GPS uBlox MAX-M8Q GNSS HAT for Raspberry Pi

The MAX-M8Q GNSS HAT for Raspberry Pi offers you a versatile and precise GNSS solution that supports multiple constellations. It allows you to receive GPS, Beidou, Galileo, and GLONASS satellite systems simultaneously, increasing positioning accuracy and improving availability. Thanks to the support of additional systems like SBAS, QZSS, IMES, and D-GPS, the module is ideal for applications requiring high reliability and accuracy. With an outstanding sensitivity of -167 dBm and a strong ability to counter spoofing and interference, you can rely on accurate and stable position data.

Recommended Accessories:

• Raspberry Pi Board
• ML1220

Features:

• The module supports simultaneous reception of up to three GNSS satellite systems such as GPS, Beidou, Galileo, and GLONASS.
• It offers high positioning accuracy with a horizontal accuracy of 2.5 m CEP.
• Additional systems like SBAS, QZSS, IMES, and D-GPS enhance positioning performance.
• With A-GNSS support, the time to first fix is reduced, improving acquisition sensitivity.
• The module features a sensitivity of -167 dBm and strong resistance against spoofing and interference.
• The standard 40-PIN GPIO extension header allows easy connection with Raspberry Pi and Jetson Nano.
• An onboard USB-to-UART converter CP2102 enables serial debugging.
• The module supports NMEA 0183, UBX, and RTCM 2.3 protocols.

Application Examples:

• Fleet Management: Manage and track vehicles in real-time with high accuracy.
• Security Systems: Use the module for precise monitoring and locating of security devices.
• Industrial PDA: Increase accuracy and reliability in industrial applications.
• GIS Applications: Enhance geographic information systems with precise position data.
• Asset Tracking: Monitor and track valuable assets with high accuracy.

Board Overview:

1. MAX-M8Q Module
2. TXS0108EPWR Voltage Converter
3. RT9193-33 Power Chip
4. CP2102 USB-to-UART Converter
5. Status Indicators
   1. RXD/TXD: UART TX/RX Indicator
   2. PPS: GPS Status Indicator
   3. PWR: Power Indicator
6. Battery holder supports ML1220 rechargeable cell for storing ephemeris data and quick starts
7. Raspberry Pi GPIO Header for connecting to Raspberry Pi
8. UART, I2C interface for connecting to other microcontrollers
9. USB to UART connection
10. GNSS antenna connector
11. UART Selection Jumper
    1. A: Control MAX-M8Q via USB-to-UART
    2. B: Control MAX-M8Q via Raspberry Pi
    3. C: Access Raspberry Pi via USB-to-UART

Documentation:

• Waveshare Wiki

Technical Specifications:

• Manufacturer: Waveshare 
• Manufacturer SKU: 18233
• GNSS Specifications
• Supported Satellite Systems: GPS, GLONASS, BeiDou, Galileo
• Frequency Bands: GPS L1C/A, SBAS L1C/A, QZSS L1C/A, QZSS L1 SAIF, GLONASS L1OF, BeiDou B1I, Galileo E1B/C
• Horizontal Position Accuracy: 2.5m CEP (GPS), 4.0m CEP (GLONASS), 3.0m CEP (BeiDou)
• Maximum Navigation Update Rate: 10Hz (GPS), 18Hz (GLONASS, BeiDou, Galileo)
• Time to First Fix:
  • Cold Starts: 29s (GPS), 30s (GLONASS), 34s (BeiDou), 45s (Galileo)
  • Warm Starts: 1s (all)
  • Aided Starts: 2s (GPS, GLONASS), 3s (BeiDou), 7s (Galileo)
• Sensitivity:
  • Tracking and Navigation: -167 dBm (GPS), -166 dBm (GLONASS), -160 dBm (BeiDou), -159 dBm (Galileo)
  • Reacquisition: -160 dBm (GPS), -156 dBm (GLONASS), -157 dBm (BeiDou), -153 dBm (Galileo)
  • Cold Starts: -148 dBm (GPS), -145 dBm (GLONASS), -143 dBm (BeiDou), -138 dBm (Galileo)
  • Warm Starts: -157 dBm (GPS), -156 dBm (GLONASS), -155 dBm (BeiDou), -151 dBm (Galileo)
• PPS Accuracy:
  • RMS: 30ns
  • 99%: 60ns
  • PPS Frequency: 0.25Hz to 10MHz (configurable)
  • Speed Accuracy: 0.05m/s
  • Course Accuracy: 0.3 degrees
• Operational Limits:
  • Maximum Acceleration: 4g
  • Maximum Altitude: 50000m
  • Maximum Speed: 500m/s
• Other Specifications
• Communication Interface: UART (4800~921600bps, 9600bps default), I2C (max. 400KHz)
• Update Rate: 1Hz (default), 18Hz (max.)
• Protocols: NMEA 0183 Version 4.0 (V2.1, V2.3 or V4.1 selectable), UBX, RTCM 2.3
• Power Supply: 5V
• Total Current: <40mA@5V (continuous operation)
• Module Current: 23mA@3V (continuous operation, tracking status)
• Operating Temperature: -40℃ to 85℃
• Interfaces and Connectors
  • Raspberry Pi GPIO Header: Standard 40-PIN, supports Raspberry Pi series boards, Jetson Nano
  • USB-to-UART Converter: Onboard CP2102 for serial debugging
  • UART and I2C Interface: for connecting to host boards like Arduino/STM32
  • GNSS Antenna Connector
• UART Selection Jumper:
  • A: Control MAX-M8Q via USB-to-UART
  • B: Control MAX-M8Q via Raspberry Pi
  • C: Access Raspberry Pi via USB-to-UART
• Battery Holder: supports ML1220 rechargeable cell for storing information and quick starts
• Status Indicators: 4 LEDs to indicate module operating status (RXD/TXD, PPS, PWR)
• Dimension: 65 x 31 x 15mm
• Weight: 158g

Package Contents:

• 1x GPS-RTK Rover LC29H(DA) Dual-band L1+L2 for Raspberry Pi
• 2x 20PIN female header
  
• 1x GNSS Antenna
• 1x Connection cable and mounting accessories