M5Stack GPS/BDS Unit v1.1 (AT6668) Multi-System GNSS Navigation Module

The M5Stack GPS/BDS Unit v 1.1 is a high-precision GNSS global positioning and navigation module designed for applications requiring accurate location data. Powered by the ATGM336H-6N module with AT6668 solution, this compact unit measures 1.89 x 0.94 x 0.31 inches and weighs just 0.43 ounces. It supports multiple satellite navigation systems including GPS, QZSS, BeiDou (BD2/BD3), GALILEO, and GLONASS, with 50-channel reception capability for enhanced signal acquisition. The built-in ceramic antenna enables multi-frequency and multi-system signal reception across B1I, B1C, L1, E1, and R1 frequencies. With positioning accuracy of less than 1.5 m (CEP50) and update rates up to 10Hz, this unit delivers reliable performance even in challenging signal environments.

It features impressive sensitivity ratings of -162dBm for tracking and achieves cold start in just 23 seconds, hot start in 1 second. The module communicates via UART at 115200bps using NMEA0183 4.1 protocol and operates on DC 5V with low power consumption of 31.64 mA. Two Interlocking-Brick compatible mounting holes provide flexible installation options. Compatible with Arduino, UIFlow, and other programming platforms, this unit is ideal for in-vehicle navigation systems, IoT positioning devices, and other applications requiring precise location tracking.