Added the sparkfun mpl3115 library and a couple lines of code to add altitude to the display. I'm not doing any over sampling of the pressure sensor, to keep the processing speed of the Teensy up. This caused the altitude to jump around a fair amout. Maybe I can over sample/fliter inside of Processing (the receiver side) to fix that.

Also received the new XBEE Pro SC2 modules with external antenna option. Will make for better antenna placement outside the rocket tube. It would allow for easy connection to a directional antenna for the base station, but that may not be needed with the two mile range.

After some testing, these new XBee Pro SC2 modules with the Teensy, etc use 80mA while transmitting at full power. With the XBee Pro S1 modules it uses almost 40 more mA.