GPS & BeiDou GNSS Positioning Module
Overview
The GPS & BDS positioning module is based on the ATGM336H-5N chip, supporting BeiDou B2/B3 (all satellites 1-63), GPS, GLONASS, and QZSS — with simultaneous multi-system reception for joint positioning, navigation, and timing.
Key features:
- BDS/GPS/QZSS/GLONASS four satellite systems (single or any combination)
- 32-channel high-sensitivity receiver
- Positioning accuracy 2.5m (CEP50), cold start 32s
- Plug-and-play USB serial + TTL serial
- Open-source tutorials for Arduino/Jetson/Raspberry Pi/ROS
Specifications
| Category | Spec |
|---|---|
| Chip | ATGM336H-5N |
| Satellite Systems | BDS / GPS / QZSS / GLONASS |
| Channels | 32, simultaneous multi-system |
| Accuracy | <2.5m (CEP50) |
| Update Rate | Default 1Hz, max 10Hz |
| Baud Rate | 4800-115200bps (default 9600) |
| Sensitivity | Cold start -148dBm, tracking -162dBm |
| Power | 25mA @ 3.3V |
| Operating Temp | -40℃ to +85℃ |
| Interface | USB Type-C / TTL serial (PH2.0) |
Pinout
| Pin | Function |
|---|---|
| 5V | Power input |
| RES | Module reset |
| PPS | Pulse-per-second output |
| TX | Serial data output |
| RX | Serial data input (optional) |
Quick Start
1. Connect Antenna
Connect the 3m active GPS antenna, placing it in an open area (outdoors or window side) for fast satellite acquisition.
2. USB to PC/Host
Type-C direct connection, plug and play (default 9600bps).
3. Verify Positioning
# Parse NMEA data
pip install pynmea2
import serial
import pynmea2
ser = serial.Serial('/dev/ttyUSB0', 9600, timeout=1)
while True:
line = ser.readline().decode(errors='ignore')
if line.startswith(('$GPRMC', '$GNRMC')):
msg = pynmea2.parse(line)
print(f'Lat: {msg.latitude}, Lon: {msg.longitude}')4. ROS Integration
Supports ROS positioning nodes, combinable with IMU fusion and Move_Base navigation.
Tools & Resources
- GnssToolKit3: visualization tool — satellite status, data logging, KML export
- Coordinate conversion: WGS-84 → GCJ-02 → BD-09 complete solution
- Examples: Arduino / Python / Jetson Nano tutorials
FAQ
Q: Slow positioning or no signal?
A: The antenna must be in an open area; check the connection; cold start takes 32s — be patient on first boot.
Q: How many satellite systems?
A: BDS, GPS, QZSS, GLONASS — single or any combination.
Q: Can I connect to an MCU?
A: Yes. TTL serial (PH2.0) supports MCU boards, with 51/Arduino/STM32 tutorials.
Q: Output format?
A: Standard NMEA 0183 protocol.
Support
- 📧 Email: support@juxitech.com
- 🌐 Website: www.juxitech.com
- 💬 Report Issues