  8, 9, 10, 11, 14 (MISO), 15 (SCK), 16 (MOSI).
 
  created 18 Apr. 2011
- modified 25 May 2012
+ modified 19 March 2016
  by Tom Igoe
  based on Mikal Hart's twoPortRXExample
 


 The circuit:
 Two devices which communicate serially are needed.
 * First serial device's TX attached to digital pin 2, RX to pin 3
 * Second serial device's TX attached to digital pin 4, RX to pin 5

 Note:
 Not all pins on the Mega and Mega 2560 support change interrupts,

 */

#include <SoftwareSerial.h>
// software serial #1: RX = digital pin 10, TX = digital pin 11
SoftwareSerial portOne(10, 11);

// software serial #2: RX = digital pin 8, TX = digital pin 9
// on the Mega, use other pins instead, since 8 and 9 don't work on the Mega
SoftwareSerial portTwo(8, 9);

