Adafruit Feather M0 Express - Designed for CircuitPython
ATSAMD21G18 @ 48MHz with 3.3V logic/power
256KB of FLASH + 32KB of RAM
Built in USB so it has USB-to-Serial program & debug capability built in with no need for an FTDI-like chip
This is the first Feather that is specifically designed for use with CircuitPython! CircuitPython is our 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! 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. 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.
Item Specifics Fully assembled and tested 1 - small header No EEPROM 32.768 KHz crystal for clock generation & RTC 3.3V regulator with 500mA peak current output USB bootloader and serial port debugging 20 GPIO pins Hardware Serial, hardware I2C, hardware SPI support PWM outputs on all pins 6 x 12-bit analog inputs 1 x 10-bit analog ouput (DAC) 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 Size: 51.0mm x 22.8mm x 7.3mm / 2.0" x 0.9" x 0.3" Weight: 4.7g / 0.2oz Lipoly battery and USB cable not included CircuitPython does not come preloaded