Now able to send data from ESP32 to Android app #3
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With the repo you were not able to send data from ESP32 to Android App, due to a permission issue in the BLE descriptor.
I fixed following this SOF https://stackoverflow.com/questions/27068673/subscribe-to-a-ble-gatt-notification-android
As you can see in the image attached now you can notify the client from the server (e.g. ESP32 -> Android)