connect your TX and RX together...?
I have read in somewhere that I can use pin0 and pin 1 to send data to an external device
You can't talk to two devices using the same set of pins.
How can I Take a wire from the RS232 TX output and connect it to the RS232 TX input?
I only want to comunnicate with external device and control it.
SoftwareSerial MyDevice(7,8); // I don't know which is TX and RX...
I have connected pin 2 to 3 to make a loopback. And when I test it I don't get response.