Multi-GNSS HAT for Raspberry Pi, GPS with L76X

Overview

This is a Raspberry Pi GNSS HAT which supports Multi-GNSS systems: GPS, BDS, and QZSS, with advantages such as fast positioning, high accuracy, low power consumption, and so on.

It is an easy way to enable global positioning function for your Raspberry Pi.

Features

• Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards, Jetson Nano
• Supports Multi-GNSS systems: GPS, BDS, and QZSS
• EASY™, self track prediction technology, help quick positioning
• AlwaysLocate™, intelligent controller of periodic mode for power saving
• Supports DGPS, SBAS (WAAS/EGNOS/MSAS/GAGAN)
• UART communication baudrate: 4800~115200bps (9600bps by default)
• Onboard battery holder, supports ML1220 rechargeable battery, for preserving ephemeris information and hot starts
• 4x LEDs for indicating the module working status
• Comes with development resources and manual (examples for Raspberry Pi/Jetson Nano/Arduino/STM32)

GNSS Specifications

• Band: GPS L1(1575.42Mhz), BD2 B1 (1561.098MHz)
  • Channels: 33 tracking ch, 99 acquisition ch, 210 PRN ch
  • C/A code
  • SBA: WAAS, EGNOS, MSAS, GAGAN
• Horizontal position accuracy:
• Autonomous: <2.5mCEP
• Time-To-First-Fix @-130dBm (EASY™ enabled):
• Cold starts: <15s
• Warm starts: <5s
• Hot starts: <1s
• Sensitivity:
• Acquisition: -148dBm
• Tracking: -163dBm
• Re-acquisition: -160dBm
• Dynamic performance:
• Altitude (max): 18000m
• Velocity (max): 515m/s
• Acceleration (max): 4G

General Specifications

• Communication interface: UART
• Baudrate: 4800~115200bps (9600bps by default)
• Update rate: 1Hz (default), 10Hz (max)
• Protocols: NMEA 0183, PMTK
• Power supply voltage: 5V / 3.3V
• Operating current: 13mA
• Operating temperature: -40℃ ~ 85℃
• Dimensions: 65mm x 30.5mm

Applications

• Vehicle tracking
• Asset tracking
• Security system
• Industrial PDA
• GIS application

What's on Board

1. L76B module
2. CP2102: USB TO UART converter
3. CAT24C32: EEPROM
4. RT9193-33: power manager
5. Backup mode wakeup button
6. Standby switch
7. Indicators:
   • RXD/TXD: UART RX/TX indicator
   • PPS: GPS status indicator
   • PWR: power indicator
8. Raspberry Pi GPIO connector: for connecting with Raspberry Pi
9. USB TO UART port
10. GNSS antenna connector
11. Battery holder: supports ML1220 rechargeable battery, for preserving ephemeris information and hot starts
12. UART selection jumpers
    • A: control the L76B through USB TO UART
    • B: control the L76B through Raspberry Pi
    • C: access Raspberry Pi through USB TO UART