I have a 1x4 switch that I can control via RS-232 from a computer. Using hyperterminal, once I establish communication, I can press n+Enter (n=1 to 4) to directly switch to any of the 4 outputs. I would like to have a small box with 4 pushbuttons that would allow me to directly select the source. Using a computer is overkill, and there is not a lot of extra space for it.
1.) Is there an easy way to accomplish this with arduino?
2.) I am a total arduino noob, and probably don't have the time to learn this on my own in time to get this working. If you would be willing to build such a device (or at least provide the programming) at a reasonable cost, please send me a PM.
Robin2:
I guess Serial.print("n1"); or Serial.println("n1"); would do the same thing as what you do with Hyperterminal
You may need an adapter to change from the Arduino's TTL voltage levels to proper RS232 levels.
...R
If it's that simple, maybe I could do it myself. I would also need a routine to transmit protocols (9600, N, 8, 1) and do the initial handshaking to establish communication between the two devices. Or maybe not? If those parameters are fixed, maybe it will work by just plugging it in. I need to dig deeper into RS-232 communication....