I have been drive mad over the last few weeks now by a problem I really do need to overcome for a model railway project I am working on.,
I just want to have RS485 comms (NOT DUPLEX) fromn a single master to about 6 slaves. Nothing difficult you may say ? Well, I have tried everything, including about 7 or 8 of these boards, and cannot get them to communicate a single byte. I am setting the TxEnablepin high before transmitting and thhen LOW afterwards so I can receive the slavers response, NOTHING. IO have treiud reversinbg th e~A & B leads (twisted pair), I havtriedit with Manos , Unos and now a pair of Megas using the hardware ports. still NOTHING.
If anyone can help me on this I would be Ecstatic !