Let me tell you a bit about my project. I want to build a big structure on top of the Zumo 324U to which I will hook up quite a number of sensors and actuators. It will look ridiculous for sure. Because of the large number of sensors, I will need to hook up an Arduino Mega to these which will act as a middle man between all of sensor results and the Zumo. I’ve looked at the pin layout of the Zumo324U and decided that for my use case, getting rid of the LCD to use the RX and TX pins to send data back and forth between the arduino and the zumo is my best option.
As to wiring the arduino mega to the zumo32U4, I hooked up the arduino RX to the mega TX and vice-versa, while also hooking up the arduino ground pin to the zumo ground pin. This should take care of the exchange of information between them from the hardware side.
Now, as to the coding, this is where I encounter issues since I am not very experienced with either Arduino or Zumo. From my understanding, I need to program these two boards separately which is fine. But I am not sure how to proceed with the communication between them. To send data from the arduino I think I need to use Serial.write(), but I am not sure how to read it from the Zumo side or how to send data to Arduino.
If anybody has tried this before and has any snippets of code that I could look at I would be eternally grateful.