This project is an actual credit-card-sized ESP32-C3 computer with an e-ink display and NFC. Built as a tiny tinkering demo, ideas include a smart home dashboard, 2FA, or an NFC ticket wallet. Now: ...
Credit card chips have been in modern cards for a while now, and are a security feature used for authentication, as Mastercard ditched the magnetic stripe completely years ago. But to make it all work ...
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