L1/L5 GNSS RTK HAT

L1/L5 GNSS RTK HAT for Raspberry Pi

A professional-grade, high-precision GNSS RTK HAT based on the u-blox NEO-F9P module. Designed for developers, enthusiasts, hobbyists and industrial users. This board provides centimeter-level positioning using dual-band L1/L5 GNSS and RTK, making it ideal for robotics, drones, outdoor navigation and autonomous systems.

Key Features:

• Dual-Band GNSS (L1/L5): Simultaneous reception of GPS, Galileo, GLONASS, and BeiDou with advanced multipath mitigation, jamming and spoofing detection.
  Position accuracy:
  • RTK Fixed: up to 2 cm
  • RTK Float: centimeter-to-decimeter level
  • Standalone GNSS: 2m CEP
• RTK Base / Rover Support: Configurable as an RTK base station or rover. Supports RTCM correction streams via SPI, USB, or network-based correction services (NTRIP).
• SPI Communication: Fast, low-latency SPI interface for Raspberry Pi, supporting high update rates up to 25 Hz (7 Hz RTK Fixed) for real-time positioning and control loops.
• Timepulse pin (PPS) Connected to GPIO: High-precision PPS output routed directly to Raspberry Pi GPIO. Can be used as an interrupt source for your app, sensor fusion, SDR applications, or as a precise time reference for network time servers.
• Survey-In Mode: Automatic base station position averaging for accurate RTK base configuration.
• Geofencing: up to 4 circular zones
• Geofence Relay Output: Trigger devices or alerts based on configurable geo-location zones.
• Hot Start Capability: Onboard supercapacitor allows hot-start procedure (2 seconds to acquire fix) up to 4h after power loss
• USB-C Interface: Direct access to the u-blox module for configuration, debugging, and data streaming. Compatible with u-center and open-source GNSS tools.
• External Antenna Support: SMA connector with 3,3 V active antenna power supply. Optimized for dual-band L1/L5 GNSS antennas.
• Open-Source Software: GitHub repo with user-friendly library with many examples, link: https://github.com/jimmypaputto/GnssHat

Applications:

• Robotics & autonomous navigation
• Time servers & high-accuracy PPS timing
• Sensor fusion with PPS
• Precision agriculture & surveying
• Geofencing security systems
• Mobile mapping & geospatial data collection
• Drones, UAVs, UGVs & autonomous vehicles
• Outdoor tracking and telemetry
• Research & GNSS experimentation

Package Includes:

• 1x GNSS RTK HAT for Raspberry Pi (u-blox NEO-F9P based)
• Mounting distances and screws
• GPIO header for Raspberry Pi