Protocol description

WIP

Packets format

The communication with the application is not the easiest but is structured as follows:

SOF: 1 Byte, the "Magic Byte" represent the start of a packet, must be 0x11.
LRC1: 1 Byte, the LRC (Longitudinal Redundancy Check) of the SOF, must be 0xEF.
CMD: 2 Bytes in unsigned Big Endian format, each command have been assigned a unique number (e.g. factoryReset(1020)), this is what you are sending to the device.
STATUS: 2 Bytes in unsigned Big Endian format. If the direction is from APP to hardware, the status is always 0x0000. If the direction is from hardware to APP, the status is the result of the command.
LEN: 2 Bytes in unsigned Big Endian format, the length of the data, maximum is 512.
LRC2: 1 Byte, the LRC (Longitudinal Redundancy Check) of the CMD, STATUS and LEN.
DATA: LEN Bytes, the data to send or receive, maximum is 512 Bytes. This could be anything, for example you should sending key type, block number, and the card keys when reading a block.
LRC3: 1 Byte, the LRC (Longitudinal Redundancy Check) of the DATA.

The total length of the packet is LEN + 10 Bytes. For receiving, it is the exact same format.

Each command and response have their own payload formats.

TODO: