esp32-blufi - This component provides bluetooth onboarding for the ESP32 boards.

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This component provides bluetooth onboarding for the ESP32 boards. It uses bluetooth to delivery the wifi configuration to the device. On top of the existing blufi example in esp-idf it uses Non-Volatile Storage (NVS) to save the credentials and disables the onboarding interface after rebooting, which means it is "closer" to a real demonstration and can be used "as is" in prototypes. As I understand it it uses Diffie–Hellman key exchange (DH) in conjunction with AES to exchange the wifi information over a GATT connection.

https://github.com/wolfeidau/esp32-blufi

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