Different Serial ports problem

Projects Programming
2

Have a look in your arduino folder for Arduino.h

./hardware/arduino/avr/cores/arduino/Arduino.h

Near the top of the file ~line 71, you can see a bunch of defines for the different MCUs, which you can use for conditional compiling within your own sketch.

#ifdef __AVR_ATmega328P__
  //compile for uno
  Serial.println("this is an Uno");
#endif

#ifdef __AVR_ATmega2560__
 //compile for Mega
 Serial.println("this is a mega");
#endif