Adafruit Feather 32u4 Adalogger
Adafruit Feather 32u4 Adalogger combines USB, battery charging, and a built-in microSD cardholder, making it an easy, portable solution for Arduino-based data logging projects.
Feather is Adafruit’s lightweight, portable development board family—thin, compact, and designed to power projects you can take anywhere. Built to be a new standard for mobile microcontroller platforms, Feather combines USB connectivity, battery support, and a consistent form factor across the range.
The Adafruit Feather 32u4 Adalogger is Adafruit’s take on an all-in-one datalogger (or data reader). It’s based on the Feather 32u4 and adds a built-in microSD cardholder, making it ready for logging sensor data or reading files straight out of the box.
At its core is the ATmega32u4, running at 8 MHz with 3.3 V logic—the same proven setup used on the Adafruit Flora. The chip provides 32 KB of flash and 2 KB of RAM, along with native USB support. This means no external USB-to-serial chip is needed, and the board can also act as a USB HID device, such as a mouse, keyboard, or USB MIDI controller.
Designed with portability in mind, the Feather 32u4 Adalogger includes a JST connector for 3.7 V lithium polymer batteries and onboard battery charging. It can run directly from the micro USB connector, from a battery, or automatically switch between the two when USB power is available. The battery voltage is routed through a resistor divider to an analogue pin, allowing you to monitor battery levels and know when it’s time to recharge.
The extra board space is used to add data-logging essentials:
- MicroSD cardholder for reading or writing large amounts of data
- Green LED on pin #8 for status indication or simple debugging
The board ships fully assembled and tested, with a USB bootloader pre-installed for quick use with the Arduino IDE. Header pins are included but not soldered. LiPo battery, microSD card, breadboard, JST cable and USB cable are not included.
Features
- ATmega32u4 @ 8MHz with 3.3V logic/power
- 3.3V regulator with 500mA peak current output
- USB native support, comes with USB bootloader and serial port debugging
- You also get tons of pins - 20 GPIO pins
- Hardware Serial, hardware I2C, hardware SPI support
- 7 x PWM pins
- 10 x analogue 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
Specifications
- Measures 51mm x 23mm x 8mm - without headers
- Weight - 5.1 grams
Revision History
- As of July 26, 2023 – We've updated this PCB with Adafruit Pinguin to make a lovely and legible silkscreen - you may get the new PCB or the older version with vector fonts - both are identical other than the fancy silkscreen.
Resources
Package Contents
- 1x Adafruit Feather 32u4 Adalogger
- 2x 16-pin headers
Original: $16.90
-65%$16.90
$5.91Product Information
Product Information
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Description
Adafruit Feather 32u4 Adalogger combines USB, battery charging, and a built-in microSD cardholder, making it an easy, portable solution for Arduino-based data logging projects.
Feather is Adafruit’s lightweight, portable development board family—thin, compact, and designed to power projects you can take anywhere. Built to be a new standard for mobile microcontroller platforms, Feather combines USB connectivity, battery support, and a consistent form factor across the range.
The Adafruit Feather 32u4 Adalogger is Adafruit’s take on an all-in-one datalogger (or data reader). It’s based on the Feather 32u4 and adds a built-in microSD cardholder, making it ready for logging sensor data or reading files straight out of the box.
At its core is the ATmega32u4, running at 8 MHz with 3.3 V logic—the same proven setup used on the Adafruit Flora. The chip provides 32 KB of flash and 2 KB of RAM, along with native USB support. This means no external USB-to-serial chip is needed, and the board can also act as a USB HID device, such as a mouse, keyboard, or USB MIDI controller.
Designed with portability in mind, the Feather 32u4 Adalogger includes a JST connector for 3.7 V lithium polymer batteries and onboard battery charging. It can run directly from the micro USB connector, from a battery, or automatically switch between the two when USB power is available. The battery voltage is routed through a resistor divider to an analogue pin, allowing you to monitor battery levels and know when it’s time to recharge.
The extra board space is used to add data-logging essentials:
- MicroSD cardholder for reading or writing large amounts of data
- Green LED on pin #8 for status indication or simple debugging
The board ships fully assembled and tested, with a USB bootloader pre-installed for quick use with the Arduino IDE. Header pins are included but not soldered. LiPo battery, microSD card, breadboard, JST cable and USB cable are not included.
Features
- ATmega32u4 @ 8MHz with 3.3V logic/power
- 3.3V regulator with 500mA peak current output
- USB native support, comes with USB bootloader and serial port debugging
- You also get tons of pins - 20 GPIO pins
- Hardware Serial, hardware I2C, hardware SPI support
- 7 x PWM pins
- 10 x analogue 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
Specifications
- Measures 51mm x 23mm x 8mm - without headers
- Weight - 5.1 grams
Revision History
- As of July 26, 2023 – We've updated this PCB with Adafruit Pinguin to make a lovely and legible silkscreen - you may get the new PCB or the older version with vector fonts - both are identical other than the fancy silkscreen.
Resources
Package Contents
- 1x Adafruit Feather 32u4 Adalogger
- 2x 16-pin headers
