Door access QR-code E-paper
Description
Because I've bought e-paper for many years, I still don't know how to use it. Until a few days ago, when I found it, it still showed the old message that I had tried for a long time(5 year). So I came up with the idea of this project. https://www.youtube.com/watch?v=TqnO3P3RRHQ&t=3s
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