SparkFun RTK Express
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Use the preprogrammed RTK Express for GNSS positioning, logging and post-processing experiments. It can operate as a receiver or base station and connects to phone or tablet software over Bluetooth through an ESP32-WROOM. The built-in battery supports portable use, with common USB battery banks offering an additional power option.
Before you buy
Plan for a clear sky view, an appropriate antenna and correction data for RTK positioning.
SparkFun SKU: GPS-18442 · Category: GNSS & RTK instruments
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Official product specifications and documentation
EAR summary based on supplier documentation; this is not a hands-on review. Product identity rechecked during the October 25, 2026 sprint. Current SparkFun Originals eligibility was verified with the supplier’s Original: Yes filter during the October 25, 2026 sprint. Affiliate eligibility remains subject to SparkFun's program terms.