2922 Datasheet by Adafruit Industries LLC

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Adalogge For All Fe PRODUCT ID: 2922
Adalogger FeatherWing - RTC + SD Add-on
For All Feather Boards
PRODUCT ID: 2922
https://www.adafruit.com/products/2922 2/ 29/20 1 6
-DESCRIPTION
A Feather board without ambition is a Feather board without FeatherWings! This is
the Adalogger FeatherWing: it adds both a battery-backed Real Time Clock and
micro SD card storage to any Feather main board. Using our Feather Stacking
Headers or Feather Female Headers you can connect a FeatherWing on top of your
Feather board and let the board take flight!
This FeatherWing will make it real easy to add datalogging to any of our existing
Feathers. You get both an I2C real time clock (PCF8523) with 32KHz crystal and
battery backup, and a microSD socket that connects to the SPI port pins (+ extra
pin for CS). Tested and works great with any of our Feathers, based on
ATmega32u4, ATSAMD21, or ESP8266.
We recommend the Arduino's default SD library to talk to the microSD card socket.
On ESP8266, the SD CS pin is on GPIO 15, on Atmel M0 or 32u4 it's on GPIO 10.
You can cut the trace to the default pin and change this to any pin. To use the RTC,
use our RTClib library. If you need a precision RTC, check out our DS3231
FeatherWing
Does not come with a micro SD card. A CR1220 coin cell is required to use the RTC
battery-backup capabilities! We don't include one by default, to make shipping
easier for those abroad,but we do stock them so pick one up or use any CR1220
you have handy. If you're not using the RTC part of the featherwing, a battery is not
required.
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Technical Details 50.8mm x 22 Weight: 5.19
Technical Details
50.8mm x 22.9mm x 1.6mm / 2" x 0.9" x 0.06"
Weight: 5.1g

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ADALOGGER FEATHERWING - RTC + SD