M5Stack Unit GPS / BDS with SMA Antenna AT6668

The M5Stack Unit GPS / BDS is a high-precision GNSS unit designed for global positioning and navigation. It integrates the powerful ATGM336H module, which is based on the AT6668 chip, and offers support for multiple satellite navigation systems, including GPS, BDS, GALILEO, and GLONASS. The external active SMA antenna provides reliable signal strength and precise positioning, even in environments with weak reception. With a position accuracy of less than 1.5 meters and support for multi-system positioning, the unit is excellent for applications in vehicle navigation, IoT devices, drones, and portable devices. Thanks to its user-friendly interfaces and robust construction, it is versatile and compatible with platforms such as Arduino and UIFlow.

Features:

• Multi-Satellite Support: Compatible with GPS, BDS, GALILEO, GLONASS, QZSS, and SBAS for maximum flexibility.
• Precise Positioning: With a position accuracy of less than 1.5 meters, the unit offers the highest accuracy.
• External Active Antenna: The SMA antenna provides stable signal strength with 30 dB gain.
• Fast Signal Processing: The AT6668 chip enables quick calibration with a cold start time of only 23 seconds.
• User-Friendly Communication: Supports UART interface with a standard baud rate of 115200bps.
• Energy Efficient: Low power consumption with standby consumption of only 31.64 mA at 5 V.

Application Examples:

• Vehicle Navigation: Precise routing and real-time location tracking.
• IoT Devices: Position tracking for smart applications.
• Drone Navigation: Safe and stable flight control.
• Portable Devices: Use in fitness trackers and outdoor gadgets.
• Public Transportation Systems: Support for navigation and information systems.

Documentation: 

• M5Stack Wiki
• Official M5Stack Forum

Technical Specifications:

• Manufacturer: M5Stack  
• Manufacturer SKU: U190 
• Chip: AT6668
• Supported Systems: GPS, BDS, GALILEO, GLONASS, QZSS, SBAS
• Channels: 50
• Communication: UART (Standard: 115200bps)
• Accuracy: <1.5 m (CEP50)
• Sensitivity: Tracking -162 dBm, Acquisition -160 dBm
• Antenna: SMA active, 30 dB gain, frequency range 1555–1580 MHz
• Power Consumption: Standby 31.64 mA, Operating 40.90 mA @ 5 V
• Dimensions: 71.4 x 24 x 8 mm
• Weight: 58g

Package Contents:

• 1x M5Stack Unit GPS / BDS
• 1x External active SMA antenna (1 m cable length)
• 1x HY2.0-4P cable (20 cm)