • Power and satellites indicator LED
  • 71 mm x 46 mm x 11 mm size
  • USB, HTTP interface to debug/configure

This is the latest board from Ashtech (acquired by Trimble). It has a 2mm pitch 2×14 pins male connector, which is not easy to use, so we developed an interface board with LEDs, power and connectors for RTK diff modem, Pixhawk GPS interface, etc.

Interface board dimensions and mount holes are the same as Odroid U3.

The current Ashtech driver has a couple of issues with MB-One. We are currently working on rewriting it to binary protocol, but if you are planning to use MB-One now, please deactivate all ATM and RT3 messages on MB-One port connected to Pixhawk.

Interface board Interface board with ashtech and odroid Interface board with ashtech and odroid

Board in Eagle Layout Board schematics in Eagle Layout

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