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) https://elecena.pl/product/27691357/m5stack-gps-bds-unit-v1-1-at6668 2025-01-13 https://elecena.pl/product/27691357/m5stack-gps-bds-unit-v1-1-at6668 2025-08-06 https://elecena.pl/product/27691357/m5stack-gps-bds-unit-v1-1-at6668 2025-11-28 https://elecena.pl/product/27691357/m5stack-gps-bds-unit-v1-1-at6668 2025-11-29