it's a smart Moral-o-mat by using ESP32-C3 based MCU and e-paper displays instead of paper.
As MCU we are using the inexpensive ESP32-C3 based board called "LuatOS CORE ESP32".
On aliexpress for around 2,30 EUR (serial chip for debugging) or around 1,70 EUR (without debugging).
LuatOS CORE ESP32 (ESP32-C3): https://de.aliexpress.com/item/1005006292473768.html
Currently there is no board variation in the espressivf32 arduino code.
Just use board = airm2m_core_esp32c3 in your platformio.ini. It has a similar pinout for SPI/I2C, builtin LEDs and buttons.
For more details: platformio.ini
To have a compact but readable version, we are using the 2.13" black/white version with SPI interface.
On aliexpress for around 7 EUR each: https://de.aliexpress.com/item/1005004644515880.html
To toggle the 3 displays, we just use the inexpensive touch button modules (TTP223).
On aliexpress for around 0,10 EUR each: https://de.aliexpress.com/item/32964219843.html
- zinggjm/GxEPD2 (drive the e-paper displays)
- lennarthennigs/Button2 (for the touch buttons)
- build class for the displays
- build class for configuration
- build class for deep-sleep handling
- add deep-sleep
- wake up MCU from deep-sleep (by all 4 buttons)
- touch button 1: toggle display 1
- touch button 2: toggle display 2
- touch button 3: toggle display 3
- button 4: activate WiFi configuration AP
- add AsyncWebserver