<start-byte><device-id><message-id><payload-length>[<payload><hash>]

byte-mask: SDML[(P*)HH]

A one-byte value that uniquely identifies the client device.

A byte value that allows a message to be separated from another in a short period of time. BPA doesn't store history, so it's enough to distinguish two messages semintaniusly.

A byte value indicating the number of bytes we should read as a payload.

Up to 256 byte array of the message.

Two byte values representing the Fowler-Noll-Vo (FNL) hash of the previous bytes. Here is an example of the hash function:

uint16_t fnv1a_hash16(uint8_t* bytes, size_t length) {
    uint16_t hash = (uint16_t)0x97;
    for (size_t i = 0; i < length; i++)
    {
        hash ^= bytes[i];
        hash *= 0xA1;
    }
    return hash;
}

TBD