Product Overview

The GPS & BDS Positioning Module is a high-performance BDS/GNSS positioning and navigation module based on the Unicorecomm ATGM336H-5N chip. It supports multiple satellite navigation systems including China's BeiDou-2 and BeiDou-3 (all satellites 1-63), US GPS, Russian GLONASS, and Japan's QZSS, capable of simultaneously receiving signals from these systems for combined positioning, navigation, and timing.

This module features high sensitivity, low power consumption, and low cost, making it suitable for a variety of applications including vehicle navigation, handheld positioning, wearable devices, and robotics development.

Key Advantages

Multi-Satellite System Joint Positioning

Supports four major satellite navigation systems: BDS, GPS, QZSS, and GLONASS. Supports single-system independent positioning or any combination for joint positioning. Equipped with a 32-channel high-sensitivity receiver for more stable and reliable positioning.
High-Precision Positioning

Positioning accuracy of 2.5 meters (CEP50), cold start acquisition sensitivity -148dBm, tracking sensitivity -162dBm. Features π-type antenna network design with 50Ω impedance matching, antenna VSWR below 1.6 for optimal receiving power.
Fast Positioning

Cold start in 32 seconds, fast hot start acquisition, supports A-GNSS assisted positioning for rapid satellite signal search.
Multi-Interface Support

Plug-and-play USB serial port, also supports TTL serial connection. Built-in antenna detection and short-circuit protection. Onboard PH2.0 serial port and USB Type-C interface.
Comprehensive Development Examples

Open-source development tutorials provided for 51 MCU, Arduino, STM32, Jetson Nano, Raspberry Pi, and ROS.
Deep ROS Integration

Supports data reading, trajectory plotting, IMU fusion, Move_Base navigation, and more.
Complete Coordinate System Conversion

Provides a complete WGS-84 to GCJ-02 to BD-09 coordinate system conversion solution.
Companion PC Software

GnssToolKit3 visualization tool supporting satellite status viewing, data logging, and KML export.

Hardware Overview

GPS & BDS Module Hardware Structure

Technical Specifications

Module Model	ATGM336H-5N
Signal Reception	BDS/GPS/QZSS/GLONASS
RF Channels	32 channels, supports simultaneous multi-system reception
Cold Start TTFF	≤32 seconds
Hot Start TTFF	≤1 second
Reacquisition TTFF	≤1 second
Cold Start Acquisition Sensitivity	-148dBm
Hot Start Acquisition Sensitivity	-156dBm
Reacquisition Sensitivity	-160dBm
Tracking Sensitivity	-162dBm
Positioning Accuracy	<2.5 meters (CEP50)
Velocity Accuracy	<0.1m/s
Position Update Rate	Default 1Hz, max 10Hz
Serial Port Characteristics	Baud rate range: 4800bps-115200bps, default 9600bps
Protocol	NMEA-0183
Maximum Altitude	18,000m
Maximum Velocity	515m/s
Maximum Acceleration	4g
Supply Voltage	3.3V-5V
BDS+GPS Typical Power Consumption	25mA @ 3.3V
Operating Temperature	-40℃ to +85℃
Storage Temperature	-45℃ to +125℃

Pin Definitions

Pin 1	5V - 5V Power Input
Pin 2	GND - Ground
Pin 3	RES - Module Reset Pin
Pin 4	PPS - Pulse Per Second Output
Pin 5	TX - TX Serial Data Output
Pin 6	RX - RX Serial Data Input (Optional)

Key Features

GPS, GLONASS, BeiDou multi-mode joint positioning and navigation
Low power / high sensitivity / low cost
WiFi positioning in low-signal areas with A-GNSS fast satellite search
Longitude, latitude, and altitude positioning
Positioning accuracy output
A-GNSS assisted positioning for faster startup
UTC time and date from satellites
Antenna detection and short-circuit protection
Velocity information output
Ground speed and heading velocity output
Satellite information: number of connected satellites, positions, and validity

Compatibility

Connecting to SBC or PC

PC Connection

Raspberry Pi Connection
Connecting to MCU Development Boards

Arduino Connection

STM32 Connection

51 Dev Board Connection

Technical Support

For detailed technical documentation and tutorials, please refer to our official resources. Community technical support is also available to help accelerate your project implementation.

Documentation

Arduino Example Code
STM32 Example Code
Python Example Code
ROS Tutorials
Jetson Nano Tutorials
Raspberry Pi Tutorials
Coordinate System Conversion Guide
GnssToolKit3 Software

Parts List

Juxi GPS & BDS Positioning Module	1 - Main Module
3m Active GPS Antenna	1 - High-gain antenna for faster satellite acquisition
USB Type-C Data Cable	1 - For connecting to PC or dev board
PH2.0 Dupont to Jumper Wire 5-Pin	1 Set - For TTL serial connection

GPS & BeiDou GNSS Positioning Module — Multi-System, 2.5m Accuracy, ROS Support