Adafruit Feather M0 Adalogger

Adafruit Feather M0 Adalogger is an all-in-one Cortex M0 data logger with a MicroSD holder for read/write storage. The data logger features an ATSAMD21G18 ARM Cortex M0 processor, clocked at 48MHz and at 3.3V logic. The chip offers 256K of flash and 32K of RAM. The built-in USB provides a USB-to-Serial program and debug capability.

To support portable projects, the board includes a connector for Adafruit 3.7V lithium polymer batteries and built-in battery charging.


  • Measures 2.0" x 0.9" x 0.28" (51mm x 23mm x 8mm) without headers soldered in
  • Weight 5.3 grams
  • ATSAMD21G18 @ 48MHz with 3.3V logic/power
  • 256KB of FLASH + 32KB of RAM
  • 3.3V regulator with 500mA peak current output
  • USB native support comes with a USB bootloader and serial port debugging
  • 20 GPIO pins
  • Hardware Serial, hardware I²C, hardware SPI support
  • 8 PWM pins
  • 10 analog inputs
  • 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

Feather M0 Adalogger

Adafruit Feather M0 Adalogger
Published: 2016-12-15 | Updated: 2022-03-11