A version of the Electronic Shelf Label that utilizes the ESP32 CYD.
GitHub repository: https://github.com/Northstrix/ESP32-Cheap-Yellow-Display-Electronic-Shelf-Label-with-Google-Firebase
The tutorial is available at https://www.instructables.com/ESP32-CYD-ESL/
WebFlash: https://northstrix.github.io/ESP32-Cheap-Yellow-Display-Electronic-Shelf-Label-with-Google-Firebase/flash.html
Format Flash area designated for SPIFFS with ESP32 Filesystem Uploader (https://github.com/me-no-dev/arduino-esp32fs-plugin/releases/) after using the WebFlash.
The KhadashPay project is an open-source payment system.
...As for the customers of the store where the KhadashPay is deployed, Khadash pay doesn't keep any logs whatsoever and doesn't require a bit of your personal information to create an account.
You can find the tutorials here:
V2.0 (ESP32 Version): https://www.instructables.com/KhadashPay-V20/
V2.0 (Raspberry Pi Pico Version): https://www.instructables.com/KhadashPay-V20-Raspberry-Pi-Pico-Version/
V3.0 (STM32F401CCU6 Version): https://www.instructables.com/KhadashPay-V30-STM32F401CCU6-Version/
V3.0 (ESP32 Version): https://www.instructables.com/KhadashPay-V30/
V3.5 (ESP32 Version): https://www.instructables.com/KhadashPay-V35/
The version of the KhadashPay that stores the data in the cloud and allows you to operate several payment terminals is available on https://sourceforge.net/projects/khadashpay-firebase-edition/