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Published 44 days ago
SDKDartFlutter
PlatformAndroidiOSLinuxmacOSwebWindows
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Metadata

Near-ultrasonic FSK data-over-sound codec in pure Dart: encode a 16-bit payload as 4-FSK symbols in the 18–19.2 kHz band and decode it from raw mic PCM with Goertzel filters. No plugins, no FFI — work [...]

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0.1.0 #

  • Initial extraction from ParkerUp (sound check-in, Phase 11.7a C): 4-FSK encoder + Goertzel decoder, 18-19.2 kHz band, unit tests included.

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Metadata

Near-ultrasonic FSK data-over-sound codec in pure Dart: encode a 16-bit payload as 4-FSK symbols in the 18–19.2 kHz band and decode it from raw mic PCM with Goertzel filters. No plugins, no FFI — works anywhere Dart runs. Extracted from the ParkerUp parking app's sound check-in feature.

Topics

#audio #ultrasonic #data-over-sound #fsk #proximity

License

MIT (license)

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