Hello @james1z1j
The LIN bus is a broadcast serial network with one leader node and up to fifteen follower nodes configured on a single wire. A LIN leader node transmits a request, known as a header. The header contains a field called Identifier, which is a 6-bit ID followed by 2 parity bits. The ID identifies each LIN message sent and which nodes should react to it. The parity bits aid followers in determining the validity of the ID so they know whether they should ignore the data transmission, listen to it, or publish data in response.
An overview of LIN can be found in the post Local Interconnect Network (LIN) - NXP Community.
Regards,
Eduardo.