OpenStint

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OpenStintHackRF & RTL-SDR Powered RC Lap Timing Decoder

OpenStint is an open-source project reading near-field transponders using inexpensive software-defined radios (SDR).

Introduction
Windows downloads
OpenStint Transponders
Simple setup with Raspbery Pi Model 3 B+
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Multi-protocol support

Natively decodes the OpenStint transponder, plus RC3, RC4Hybrid, RC3-clones (MRT, Waldo) and Vostok transponders.

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Off-the-shelf hardware

No soldering or electronics skills required — works with HackRF One and RTL-SDR v3 & v4.

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Supports multiple timing software

Tested with LapBeeps, RCGTiming and ZRound.

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Runs on modest hardware

Low resource requirements — runs even on a Raspberry Pi 3 Model B+.

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RC4 with learning

Supports 3-wire RC4 transponders, including a learning feature to register them.

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Precise passing detection

Accurate passing-time detection based on signal strength.

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Passing speed detection

Estimates the vehicle's passing speed from signal strength.

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Adaptive filtering

Adaptive filters enhance reception quality.