I have a project using 2 Arduino Mega 2560 cards connected to the PC using 2 USB ports (COM 8 / COM 9)
One Mega card uses a switch to change a little code in that card using a string variable "LCDMode".
I would like that variable to be passed to the other Mega card so when the switch is toggled in the first card, the 2nd card sees the change.
Is this possible without connecting the 2 cards using the I2C connection? Can it be done just over USB communication?
Thanks for the help! Mike