An impatient young man. It does not help to ask the same question again, that only fills up the message list. I just did a search here (upper left corner of this page) and got 222 hits on rs485. I know we have discussed this several times and a search will answer his questions.

It serves no purpose to repeat your question, if you feel that you might need to calrify your question, do it in the tread.

Erik