Equip your Raspberry Pi with robust, centimetre-level RTK positioning, full tilt compensation, and advanced anti-jamming using this quad-band GNSS pHAT featuring the Quectel LG290P.
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Harness the power of Quectel's advanced GNSS technology with the SparkFun LG290P & IM19 GNSS Flex pHAT. This all-in-one module pairs the robust, quad-band LG290P RTK receiver with our proven IM19 IMU, delivering centimetre-level accuracy with full tilt compensation and superior anti-jamming performance.
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 repairs or future upgrades.
Raspberry Pi Connectivity: Standard 40-pin GPIO header for a direct, secure connection.
Mounting Hardware Included: Comes with the necessary standoffs, screws, and an extended header for a clean, stable setup.
At the core of the Module on the pHAT is the Quectel LG290P, a high-precision, multi-constellation GNSS receiver. It is engineered for fast convergence times and reliable performance, even in challenging conditions. It simultaneously receives signals from the L1, L2, L5, and L6/E6 bands across all major constellations.
RTK & PPP Ready: Supports standard RTK and RTCM corrections, SBAS augmentation, and multiple PPP services (including BDS PPP-B2b, QZSS CLAS, and Galileo HAS).
Advanced Anti-Jamming: A built-in NIC anti-jamming unit provides professional-grade interference detection and mitigation, ensuring signal integrity in complex electromagnetic environments.
Reliable in Tough Scenarios: Embedded algorithms ensure dependable positioning even in challenging situations, such as dense urban canyons and deep tree cover.
Paired with the LG290P is the Feyman (FMI) IM19 IMU, which combines MEMS sensor data with the GNSS RTK positioning data to provide high-precision attitude measurements. This enables advanced features, like tilt-compensated surveying and robust navigation through brief GNSS outages.
Survey-Grade Accuracy: Delivers roll and pitch measurements accurate to within 0.05 degrees.
Tilt Compensation: No more perfectly vertical survey poles! The IM19 can calculate a virtual digital level point at any tilt angle, revolutionizing field data collection.
Sensor Fusion: Offers a continuous navigation solution (Dead Reckoning) even during brief GNSS signal loss, making it ideal for urban or obstructed environments.
This GNSS Flex pHAT has been designed for the LG290P and IM19 to work in symbiosis. By default, the LG290P's navigation data is automatically fed to the IMU. The IM19 then outputs proprietary NMEA messages containing the fully compensated position and attitude (roll, pitch, and yaw). This default link can be easily reconfigured via onboard jumpers to suit your specific project needs.
This product requires an external antenna and a GNSS Flex carrier board. 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 catalogue. 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 and an alternate serial bus (i.e,. TX: GPIO04/Pin 7; RX: GPIO05/Pin 29) to communicate with the IMU of our SparkPNT GNSS Flex modules. However, users can also utilise any of the other interfaces.
*According to Quectel, support for the I²C interface is still under development and will be made available through a future firmware update.
GNSS Flex pHAT:
GNSS Flex Module - LG290P and IM19:
Flex Module Interfaces:
LG290P General Features:
IM19 General Features:
*: Feature is still under development
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