A wireless, battery-powered ePaper Display that shows you important information at a glance. Inspired by a similiar project by spritesmods.

A 7.4' ePaper Display from PervasiveDisplays is used as the display. It is powered by ESP32-C3 WiFi-enabled microcontroller. The microcontroller wakes up every 24 hours and updates the e-paper display with an 800x480 image downloaded from a server. On the server side, a Python script generates the image, showing a calendar, the weather forecast, and the next appointments.

This repository contains the hardware, firmware and software for the project.

The hardware/ folder contains all schematics and PCB layouts in KiCAD format.

• Fixed swapped USB DP+/-, USB usable again
• Fixed swapped labels USR1/USR2
• Add resistor divider for VBAT_SENSE to avoid excessive voltage on GPIO pin
• WAKEUP button changed to BOOT (connected to GPIO9)
• VBAT_SENSE moved to GPIO4 which has a usable ADC
• GPIO association of some signals changed to avoid issues strapping pins:
  • LED1 now on GPIO5
  • LED2 now on GPIO6
  • /BUSY now on GPIO7
  • /PWR_EN now on GPIO8

None

• Use bottom-connect FPC connector
• Mirror some parts of the layout

• USB DP+/- is switched
• #BUSY of Display is connected to GPIO9, which causes the chip to enter the Bootloader every time
• VBAT_SENSE is on ADC2_CH0 which is not usable when WiFi is active
• Labels USR1/USR2 are switched
• GPIO8 and GPIO2 (which are strapping pins) are used otherwise
• The WAKEUP button is useless (one can just use RESET), but a boot button would have been nice

• First revision

• Orientation/Location of ePaper FPC connector is wrong

The firmware can be found in the firmware/ folder. It is based on ESPHome.

To get started:

cd firmware/
python3 -m venv .venv
. .venv/bin/activate
pip install -r requirements.txt
cp secrets.example.yaml secrets.yaml
vim secrets.yaml
esphome compile epaperinfodisplay.yaml
esphome upload epaperinfodisplay.yaml

There is a ESPHome-compatible custom component for the e-paper display from Pervasive Displays in esphome/. This might also be useful outside this project.

The host software is writting in Python using Flask. It must run on some kind of server, like a Raspberry Pi or a NAS.

To get started:

cd software/
python3 -m venv .venv
. .venv/bin/activate
pip install -r requirements.txt
cp config.example.yaml config.yaml
vim config.yaml
flask run --host 0.0.0.0 # make accessible from outside localhost

Weather data is fetched from OpenMeteo. For this to work you need to specify your location in the config.yaml file. Calendar appointments are fetched from a CalDAV server. The example configuration contains the correct path for Baïkal, but any kind of CalDAV server should work. You might need to find out the correct path for your server.

MIT