Adafruit (PID 3403) Feather M0 Express - Designed for CircuitPython - ATSAMD21 Cortex M0

Adafruit (PID 3403) Feather M0 Express - Designed for CircuitPython - ATSAMD21 Cortex M0 is an Arduino-compatible MicroPython board suitable to develop applications of many types, including those for the Internet of Things.

Adafruit (PID 3403) Feather M0 Express - Designed for CircuitPython - ATSAMD21 Cortex M0, more information

CircuitPython is Adafruit's beginner-oriented flavor of MicroPython - and as the name hints at, its a small but full-featured version of the popular Python programming language specifically for use with circuitry and electronics.

That doesn't mean you cant also use it with Arduino IDE! At the Feather M0's heart is an ATSAMD21G18 ARM Cortex M0+ processor, clocked at 48 MHz and at 3.3V logic, the same one used in the new Arduino Zero. This chip has a whopping 256K of FLASH (8x more than the Atmega328 or 32u4) and 32K of RAM (16x as much)! This chip comes with built in USB so it has USB-to-Serial program & debug capability built in with no need for an FTDI-like chip.

Specs:

• ATSAMD21G18 @ 48MHz with 3.3V logic/power
• 256KB of FLASH + 32KB of RAM. No EEPROM
• 32.768 KHz crystal for clock generation & RTC
• 3.3V regulator with 500mA peak current output
• USB native support, comes with USB bootloader and serial port debugging
• Built in 100mA lipoly charger with charging status indicator LED
• Pin #13 red LED for general purpose blinking
• Power/enable pin
• 4 mounting holes
• Reset button

The Feather M0 Express uses the extra space left over to add a Mini NeoPixel, 2 MB SPI Flash storage and a little prototyping space. You can use the SPI Flash storage like a very tiny hard drive. When used in CircuitPython, the 2 MB flash acts as storage for all your scripts, libraries and files. When used in Arduino, you can read/write files to it, like a little datalogger or SD card, and then with our helper program, access the files over USB.