Adafruit Feather M0 Bluefruit LE

<p>Key Features:</p><ul> <li>Adafruit Feather M0 with a BTLE module</li> <li>ATSAMD21G18 ARM Cortex M0 processor(clocked at 48 MHz and at 3.3V logic, same one in the new Arduino Zero</li> <li>256K of FLASH (8x more than the Atmega328 or 32u4) and 32K of RAM (16x as much)</li> <li>Built in USB so it has USB-to-Serial program &amp; debug capability built in with no need for an FTDI-like chip</li></ul><p>This is the Adafruit Feather M0 Bluefruit LE - an 'all-in-one' Arduino-compatible + Bluetooth Low Energy with built in USB and battery charging. Bluetooth Low Energy is a hot, low-power, 2.4GHz spectrum wireless protocol. In particular, it's 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+.<br><br>To make it easy to use for portable projects, 3.7V Lithium polymer battery connector and built in battery charging means 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.</p><p>Item Specifics<br>No EEPROM<br>3.3V regulator with 500mA peak current output<br>USB bootloader and serial port debugging<br> 20 GPIO pins<br>Hardware Serial, hardware I2C, hardware SPI support<br>8 x PWM pins<br>10 x analog inputs<br>1 x analog output<br>Built in 100mA lipoly charger with charging status indicator LED<br>Pin #13 red LED (general purpose blinking)<br>Power/enable pin<br>4 mounting holes<br>Reset button<br>Size: 2" x 0.9" x 0.28<br>Weight: 5.7g</p>

• Adafruit Feather M0 with a BTLE module
• ATSAMD21G18 ARM Cortex M0 processor(clocked at 48 MHz and at 3.3V logic, same one in the new Arduino Zero
• 256K of FLASH (8x more than the Atmega328 or 32u4) and 32K of RAM (16x as much)
• Built in USB so it has USB-to-Serial program & debug capability built in with no need for an FTDI-like chip