This tutorial explains how to use Bluetooth Low Energy (BLE) with the ESP32. In Part 1 first some BLE basics are discussed and then focuses on the BLE Server.

Link for the pre-defined Services, Characteristics and Descriptors:
[ Ссылка ]

Link for UUID generation:
[ Ссылка ]

Code:
[ Ссылка ]

Correction:
05:13 the "ESP32 BLE" library is included in the latest releases of the ESP32 compiler and you dont need to add an extra library. To check if the library is included go to File - Examples and search for "ESP32 BLE Arduino". If these examples are present, the library is installed.
05:28 correction, the real author is Neil Kolban, but it might show up under Dariusz Krempa. Anyway, on new installations the library is included per default and you do not need to install anymore.
09:50 delay(3) will provide a 3ms delay, not 3ns as I state in the video.

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