nrf sniffer only showing [Malformed Packets]; not detecting the BLE packets ?

[HSA]

Hi~

I am struggling to get the BLE packets detected by nrf sniffer (v1.0.1) using wire shark. Its only showing "ADV_IND[Malformed Packet]" periodically. I didn't understand this why it is happening. Also Its not detecting any of the "connected" state of device.

1. nrf sniffer command window: Display device name
2. selected particular device to sniff using arrow key
3. wire shark(v1.12.6) ON; I can only see ADV_IND info, nothing else.
4. In parallel, open nrf master control; connect device, discover services, enable services; All working well in master control but I can not see any alert notification in wireshark ( packet sniffing)

Please suggest the solution~ Thanks

[Håkon Alseth]

Hi,

Is the sniffer placed within range of the central and peripheral? Ideally you want to place it in between the peripheral and central so that it can sniff all communication with a high S/N ratio.

You can see the signal strength by reading the RSSI of packets. A reading of -75 and lower is not ideal when doing a sniffer trace.

Note: a malformed packet now-and-then is to be expected, as this is radio-communication and the sniffer is a passive eavesdropping device.

Cheers, Håkon

[HSA]

Hi Hakon,

Thanks for your well explanation. I had followed the same before.

well, after spending enough time to check the cause of error.....I resolve it finally. I didn't know the cause of this issue but I simply changed the COM PORT of sniffer board and evaluation board (sniffer and nrf51822) [before also there wasn't any error regarding com port or anything else except receving MALFORMED PACKETS in sniffer log]; after doing this I re-start all....like flash the code, start sniffering.....working well so far.

still I didn't know the cause, if some body knows please update here.

Thanks

/Ash

[HSA]

well, after spending enough time to check the cause of error.....I resolve it finally. I didn't know the cause of this issue but I simply changed the COM PORT of sniffer board and evaluation board (sniffer and nrf51822) [before also there wasn't any error regarding com port or anything else except receving MALFORMED PACKETS in sniffer log]; after doing this I re-start all....like flash the code, start sniffering.....working well so far.

still I didn't know the cause, if some body knows please update here.

Thanks

/Ash