I get some troubles to communicate via the 3 extra serial ports of my Arduino Mega board.
I made a program to transcript GPS trames to AIS trames to be read by a Navigation software, until now it worked fine, and since I upgrade Windows 8.1, I can’t communicate with the Serial ports but the USB serial.
The Serial USB port is working fine (blinking Tx led for a test pg), but when I use either Serial1, Serial2, and Serial3 for the same program, I can’t get the signal that should appear. Even the Tx led is not blinking.
Here is the program that im using to test the serial ports.
I am using Windows 8.1 64 bits. I may have forget some informations, it is the first time I post on the forum :).
If anyone gets an idea about where this is comming from, I don’t know what to do anymore