M5Stack GPS/BDS Unit v1.1 (AT6668)

This GPS Unit is a global navigation module that provides accurate satellite positioning services. It combines the CASIC navigation chip AT6668 with the MAX2659 signal amplifier chip and has a built-in ceramic antenna for better positioning performance.

The AT6668 chip supports multi-frequency and multi-mode GNSS signal reception, letting it work with multiple satellite systems such as GPS, BD2, BD3, GLONASS, GALILEO, and QZSS. This allows it to provide combined positioning using multiple systems or standalone positioning with a single system.

With improved anti-interference and positioning accuracy from the original unit, the GPS Unit v1.1 can quickly acquire precise location data, even in areas with weak signal strength (Those pesky mountains!)

Features

• Supports multiple satellite navigation systems (GPS/QZSS/BD2/BD3/GAL/GLO)
• Multi-frequency and multi-system reception
• Multi-channel
• Low power consumption
• 2x LEGO-compatible holes
• Programming platforms: Arduino, UIFlow, etc.

Specifications

SoC	AT6668
Supported Systems	GPS/QZSS/BD2/BD3/GAL/GLO
	Frequencies:
	BDS: B1I+B1C
	GPS/QZSS/SBAS: L1
	GALILEO: E1
	GLONASS: R1
Channels	50 channels
Communication	UART communication, default 115200bps@8N1 Note: Some customers have reported that their device is defaulted to 115200bps@7N1
Positioning Accuracy	<1.5m (CEP50)
Update Rate	Max 10Hz
Protocol	NMEA0183 4.1
Sensitivity	Tracking: -162dBm, Acquisition: -160dBm, Cold Start: -148dBm
Start Time	Cold Start: 23 seconds, Hot Start: 1 second
Power Consumption	DC5V/31.64mA
Product Size	48 x 24 x 8mm
Package Size	136 x 92 x 9mm
Product Weight	12.3g
Package Weight	17.7g

Resources

• Product Wiki

Package Contents

• 1x GPS Unit v1.1
• 1x HY2.0 4-pin Cable (20cm)