The OSEPP™ Fio board has wireless in mind. This board may connect to an XBee radio (sold separately) and has a connector for a lithium polymer battery which can be charged over the USB connection. Microcontroller ATmega328P Clock Speed 8 MHz Flash Memory 32 KB SRAM 2 KB EEPROM 1 KB Operating Voltage 3.3 V Input Voltage 3.35-12 V Digital I/O Pin Count 14 (including 6 for PWM output) Analog Input Pin Count 8 Other Connections Mini-USB (for charging only) ICSP for ATmega328P (requires header) XBee module socket Lithium Polymer battery connector Dimensions 2.56 x 1.10 x 0.47 inches (65.0 x 28.0 x 12.0 mm) Power Source USB or external Lithium Polymer battery Highlights: • 8-bit AVR RISC-based microcontroller running at 8 MHz • On/off slide switch • Charging circuit for lithium polymer battery • Connector for interfacing with XBee modules • Flexible power source (USB or lithium polymer battery) • Compatible with existing Arduino software libraries Features: The ATmega328P comes with the Arduino bootloader preloaded. Should you wish to update or replace the bootloader, there are ICSP (In-Circuit Serial Programming) pin-outs that can be used in combination with a header (sold separately) for the ATmega328P. The bottom of the board comes with pre-mounted headers for connecting to an XBee module for wireless applications. To allow portability, the board can be powered by a lithium polymer battery. The board includes circuitry to allow the battery to be charged via a powered mini-USB connection. A resettable polyfuse on the USB path will trip when the current exceeds 500 mA, preventing board damage.

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SCHEMATIC http://osepp.com/wp-content/uploads/2011/09/OSEPP_Fio_Arduino_Compatible-Rev1.1-Schematic.pdf OSEPP FIO EAGLE FILES https://www.osepp.com/electronic-modules/microcontroller-boards/100-osepp-fio