The Feather boards in M0 series are designed around powerful ATSAMD21G18 ARM Cortex M0 processor clocked at 48 MHz and at 3.3V logic – same as Arduino Zero. The M0 boards are great alternative to 32u4 boards when you require power packed processor.
Features Bluefruit LE as on-board Bluetooth module configured with multi-function code. It can transparently transmit back and forth from Bluetooth enabled smart device. You can utilise Adafruit’s App for both iOs and Android or write your own to talk to UART device.
The Adafruit Feather family are lightweight boards and designed to be a new standard for portable microcontroller cores. The Feather boards have built in USB so it is capable for USB-to-Serial program and debug without dedicated FTDI like chip. One of the great feature of Feather boards is built in battery charging and a connector for 3.7V LiPoly batteries.
Buy Feather M0 Bluefruit LE from Pakronics: