BLE Sniffer dropping packets.

[Robin]

Hello Nordic World,

We are attempting to use the Nordic Sniffer app on a DK52 board to sniff and troubleshoot BLE communication issue with our board/app and iphone/app.  During sniffing we can also watch a display on the iPhone that shows a transmitted count value.  When inspecting the packets for each transmission, we find missing packets on the Wireshark display that the iPhone properly displays the count for.  Obviously the packet was sent. 

Why might this happen?  I have a suspicion that it may be dropped on the USB transaction, but have no way to confirm this.

Any help is greatly appreciated,

Thanks to all,

Robin @ TL

[Sigurd]

Robin said:

Are you in agreement with the stated case that the DK board cannot handle the requisite usb traffic? 

No. Not in your case. Your sniffer log is very different from Torsten's. The sniffer log you posted, shows 1M PHY with very little data being sent. The Segger J-link chip on the DK should be able to handle this traffic. My main hypothesis is still that the sniffer lost the packet due to 2.4 GHz noise.

[Robin]

Sigurd,

Thank you again.  FYI, I may have found a faulty USB cable connection.  Yet to verify against the sniffer, but definitely a problem cable.

Robin @ TL

[Robin]

Hello once again Sigurd,

You may close this case.  I found a faulty USB cable in my system.

Continuous Gratitude,

Robin @ TL