M5Stack Unit GPS/BDS V1.1 AT6668

The Unit GPS/BDS V1.1 from M5Stack is a next-generation GNSS navigation module that enables precise satellite positioning for various applications. The module is based on the powerful CASIC AT6668 navigation chip and additionally integrates the MAX2659 signal amplifier for optimal reception. An integrated ceramic antenna ensures reliable signal reception without external components. The AT6668 supports multi-frequency and multi-modal GNSS signal processing and receives signals from GPS, BeiDou (BD2, BD3), GLONASS, Galileo, and QZSS simultaneously. The position accuracy is less than 1.5 meters in CEP50 mode, which represents a significant improvement over the previous model. With 50 channels and a cold start time of only 23 seconds, the module quickly delivers precise location data. Communication is via UART with a standard baud rate of 115200 bps and the NMEA0183 4.1 protocol. The compact housing features two compatible mounting holes and a HY2.0-4P Grove connector. The module is ideal for vehicle navigation, portable devices, IoT positioning, and drone applications.

Features:

• GNSS chip AT6668 supports GPS, BeiDou, GLONASS, Galileo, and QZSS satellite systems simultaneously.
• Position accuracy of less than 1.5 meters enables precise location determination.
• Cold start time of only 23 seconds ensures rapid readiness.
• Integrated ceramic antenna and MAX2659 signal amplifier ensure optimal reception.
• UART communication with NMEA0183 4.1 protocol offers easy integration.
• Compact design with Grove connector and mounting holes allows flexible installation.

Application examples:

• Vehicle navigation and fleet management with real-time position tracking
• Portable GPS trackers for outdoor activities and geocaching
• IoT positioning solutions for asset tracking and logistics
• Drone control with precise location determination
• Automatic stop announcements in public transport

Documentation:

• M5stack Wiki
• Official M5Stack Forum

Technical data:

• Manufacturer: M5Stack
• Manufacturer SKU: U032-V11
• GNSS module: ATGM336H-6N with AT6668
• Signal amplifier: MAX2659
• Supported satellite systems: GPS, QZSS, BD2, BD3, Galileo, GLONASS
• Frequencies: BDS B1I+B1C, GPS/QZSS/SBAS L1, Galileo E1, GLONASS R1
• Channels: 50
• Position accuracy: <1.5 m (CEP50)
• Update rate: up to 10 Hz
• Protocol: NMEA0183 4.1
• Sensitivity: Tracking -162 dBm, Acquisition -160 dBm, Cold start -148 dBm
• Start time: Cold start 23 s, Warm start 1 s
• Communication: UART, 115200 bps @ 8N1
• Power consumption: DC 5V / 31.64 mA
• Connection: HY2.0-4P (Port C)
• Operating temperature: 0°C to 40°C
• Product dimensions: 48 × 24 × 8 mm
• Product weight: 12.3 g
• Package dimensions: 145 × 100 × 19 mm
• Gross weight: 18 g

Contents:

• 1× Unit GPS V1.1
• 1× HY2.0-4P Grove Cable (20 cm)