Arduino Mega serial in and serial out to OLED

Projects Programming
3

The MEGA2560 has 3 extra hardware serial ports. Leave RX and TX (pins 0 and 1) alone so you can use them to debug on the PC through USB. RX1 through TX3 are pins 14-19, you can use 1 set for reading the Supra and another to feed the OLED. They can each have their own speed.

Here I set up a MEGA using Serial (RX/TX) to USB and Serial1 (RX1/TX1) to an audio player:

void setup( void )
{
  Serial.begin( 115200 );
  Serial1.begin( 115200 );
  pinMode( blinkPin, OUTPUT ); // should default LOW
  Serial.println( "\nStartup" );
}

I can read the player as Serial1.read() and the PC as Serial.read().