Kia V1 Protocol

Rust module: src/protocols/kia_v1.rs
Reference: REFERENCES/ProtoPirate/protocols/kia_v1.c

Overview

Kia V1 uses Manchester encoding at 800/1600 us. 57 bits total: 32 serial + 8 button + 12 counter + 4 CRC. Long preamble (~90 long pairs). CRC4 uses XOR of nibbles over 7 bytes (serial + button + cnt_low + cnt_high) with offset 1.

Timing

Parameter	Value	Notes
Short	800 µs	±200 µs
Long	1600 µs	±200 µs
Min bits	57

Encoding

Manchester: symbol duration short or long; bit value from transition direction.

Frame Layout (57 bits)

• 32 bits: serial
• 8 bits: button
• 12 bits: counter
• 4 bits: CRC4 (XOR of nibbles, 7 bytes, offset 1)

Decoder Steps

1. Reset — Wait for long pulse (preamble).
2. CheckPreamble — Count long pairs until enough; then transition to data.
3. DecodeData — Manchester decode; at 57 bits validate CRC4 and return.

Encoder

Supported; builds preamble and Manchester-encoded 57-bit frame.

Frequencies

433.92 MHz.