I want to test serial communication between two microcontrollers Arduino UNO and teensy3.6 for now. My end goal is to read GPS data through serial so at this point for testing purpose, I am just sending some fake GPS data on Arduino UNO serial. But when I tried to read the data on teensy It gives me an error saying unable to open com port. I want to know if I am going in the right direction as I thought it to be simple to send data on a serial from one controller and read it from another controller on the same port.
What is the possible reason and does it the right approach? If not suggest some alternatives to test serial data reading by teensy. The fake data can be made by Arduino or some emulator as I tried one too but no success.