ble_nus_data_send sometimes sends errors

[roy yao]

I am using SDK16.0(ble_app_uart) program to sending dates between the phone and board.And I noticed that send function (ble_nus_data_send）failed a few times when it didn't go in.

Normal delivery process

The wrong sending process

sniffer package

Error package.pcapng

[Hung Bui]

Hi Roy, 

Seems that you created the sniffer trace from a very old Wireshark version, I couldn't open it using Wireshark v3.2.1 

Which sniffer firmware did you use ? I would suggest to use our latest sniffer v3.0.0 

In your screenshots, I can see that you were pointing to Malformed packets, could  you tell us the difference ? If it's a CRC invalid packet, it will just be ignored by the softdevice.