GSM Shield with Adafruit Ultimate GPS Breakout
A proposed GPS/GSM combination using the Arduino Telefonica GSM Shield and the Adafruit Ultimate GPS Breakout.
Components- Arduino Uno Arduino GSM Shield(http://arduino.cc/en/Main/ArduinoGSMShield) Adafruit Ultimate GPS Breakout (http://learn.adafruit.com/adafruit-ultimate-gps/overview)
The serial port on the GSM Shield is already being used for modem communications so a workaround needs to be configured to route the GPS inputs via a second serial port. Attempting to use AltSoftSerial Library (http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html) which creates a second softwareserial port on tx=9 and rx=8.