Hello all !
I'm trying to interface with a 8 channel relay board using a SN75176BP with rs-485 protocol bought there : http://www.sigma-shop.com/product/47/rs485-8-channel-relay-controller-12vdc-rs485-bus-id-01-relays-1-8.html
8 data, no parity, 1 stop bit
The command to send to the controller board seems simple :
Relay 1 commands: OFF command : FF 01 00 (HEX) or 255 1 0 (DEC) ON command : FF 01 01 (HEX) or 255 1 1 (DEC)
But nothing works...Any helps would be appreciate (sample code + schema). I have an Arduino Mega.
Original topic there : http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1272038904