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Compact Datalogging Power with the Feather M0 Adalogger

The Adafruit Feather M0 Adalogger combines a fast ATSAMD21G18 ARM Cortex M0 microcontroller with a built-in microSD card holder, making it a great all-in-one board for portable data logging, sensor recording, and battery-powered projects.

It is part of Adafruit’s Feather family, so you get a thin, lightweight design with native USB, LiPo battery charging, and plenty of GPIO in a compact board that is easy to use for logging data on the go.

Important: This board uses 3.3V logic and includes a built-in microSD card slot and 100mA LiPo charger. The LiPo battery, microSD card, and USB cable are not included.

Why you'll love it

  • Built for logging: Onboard microSD card holder for easy data storage
  • Powerful Cortex M0 MCU: ATSAMD21G18 running at 48MHz
  • Portable-ready: Built-in LiPo battery charging for field projects
  • Native USB support: Easy programming and serial debugging without extra USB-to-serial hardware
  • Compact Feather form factor: Lightweight and easy to integrate into mobile builds
  • Battery monitoring: Battery voltage is connected through a divider to an analog pin for monitoring in code

What you can build

This board is ideal for environmental data loggers, portable sensor recorders, battery-powered monitoring devices, wearable logging systems, GPS data recorders, science projects, and long-running prototypes that need local storage on a microSD card.

Starter bundles

Pair it with a microSD card, 3.7V LiPo battery, micro USB cable, and a sensor module to build a ready-to-deploy portable data logger.

Recommended add-ons

Add an OLED display, GPS module, IMU sensor, or FeatherWing accessory to expand your project into a complete mobile logging system.

Technical specifications

Product Adafruit Feather M0 Adalogger
Main MCU ATSAMD21G18 ARM Cortex M0
Clock Speed 48 MHz
Logic Voltage 3.3V
Flash Memory 256 KB
RAM 32 KB
GPIO 20 GPIO pins
PWM Outputs 8
Analog Inputs 10
Analog Output 1 × 10-bit DAC
Interfaces Hardware Serial, I2C, and SPI
USB Native USB with USB bootloader and serial debugging
Storage Built-in microSD card holder
Battery Support 3.7V LiPo/Li-Ion battery connector with built-in 100mA charger
Regulator 3.3V regulator with 500mA peak current output
Extra LEDs Pin 13 red LED and pin 8 green LED
Other Features Power/enable pin, 4 mounting holes, reset button
Dimensions 22.8mm × 51.6mm × 8mm
Weight 5.3g

Pinout & power notes

The Feather M0 Adalogger gives you a strong mix of digital, analog, and communication pins in a compact layout. It supports hardware Serial, I2C, and SPI, making it easy to connect displays, sensors, radios, and storage-based projects.

You can power it from micro USB while programming, or from a 3.7V LiPo battery for portable use. When USB is connected, the board automatically switches power and recharges the battery. You can also monitor battery voltage in software through the onboard divider.

What’s in the box

1 × Adafruit Feather M0 Adalogger
Header strip included for soldering

Frequently Asked Questions

Does this include a microSD card? No. The board has a microSD card holder, but the card itself is sold separately.
Can I use this as a portable datalogger? Yes. That’s exactly what it is built for, especially when paired with a LiPo battery and microSD card.
Is it Arduino compatible? Yes. It comes with a USB bootloader and is designed for use with the Arduino IDE.
Does it have built-in battery charging? Yes. It includes a 100mA LiPo charging circuit for 3.7V LiPo/Li-Ion batteries.
Is this a 5V board? No. This board uses 3.3V logic, so connected peripherals should also be compatible with 3.3V logic levels.

Adafruit Feather M0 Adalogger

Adafruit Feather M0 Adalogger

Low stock: 1 left

Product Code

2796-A

₱ 1,453.00
₱ 1,453.00
Sale Sold out
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