SparkFun GNSS Flex pHAT
Description
- SparkFun GNSS Flex pHAT
- Integrates easily with Raspberry Pi and other SBCs
- Supports USB, UARTs, I2C, and SD card interfaces
- Accommodates external GNSS antennas via U.FL or SMA
- Ensures compatibility with standardized pinout
- Offers a solderless and modular upgrade platform
The SparkFun GNSS Flex pHAT is a versatile carrier board designed for seamless integration of GNSS capabilities with single-board computers. It serves as a Raspberry Pi pHAT, featuring pre-soldered headers that eliminate the need for soldering when stacking it onto the headers of compatible devices such as the Raspberry Pi, NVIDIA Jetson Nano, or Google Coral. This design facilitates a modular approach, allowing for straightforward upgrades or repairs by attaching GNSS Flex modules via the provided headers.
The board supports a variety of interfaces, including USB, multiple UARTs, I2C, and SD card connections, depending on the capabilities of the attached GNSS Flex module. It also accommodates external GNSS antennas through either a U.FL connector or an SMA connector, which is bridged to the U.FL connector, ensuring flexibility in antenna selection. The standardized pinout ensures compatibility and ease of use across different setups.
The SparkFun GNSS Flex pHAT is an ideal solution for those seeking to enhance their single-board computers with GNSS functionality, offering a solderless, modular, and easily upgradable platform.
- 1x SparkFun GNSS Flex pHAT

- 65 x 56.75 (L x W)
- 40-pin socket for Raspberry Pi header or similar SBC
- 40-pin header for GNSS Flex modules
- Two 2x20-pin, 2mm-pitch male headers for Flex modules
- USB-C connector
- Direct interface with GNSS Flex Module through the 40-pin headers
- Antenna bridge
- U.FL connector
- SMA connector
- MicroSD card socket
- Qwiic connector
- Indicator LEDs: PWR (Red), PPS (Yellow), RTK (White), PVT (Blue)
- Twenty-four jumpers: Raspberry Pi GPIO isolation (x16), LED power isolation (x4), I2C pull-up resistors (x4)
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Refund Policy
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
Please review the Return Conditions, Return Exceptions and the process on How to Request a Return Authorisation (RA) before initiating a return request.
United Kingdom consumers exercising their statutory Right of Cancellation are subject to different conditions. See the Statutory Right of Cancellation.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
- A valid Return Authorisation (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
- The RA number is valid for 30 days. The returned item must be received within that period.
- The RA number must be included with the return.
- Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
- Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RobotShop's troubleshooting process or of a verified shipping error by RobotShop.
- Refunds are processed within 7 days after receipt and inspection of the returned item.
- A £100 cleaning fee may apply to domestic robots returned in used or unclean condition.
- A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RobotShop's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
- Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
- Consumables * — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tyres, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
- Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
- Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odour-absorbing products). Not eligible for return once unsealed.
- Build-it-yourself products and items requiring customer assembly * — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
- Digital Goods, Software, and Apps * — Final sale only, due to licensing restrictions.
- Clearance Items * — Products identified as clearance or final sale, including end-of-life or discontinued items.
- Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
- On-Demand Items * — Standard catalogue products not stocked by RobotShop and ordered specifically to fulfil a customer request.
- Professional & Specialized Equipment — See the Professional & Specialized Equipment Warranty page and Professional & Institutional Buyers (B2B) section in the Terms & Conditions.
* United-Kingdom consumers retain their statutory Right of Cancellation on these items. Its exercise is subject to the conditions and exclusions set out in the Statutory Right of Cancellation, and any reimbursement may be reduced to reflect a loss in value resulting from handling beyond inspection.
How to Request a Return Authorisation (RA)
While the same return policy applies, these orders require a separate contact process for returns.
- RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
- Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".