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Bluetooth Low Energy is the hottest new low-power, 2.4GHz spectrum wireless protocol. In particular, its the only wireless protocol that you can use with iOS without needing special certification and it's supported by all modern smart phones. This makes it excellent for use in portable projects that will make use of an iOS or Android phone or tablet. It also is supported in Mac OS X and Windows 8+.
At the Feather 32u4's heart is at ATmega32u4 clocked at 8 MHz and at 3.3V logic, a chip setup we've had tons of experience with a it's the same as the Flora. This chip has 32K of flash and 2K of RAM, with built in USB so not only does it have a USB-to-Serial program amp; debug capability built in with no need for an FTDI-like chip, it can also act like a mouse, keyboard, USB MIDI device, etc.
To make it easy to use for portable projects, we added a connector for any of our 3.7V Lithium polymer batteries and built in battery charging. You don't need a battery, it will run just fine straight from the micro USB connector. But, if you do have a battery, you can take it on the go, then plug in the USB to recharge. The Feather will automatically switch over to USB power when its available. We also tied the battery thru a divider to an analog pin, so you can measure and monitor the battery voltage to detect when you need a recharge.
Here's some handy specs! Like all Feather 32u4's you get:
Th Feather 32u4 Bluefruit LEuses the extra space left over to add our excellent Bluefruit BTLE module + two status indicator LEDs.
The Power of Bluefruit LE
The Bluefruit LE module is an nRF51822 chipset from Nordic, programmed with multi-function code that can do quite a lot! For most people, they'll be very happy to use the standard Nordic UART RX/TX connection profile. In this profile, the Bluefruit acts as a data pipe, that can 'transparently' transmit back and forth from your iOS or Android device. You can use ou iOS Appo Android App, o write your own to communicate with the UART service.
The board is capable of much more than just sending strings over the air! Thanks to an easy to lear AT command set, you have full control over how the device behaves, including the ability to define and manipulate your ow GATT Service and Characteristics, o change the way that the device advertises itself for other Bluetooth Low Energy devices to see. You can also use the AT command to query the die temperature, check the battery voltage, and more, check the connection RSSI or MAC address, and tons more. Really, way too long to list here!
Use the Bluefruit App to get your project started
Using our Bluefrui iOS Appo Android App, you can quickly get your project prototyped by using your iOS or Android phone/tablet as a controller. We have colo picker, quaternion/accelerometer/gyro/magnetometer or location (GPS), and an 8-butto control game pad. This data can be read over BLE and piped into the ATmega32u4 chip for processing amp; control
You can do a lot more too!
Comes fully assembled and tested, with a USB bootloader that lets you quickly use it with the Arduino IDE. We also toss in some header so you can solder it in and plug into a solderless breadboard Lipoly battery and MicroUSB cable not included(but we do have lots of options in the shop if you'd like!)