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Fio v3 - ATmega32U4

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The Fio v3 is a new spin on the Arduino Fio hardware powered by the ATmega32U4.Not only is it small and LiPo-ready, it\'s a very capable XBee-ready development board.

The JST-connector and 3.3v system voltage make this a great development tool for portable devices, simply plug in a Li-Poly battery and you\'re ready to go. Wireless sensor networks and communication are made easy by the on-board XBee socket.

The ATmega32U4, running at 8MHz, makes it possible for you to use the on-board USB jack not only to charge a connected Li-Poly battery but to actually program the device! Because this board uses a similar bootloader to the one on the Pro Micro, you will need to download and install the special software driver below. There\'s also a board definition add-on for the Arduino IDE which will add support for this board.

We\'ve updated this to the latest version of the 32U4 firmware, see the firmware note in the documents below!

**Note:** See the GitHub link below for support with the Arduino IDE.

**Features:**

* ATmega32U4 running at 8MHz
* Arduino-Compatible Bootloader
* XBee Socket
* Lithium Polymer Battery Compatible
* MCP73831T LiPo Charger
* Reset button
* On/Off Switch
* Status/Charge/RSSI LEDs

**Documents:**

* [Schematic](https://cdn.sparkfun.com/assets/9/7/7/1/6/Arduino-Fio_v31a.pdf)
* [Eagle Files](https://cdn.sparkfun.com/assets/a/0/e/4/a/Arduino-Fio_v31a.zip)
* [Hookup Guide](http://www.sparkfun.com/tutorials/338)
* [Datasheet](https://cdn.sparkfun.com/datasheets/Components/General%20IC/33244_SPCN.pdf) (MCP73831T)
* [Firmware Note](https://cdn.sparkfun.com/datasheets/Dev/Arduino/Boards/32U4Note.pdf)
* [Board Definition Files](https://github.com/sparkfun/SF32u4_boards.git)
* [Arduino Addon Files](https://github.com/sparkfun/SF32u4_boards/archive/master.zip)
* [Arduino Addon Files (IDE 1.5+)](https://github.com/sparkfun/Arduino_Boards)
* [GitHub](https://github.com/sparkfun/Fio_v3) (Design Files)

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