Motorized screen control
With my previous motorized screen I used RS-232 protocol and a cable with 2 wires (1 for TX and 1 for RX). RX wire was connected to pin 1 and TX to pin 3 in serial connector
With my new screen, the cable control provided has 6 wires inside :
Blue : +5V
Yellow : RX
Green : Up
Red : Stop
Black : Down
White : GND
As you can see, there is no TX wire. So, I've connected Yellow (RX) to Pin 1 in serial connector and tried each others one by one to pin 3 (TX) in serial connector but nothing happens.
When I connect together green/red or blue/red or white/green or white/blue, screen goes down and when I split wires, screen goes up.
With these 6 wires, what do you recommand ? RS232, IO ou Relay and how ?
I can use IR but this is not what I prefer.