Overview

Build this calendar display using the Adafruit Metro M4 Express Airlift and the Tri-Color ePaper Shield.

A wonderful thing happened when the Metro M4 Express Airlift was released. It opened Arduino sketches to the Internet, freeing them from the confines of their closed environment. It is now officially a "thing" in a world of the Internet of Things (IoT).  For this project, the sketch utilizes the built-in Airlift coprocessor board of the Metro M4 Express Airlift to grab the current date and time from Adafruit.io. No Real Time Clock (RTC) is needed here, since Adafruit.io will happily give us the current date and time, and in our local timezone too. 

The Adafruit Tri-Color ePaper Shield used with this project is a 2.7" ePaper shield that displays black, white and red pixels. It easily connects to the Metro with no soldering needed since the headers are already assembled on both the Metro and the ePaper shield. The sketch displays the current month using the date and time pulled from Adafruit.io. The ePaper display keeps its display even when power is removed. Once a monthly calendar is displayed, you could unplug it and the display will continue to show the calendar.

Parts

Building this project requires no soldering and uses just two parts: the Adafruit Metro M4 Express AirLift Lite and the Adafruit 2.7" Tri-Color eInk / ePaper Shield with SRAM.  To make this project portable, you could add a USB battery pack or the Adafruit PowerBoost 500 Shield and a Li-Po battery and insert it between the Metro and the ePaper shield.

If you are interested in ePaper displays for other projects, check out the entire line of Adafruit's ePaper displays.

Adafruit Metro M4 Express AirLift (WiFi) - Lite

PRODUCT ID: 4000
Give your next project a lift with AirLift - our witty name for the ESP32 co-processor that graces this Metro M4. You already know about the Adafruit Metro...
$34.95
OUT OF STOCK

Adafruit 2.7" Tri-Color eInk / ePaper Shield with SRAM

PRODUCT ID: 4229
Easy e-paper finally comes to microcontrollers, with this breakout that's designed to make it a breeze to add a tri-color eInk display. Chances are you've seen one of those...
$39.95
IN STOCK

USB cable - USB A to Micro-B

PRODUCT ID: 592
This here is your standard A to micro-B USB cable, for USB 1.1 or 2.0. Perfect for connecting a PC to your Metro, Feather, Raspberry Pi or other dev-board or...
$2.95
IN STOCK
This guide was first published on May 11, 2019. It was last updated on May 11, 2019. This page (Overview) was last updated on May 23, 2019.