LC29H(DA) GPS/RTK HAT for Raspberry Pi

This LC29H(DA) HAT has L1+L5 dual-frequency and multi-GNSS signal tracking, significantly reducing multipath effects in urban environments and strengthening positioning accuracy with low power consumption. Equipped with a built-in LNA and SAW filter, it has high sensitivity and strong anti-interference capability. Utilising dual-band positioning and RTK technology, it provides centimetre-level high-precision positioning, making it ideal for real-time tracking systems and sharing economy applications, including drones, smart farm machinery, and shared two-wheelers. It supports fast convergence dual-band RTK centimetre-level positioning for high-precision terminal device applications.

The HAT features a standard Raspberry Pi 40-pin GPIO extension header, providing compatibility with Raspberry Pi series boards and Jetson Nano. It supports simultaneous tracking of L1+L5 dual-band satellite signals, reducing multipath effects and enhancing positioning accuracy in urban canyons. It also supports concurrent reception of multi-GNSS systems (GPS, BDS, GLONASS, Galileo, and QZSS) while maintaining low power consumption. The built-in low noise amplifier and acoustic surface filter deliver -165dBm high sensitivity and improved anti-interference performance. Comprehensive online development resources and a manual with Python examples for Raspberry Pi and Jetson Nano are included to assist with development.

We also have the

• LC29H(AA) GPS HAT to improve the positioning performance of service areas
• LC29H(BS) GPS/RTK HAT to setup an RTK base station

Note: The 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 fast convergence dual-band RTK centimetre-level positioning, suitable for high-precision positioning of terminal devices
• Built-in low noise amplifier and acoustic surface filter to provide -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 provide navigation accuracy
• A-GNSS (Assisted GNSS) support, reducing the time to first fix (TTFF) with a 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
    Supports 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 Rover
Positioning Accuracy	PVT	1m CEP
	RTK	0.01m+1ppm CEP
Navigation Update Rate	PVT	1~10Hz
	RTK	1Hz
	RAW	1Hz
RTK Convergence Time	<10s
Time to First Fix (AGNSS OFF)	Cold Starts	26s
	Hot Starts	1s
	Aided Starts	16s
Time to First Fix (EASY ON)
Time to First Fix (AGNSS ON)	Cold Starts	5s
	Hot Starts	5s
	Aided Starts	5s
Sensitivity	Tracking and Navigating	-165dBm
	Re-Acquisition	-157dBm
	Cold Starts	-145dBm
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℃
Dimensions	65 x 30.5mm

Connection Example – Raspberry Pi & GPS Antenna

Resources

• Product Wiki

Pinout

Package Contents

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