Hookup Guide
Schematic (GNSS Flex pHAT)Product Overview
Achieve robust, centimeter-level RTK positioning in challenging RF environments with the SparkFun LG290P GNSS Flex pHAT. This all-in-one development board combines our 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.
The GNSS Flex pHAT acts as the bridge between your Raspberry Pi and the modular SparkPNT ecosystem. It mounts securely via an extended 40-pin header and connects to the included GNSS module using standardized 2x10-pin headers, making it simple to swap modules for future upgrades. This kit includes all the necessary standoffs, screws, and an extended header for a clean, stable setup.
- Raspberry Pi Connectivity: Standard 40-pin GPIO header for a direct, secure connection.
- USB-C Port: Provides an alternative data interface to the GNSS module.
- Mounting Hardware Included: Comes with the necessary standoffs, screws, and an extended header for a clean, stable setup.
Robust Quad-Band RTK
At the heart of this pHAT is the Quectel LG290P, a high-precision receiver engineered for fast convergence and reliable performance when it matters most.
- Advanced Anti-Jamming: A built-in NIC anti-jamming unit provides professional-grade interference detection and mitigation, ensuring signal integrity in complex electromagnetic environments.
- Quad-Band & Multi-Constellation: Simultaneously receives signals from the
L1,L2,L5, andL6/E6bands across all major constellations for robust performance, even in challenging scenarios like urban canyons or deep tree cover. - Centimeter-Level RTK: Delivers high-precision, Real-Time Kinematic positioning for applications requiring exacting accuracy.
- Broad Correction Support: Supports standard RTK/RTCM corrections, a wide range of SBAS augmentation systems, and PPP services*.
This product requires an external antenna. Users have a few options for connecting an external GNSS antenna to their GNSS receiver.
- The GNSS Flex module has a U.FL connector for an external antenna.
- For a sturdier connection, an SMA connector is available on the SparkFun GNSS Flex pHAT that is bridged to a U.FL connector. Users simply need to jumper the U.FL connectors on both the SparkPNT GNSS Flex module and SparkFun GNSS Flex pHAT with a short U.FL cable.
This pHAT also requires a Raspberry Pi (or similar single-board computer). Users can find Raspberry Pi and NVIDIA single-board computers in our catalog. By default, we use the Raspberry Pi's primary serial bus (i.e., TX: GPIO14/Pin 8; RX: GPIO15/Pin 9) to communicate with the GNSS receiver of the SparkPNT GNSS Flex module. However, users can also utilize any of the other interfaces.
*: Feature is still under development. Currently, only the UART interfaces are supported by the LG290P module. Additionally, corrections for some of the PPP services may not have been implemented yet.
