Why BLE disconnection occurs while sending large data?

[Mani]

Hi,

I am testing with ble_app_uart code for handling UART data. If the data is more the device is getting disconnected from the central device. I am thinking that, BLE device is getting reset when the data is more. I thought that due to excess of data there won't be a reset so I can implement logic for sending data only when device is connected. But from the observation I came to know that excess data tends to reset the nordic(nRF52 board). So data handling with the help of buffer also is not helpful in sending the data. Because buffer is cleared when the board is getting reset.

I want a solution to handle this problem, it should prevent the board reset by handling data. or after ble disconnection also data should be present in the buffer so that I can send the data without any loss.

I was keep on trying to fix this but I couldn't found the solution.

Please suggest me to do this...

[ovrebekk]

Hi Mani

Could you try the attached example?

I tried to change the buffering a bit, so that the example would not assert on a BLE buffer overflow:
nrf52-ble-app-uart-flow-control.zip

Best regards
Torbjørn

[Mani]

I have attached the video in the following link : link text

Tab 1: Data from Device under test Tab2: Receiver
Both side has nRF52 Evaluation board.

And my code is in link text

In that video you can find that there is huge loss and also board lost the connection in between the process.