Probably the most common protocol used in industry on RS485 links is the Modbus protocol. Here is a good start on understanding the standard. Library code is avalible but I don't know if a Arduino specific library has been contributed yet.
Lefty
Probably the most common protocol used in industry on RS485 links is the Modbus protocol. Here is a good start on understanding the standard. Library code is avalible but I don't know if a Arduino specific library has been contributed yet.
Lefty