KaraZajac
46 lines
1.1 KiB
Markdown
46 lines
1.1 KiB
Markdown
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layout: default
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---
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# Kia V1 Protocol
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**Rust module:** `src/protocols/kia_v1.rs`
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**Reference:** `REFERENCES/ProtoPirate/protocols/kia_v1.c`
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## Overview
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Kia V1 uses Manchester encoding at 800/1600 µs. 57 bits total: 32 serial + 8 button + 12 counter + 4 CRC. Long preamble (~90 long pairs). CRC4 with offset rules (cnt_high 0 vs ≥ 6).
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## Timing
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| Parameter | Value | Notes |
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|-----------|---------|---------|
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| Short | 800 µs | ±200 µs |
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| Long | 1600 µs | ±200 µs |
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| Min bits | 57 | |
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## Encoding
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Manchester: symbol duration short or long; bit value from transition direction.
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## Frame Layout (57 bits)
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- 32 bits: serial
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- 8 bits: button
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- 12 bits: counter
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- 4 bits: CRC4 (checksum with offset rules)
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## Decoder Steps
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1. **Reset** — Wait for long pulse (preamble).
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2. **CheckPreamble** — Count long pairs until enough; then transition to data.
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3. **DecodeData** — Manchester decode; at 57 bits validate CRC4 and return.
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## Encoder
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Supported; builds preamble and Manchester-encoded 57-bit frame.
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## Frequencies
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433.92 MHz.
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