{"title":"SparkFun GNSS Flex pHAT - LG290P - SparkFun Electronics","handle":"sparkfun-gnss-flex-phat-lg290p-sparkfun-electronics-gps-28929","url":"/products/sparkfun-gnss-flex-phat-lg290p-sparkfun-electronics-gps-28929","description":"Achieve robust, centimetre-level RTK positioning in challenging RF environments with the SparkFun LG290P GNSS Flex pHAT. This all-in-one development board combines a versatile pHAT carrier with the powerful Quectel LG290P module, featuring advanced anti-jamming technology ideal for navigation in urban canyons, industrial sites, or any location where signal integrity is critical.\n\nThe GNSS Flex pHAT mounts to a Raspberry Pi via an extended 40-pin header and connects to the included GNSS module using standardised 2×10-pin headers, making it simple to swap modules for future upgrades. All necessary standoffs, screws, and an extended header are included.\n\nKey Features\n\n\nCentimetre-Level RTK – 0.8 cm + 1 ppm horizontal accuracy with 5-second convergence time\n\nQuad-Band Multi-Constellation – Receives L1, L2, L5, and L6/E6 bands across GPS, GLONASS, Galileo, BDS, QZSS, and NavIC\n\nAdvanced Anti-Jamming – Built-in NIC anti-jamming unit for professional-grade interference mitigation\n\n1,040 Tracking Channels – Robust performance even in urban canyons or deep tree cover\n\nRaspberry Pi Compatible – Standard 40-pin GPIO header with USB-C alternative data interface\n\nModular Design – SparkPNT GNSS Flex system allows swapping modules for future upgrades\n\nQwiic Connector – For easy I²C expansion\n\nµSD Card Socket – For data logging\n\n\nGNSS Flex pHAT Specifications\n\n\nRaspberry Pi Interface: 40-pin GPIO socket\n\nModule Interface: Two 2×20-pin, 2 mm pitch male headers (UART ×4, I²C, USB, SD, PPS ×2)\n\nUSB-C Port: Direct interface to GNSS Flex module\n\nAntenna: U.FL connector with SMA bridge option\n\nIndicator LEDs: PWR (red), PPS (yellow), RTK (white), PVT (blue)\n\nJumpers: 24 total — GPIO isolation (×16), LED power isolation (×4), I²C pull-ups (×4)\n\n\nLG290P Module Specifications\n\n\nSupply Voltage: 3.15–3.45 V\n\nCurrent Consumption: 91 mA typical (acquisition/tracking), 12 µA backup mode\n\nHorizontal Accuracy: 0.7 m autonomous, 0.8 cm + 1 ppm RTK\n\nVertical Accuracy: 2.5 m autonomous, 1.5 cm + 1 ppm RTK\n\nVelocity Accuracy: 0.03 m/s\n\n1PPS Accuracy: 5 ns (RMS)\n\nUpdate Rate: 10 Hz default, 20 Hz max\n\nTTFF (Cold Start): 28 s\n\nTTFF (Hot Start): 1.7 s\n\nSensitivity: -146 dBm acquisition, -160 dBm tracking\n\nDynamic Limits: 10,000 m altitude, 490 m/s velocity, 4 g acceleration\n\nUART: 3× ports, 9,600–3,000,000 bps (default 460,800 bps), NMEA 0183/RTCM 3.x\n\nOperating Temperature: -40°C to +85°C\n\nModule Size: 12.2 × 16 × 2.6 mm\n\nModule Weight: ~0.9 g\n\n\n\nNote: This product requires an external active GNSS antenna (not included). The GNSS Flex module has a U.FL connector, and the pHAT provides an SMA connector bridged via U.FL — a 50 mm U.FL cable is included for this connection. A Raspberry Pi or similar single-board computer is also required (not included).\n\n\nSupported Constellations & Frequency Bands\n\n\nGPS: L1 C/A, L1C*, L5, L2C\n\nGLONASS: L1, L2\n\nGalileo: E1, E5a, E5b, E6\n\nBDS: B1I, B1C, B2a, B2b, B2I, B3I\n\nQZSS: L1 C/A, L1C*, L5, L2C\n\nNavIC: L5\n\nSBAS: L1 C/A (WAAS, SDCM, EGNOS, BDSBAS, MSAS, GAGAN)\n\n* Feature still under development\n\nIdeal For\n\nHigh-precision RTK surveying and mapping\nAutonomous vehicle and drone navigation\nPrecision agriculture\nBase station and rover configurations\nGNSS research and development\n\n\nPackage Contents\n\n1× SparkFun GNSS Flex pHAT\n1× SparkPNT GNSS Flex Module (LG290P)\n1× Tall GPIO Female Headers (2×20 pin)\n1× 50 mm U.FL to U.FL Cable\n4× Aluminium Hex Standoffs (M2.5, 16 mm)\n8× Phillips Machine Screws (M2.5 × 8 mm)\n\n\nResources\n\nHookup Guide\nLG290P Product Brochure (PDF)\nRTK Application Note (PDF)\nBase Station Mode Application Note (PDF)\nProtocol Specification (PDF)\nHardware Design (PDF)\nFirmware Upgrade Guide (PDF)\nQGNSS Software (v2.x)\n\n\nDesign Files — GNSS Flex pHAT\n\nSchematic (PDF)\nKiCad Files (ZIP)\nBoard Dimensions (PDF)\nSTEP File\n\n\nDesign Files — LG290P Flex Module\n\nSchematic (PDF)\nKiCad Files (ZIP)\nBoard Dimensions (PDF)\nSTEP File\n\n\nGitHub Repositories\n\nGNSS Flex pHAT Hardware\nGNSS Flex Modules Hardware\n","vendor":"SparkFun","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":140,"title":"Default Title","sku":"SF-GPS-28929","mpn":"GPS-28929","price":299.0,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":3,"option1":"Default Title"}]}