CalendarMe (WIP)

This is just a project that I created for my son. At this moment (2020) he hasn't got his own mobilephone and I want to give him the oppertunity to see upcoming appointments.

At the moment the Calendar displays todays (german: Heute) and tomorrows (german: Morgen) appointments.

If you like the project feel free to...

Parts

Adafruit TPL5110 Low Power Timer Breakout

https://www.adafruit.com/product/3435 This is a nice timer that is placed right in front of the Arduino-Board. It powers up the arduino at an interval (up to 2 hours) that can be changed by a poti. With this in place there is no need for a deep-sleep, which is - especially for the NodeMCU - to battery-consuming.

For me the TPL5110 only works with the NodeMCU by soldering a diode from GND to DONE.

Waveshare 1.54inch e-Paper Module (B)

https://www.waveshare.com/wiki/1.54inch_e-Paper_Module I bought the version with red color, but for this project there is no need for the color. My red color is so light that I doesn't want to use it. Probably that is a hardware-defect. If you have the BW-Version you have to use another constructor for it in the Code.

NodeMCU Lua Amica ESP8266

https://www.az-delivery.de/en/products/nodemcu

TP4056 USB Lithium Li-Ion Battery Charger Module

Lipo charger. The one I used in fritzing has separated pins for battery and output - mine has no separated pins.

3,7 V 1000 mAh Lipo

Lipo for powering

Configure

Google-Calendar

1. Create unter http://script.google.com/ a new app with the code from google-calendar-script.gs.
2. Replace the calendar-id inside the script
3. Deploy app with Publish > Deploy as web app (Access: Anyone, even anonymous)
4. If you update always choose under Project version "New"
5. Copy the Script-Id inside the Web app URL -> you will need this in the credentials.h in the arduino-code

Arduino-Code

1. Fill in the values in credentials.h
2. Verify connection-settings at main.cpp-> // E-Paper + NodeMCU
3. Use the correct constructor for your display (e.g. if it is not a colored display use another than GxEPD2_3C)
4. Upload to Arduino

Connect

I had some problems to get the right GPIO-Setup for the TPL5110 and e-Paper Module. Especially the DONE-Pin on the TPL only works on some GPIOs and the RST-Pin on the e-paper does not fit to every NodeMCU-pin. I think this is because the NodeMCU has a HIGH-status on some pins while powering up.

3D-printed case

https://www.thingiverse.com/thing:4483551