ESP32 over BLE

[Swagger]

Hi iam working on an OTA over BLE through ESP32.

I just need some guidance on how i should create the characteristics.

Should i go for characteristics without response and app will completely send the data without any ack.

Or is better to get an ack to confirm that the file has reached in the esp32 and then send the rest.

Or is there any better way to do this.