sniffer

[MK Chen]

I use Nodic sniffer nRF_Sniffer_200_beta3 to capture BLE Mesh packets, but found one strange scenario:

1 if set channel filter 37, 38, 39, can capture 3 packets in channel 37, 38 and 39 once pressed light button.

2 if set channel filter 37, can capture 3 packets also, all in channel 37, once pressed light button, as following screen shot

my question is why light profile  will change TX channel,  if changing sniffer setting?

Thanks

MK

[MK Chen]

any reply for sniffer? thanks

[David Edwin]

1. What do you mean by " if set channel filter 37", is this a setting that you do in Wireshark.
Can you clarify. (I not not see a change in the Adv Hop settings in both images)

2. I noticed that you are sniffing all packets but not packets from a specific device so be aware that packets from multiple devices will be in the sniffer trace. Is this your intention. Typically I would prefer to specify a device that is being sniffer and capture all packets from that device.

Please comment
David

[MK Chen]

Hi David,

Thanks for your reply.

yes, means setting in Wireshark.

Sorry, I have sent wrong screen shot, amend following:

I means BLE-Mesh TX channel will be affected by Wireshark.

[David Edwin]

I think we need to set the Adv Hop to  37,37,37 to set it to channel 37 

[MK Chen]

my question is BLE advertiser channels should not affect by sniffier channel setting.

sniffer can capture one packet if advertiser channel is set 37 only, but should not capture 3 packets in channel 37.