LC29H(BS) GPS/RTK HAT for Raspberry Pi

This GPS/RTK HAT can track dual-frequency L1+L5 GNSS signals, substantially reducing multipath interference in urban environments and enhancing positioning accuracy. This module is compatible with Raspberry Pi series boards and Jetson Nano through its standard 40-pin GPIO extension header.

It supports concurrent reception of multiple GNSS systems, including GPS, BDS, GLONASS, Galileo, and QZSS, which enables it to provide consistent and low-power consumption tracking. It has RTK technology for centimetre-level positioning accuracy, which is important for real-time tracking systems. Additionally, it includes a built-in low noise amplifier (LNA) and a surface acoustic wave (SAW) filter, which boost its sensitivity to -165dBm and strengthen its anti-interference capabilities, making it suitable for a variety of projects that require precise and reliable geolocation data.

We also have the

• LC29H(AA) GPS HAT to improve the positioning performance of service areas
• LC29H(DA) GPS/RTK HAT for high-precision positioning of terminal devices

Note: Raspberry Pi boards are NOT included.

Features

• Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards, Jetson Nano
• Supports simultaneous tracking of L1+L5 dual-band satellite signals, reducing multipath effects in urban canyons and improving positioning accuracy
• Supports concurrent receiving of multi-GNSS systems (GPS, BDS, GLONASS, Galileo and QZSS) while maintaining low power consumption
• Supports GNSS raw observation and correction data output, suitable for establishing RTK base station
• Built-in low noise amplifier and acoustic surface filter to realize -165dBm high sensitivity and enhance anti-interference performance
• Supports multi-frequency active interference cancellation, effectively suppressing or eliminating narrowband signal (WiFi/2/3/4/5G) interference to ensure navigation accuracy
• A-GNSS (Assisted GNSS) support, reducing the time to first fix (TTFF) with cold start when powered on to 5 seconds
• Support QGNSS software, easy to set various module functions
• Onboard battery holder, supports ML1220 rechargeable cell, for preserving ephemeris information and hot starts
• Onboard 4 LED indicators for module operating status
• Comes with online development resources and manual (Python examples for Raspberry Pi/Jetson Nano)

What’s on Board

1. LC29H module
2. RT9166A-28PXL
   5V to 2.8V LDO chip
3. CP2102N
   USB to UART chip
4. Raspberry Pi 40PIN GPIO header
   for connecting with Raspberry Pi
5. UART selection jumper
   A: control the LC29H via USB to UART
   B: control the LC29H via Raspberry Pi
   C: access Raspberry Pi via USB to UART
6. IPEX 1 connector
   LC29H module antenna connector
7. Micro USB interface
8. RT9193-33PB
   5V to 3.3V LDO chip
9. RESET button
   reset the LC29H module
10. Status Indicators
    PWR: Power Indicator
    RXD/TXD: UART transceiver indicator
    PPS: GPS status indicator
11. NDC7002N
    I2C voltage translator
12. ML1220 Battery holder
    ML1220 rechargeable cell, for preserving ephemeris information and hot start

Specifications

Frequency Band	GPS/QZSS: L1C/A, L5 BDS: B1I, B2a Galileo: E1, E5a GLONASS: L1
Number of Concurrent GNSS	GPS/QZSS+BDS+Galileo+GLONASS
SBAS (WAAS, EGNOS, MSAS, GAGAN)	N/A
RTK Function	RTK Base
Positioning Accuracy	PVT	N/A
	RTK	N/A
Navigation Update Rate	PVT	N/A
	RTK	N/A
	RAW	N/A
RTK Convergence Time	N/A
Time to First Fix (AGNSS OFF)	Cold Starts	N/A
	Hot Starts	N/A
	Aided Starts	N/A
Time to First Fix (EASY ON)	N/A
Time to First Fix (AGNSS ON)	Cold Starts	N/A
	Hot Starts	N/A
	Aided Starts	N/A
Sensitivity	Tracking and Navigating	-165dBm
	Re-Acquisition	-159dBm
	Cold Starts	-147dBm
Velocity Accuracy	N/A
PPS Accuracy	N/A
Dynamic Performance	Acceleration (Max): 4g
	Altitude (Max): 10000m
	Velocity (Max): 500m/s
Communication Interface	UART (9600~3000000bps, 115200bps by default) I2C (Max 400KHz)
Protocol	NMEA 0183 V4.10, RTCM 3.x
Power Supply	5V
Overall Current	<40mA@5V (Continue mode)
Operating Temperature	-40~85°C
Dimensions	65 x 30.5mm

Connection Example – Raspberry Pi

Resources

• Product Wiki
• Schematic

Pinout

Package Contents

1. 1x LC29H(BS) GPS/RTK HAT
2. 2x 20-pin female header
3. 1x GPS External Antenna (D)
4. 1x IPEX 1 to SMA cable ~17cm
5. 1x Screws pack