Hi. i want to have communication bettwen PC and arduino (via serial monitor). to 10m distance.
So i decided to use a USB to RS485 converter. i will connect a MAX485 to arduino and i will connect a 10m cable from A to A and B to B (between each MAX485)
I'm gonna buy a simple USB to RS485 device (http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=390336868348&ssPageName=ADME:L:OC:US:1123#vi-desc) for that.
my question is simple. How can i control trasmit/recieve mode (DE/RE pins) of MAX485 from the PC? from arduino side i know the way. simple wiring DE and PIN with an arduino's PIN. but i dont know how to do that in the other side? is it posible to do that in some way on FTDI chip?