To begin reading sensor data, you will need to install the Adafruit_EPD library (code on our github repository). It is available from the Arduino library manager so we recommend using that.
From the IDE open up the library manager...
And type in Adafruit EPD to locate the library. Click Install
Do the same to install the latest Adafruit GFX library, click Install
While we're in the Library Manager, we need to install a few more libraries. Search for and install Adafruit BusIO, Adafruit ImageReader Library, Adafruit SPIFlash, and SdFat - Adafruit Fork.
Upload the example to your Circuit Playground Express or Circuit Playground Bluefruit. You should now see a series of demos running. Note that the demos are set to pause for 15 seconds between each demo which is ok for short term usage, but it is strongly recommended to use 180 between refreshes when used over a longer period of time.