Serial Sensor Protocol (en)

This is a 1-byte based protocol to set/get sensor values. The synchronisation is done by sending a 4-byte (SYNC) sync message before each command. Communication is always triggered by the server. Values are always sent big-endian.

Server-to-Client

There are two kinds of command:

1. 0x2? get value command
2. 0x3? set value command

The GET command has always a length of 5 bytes (incl. sync).

Format: 0x53 0x59 0x4E 0x43 CMD (SYNC + CMD)

The GET command has always a length of 9 bytes (incl. sync).

Format: 0x53 0x59 0x4E 0x43 CMD VALUE (SYNC + CMD + VALUE)

Requesting sensor value 1:

Server: 0x53 0x59 0x4E 0x43 0x21
Client: 0x00 0x12 0x34 0x56

Requesting restart count:

Server: 0x53 0x59 0x4E 0x43 0x20
Client: 0x00 0x00 0x00 0x12

Set sensor value 2:

Server: 0x53 0x59 0x4E 0x43 0x32 0x12 0x23 0x34 0x45
Client: 0x00