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For more information please visit https://github.com/Northstrix/Electronic-Shelf-Label-Firebase-Edition
You can find the tutorial on
V2.0: https://www.instructables.com/DIY-IoT-Electronic-Shelf-Label-With-Google-Firebas-1/
V1.0: https://www.instructables.com/DIY-IoT-Electronic-Shelf-Label-With-Google-Firebas/
The desktop app is made with the help of the ChatGPT.