/**
- Copyright (c) 2009 Andrew Rapp. All rights reserved.
- This file is part of XBee-Arduino.
- XBee-Arduino is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
- XBee-Arduino is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with XBee-Arduino. If not, see http://www.gnu.org/licenses/.
- !!! Adapted for Spark by Paul Kourany, July 2014 !!! */
The XBee library for Spark uses the hardware serial port Serial1 (pins Tx and Rx on the Core) to connect to the XBee module. The USB serial port is used for printing debug messages.