Description Waveshare MAX-M8Q GNSS HAT for Raspberry Pi is a high-performance GNSS HAT built around the u-blox MAX-M8Q receiver, designed for Raspberry Pi and also suitable for Jetson Nano, Arduino, and STM32 development through its breakout interfaces. This Raspberry Pi GNSS HAT supports multi-constellation reception with concurrent use of up to three GNSS satellite systems from GPS, BeiDou, Galileo, and GLONASS, while maintaining low power consumption and stable positioning performance. The MAX-M8Q GNSS module also supports augmentation systems including SBAS, QZSS, IMES, and D-GPS, as well as A-GNSS for faster first fixes. With -167dBm navigating sensitivity, anti-spoofing and anti-jamming capability, configurable U-Center support, UART and I2C interfaces, and an onboard battery holder for hot starts, this board is well suited for asset tracking, fleet management, industrial PDA, GIS applications, security systems, and other location-aware embedded projects. Features MAX-M8Q-based GNSS HAT for Raspberry Pi with multi-constellation support. Concurrent reception of up to 3 GNSS systems from GPS, BeiDou, Galileo, and GLONASS. Supports augmentation systems including SBAS, QZSS, IMES, and D-GPS. A-GNSS support for reduced time-to-first-fix and improved acquisition sensitivity. -167dBm navigating sensitivity with strong anti-spoofing and anti-jamming performance. Supports geo-fencing and works with U-Center for module configuration. Standard Raspberry Pi 40PIN GPIO header, compatible with Raspberry Pi series boards and Jetson Nano. Onboard CP2102 USB to UART converter for serial debugging and module access. Breaks out UART and I2C interfaces for Arduino, STM32, and other hosts. ML1220 battery holder for ephemeris preservation and faster hot starts. 4 status LEDs for RXD, TXD, PPS, and power indication. Includes official development resources for Raspberry Pi, Jetson Nano, Arduino, and STM32. Specifications GNSS Specifications Module MAX-M8Q Receiver Engine 72-channel u-blox M8 engine Supported Systems GPS, GLONASS, BeiDou, Galileo, SBAS, QZSS, IMES, D-GPS Frequency Band GPS L1C/A, SBAS L1C/A, QZSS L1C/A, QZSS L1 SAIF, GLONASS L1OF, BeiDou B1I, Galileo E1B/C Horizontal Positioning Accuracy 2.5m CEP (GPS & GLONASS / GPS), 4.0m CEP (GLONASS), 3.0m CEP (BeiDou) Max Navigation Update Rate 10Hz (GPS & GLONASS), up to 18Hz max depending on constellation Time-To-First-Fix Cold start: 26s to 45s, Hot start: 1s, Aided start: 2s to 7s Navigating Sensitivity Up to -167 dBm PPS Accuracy 30ns RMS, 60ns at 99% PPS Frequency 0.25Hz to 10MHz configurable Velocity Accuracy 0.05m/s Heading Accuracy 0.3 degree Operational Limits Acceleration 4g max, Altitude 50000m max, Velocity 500m/s max Other Specifications Communication Interface UART (4800 to 921600bps, 9600bps default), I2C / DDC up to 400KHz Protocol NMEA 0183 v4.0 (v2.1, v2.3, v4.1 selectable), UBX, RTCM 2.3 Update Rate 1Hz default, 18Hz max Power Supply 5V Overall Current
