I have tried it yesterday Sir and I used the gatt_server example and it worked. I was able to send data to esp32 using the android and a ble app. But the gatt_server code seems a really blurry for me because it does not have comments in its functions. I am a newbie at this I am very sorry for my inc...

Hi Sir! Do you have an example of esp32 receiving and sending data to android phone via BLE? even just a 1 and 0 data sir.