As we seem to repeat a lot of stuff regarding RS485 I thought it may be a good idea to make up a sticky with some information that prospective users may chew on.
As RS485 is an ELECTRICAL standard the info here is not dealing with software at present, maybe we can move the thread elsewhere in the future and add simple RS485 type code.
This link was posted by Brian Fairchild
Removed dead link 16/12/2106 http : // www .lvr. com/rs-485_circuits.htm
I'm adding a couple of PDFs which should be able to be posted without infringing any copyrights. If you feel that some should not be posted I will remove it/them.