This post is older than 2 years and might not be relevant anymore
More Info: Consider searching for newer posts

nRF Sniffer wireshark bad interval connection

Hi all,

I'm using nRF Sniffer (2.0.0-1.beta), i didn't have any problem for follow connection between master and slave but now, I have a problem with time displayed in wireshark. My interval connection max is 20ms (central).

I can find in connect_req link layer data Interval 16 (20ms) => OK

After Wireshark shows that :

REF Master Slave LE LL 26 Empty PDU

0.000360 Slave Master LE LL 26 Empty PDU

0.000616 Master Slave LE LL 26 Empty PDU

0.000946 Slave Master LE LL 26 Empty PDU

0.001291 Master Slave LE LL 26 Empty PDU

0.001633 Slave Master LE LL 26 Empty PDU

0.102369 Master Slave LE LL 26 Empty PDU

0.102698 Slave Master LE LL 26 Empty PDU

etc....

Can someone explain to me what's wrong ?

Thanks in advance

Best regards,

MPS

Parents
  • ok, since multiple roles are in the central I think the connection events are being skipped so that it can scan for other devices and occassionally the scanner need to use the radio. This is confirmed by the fact that there is no packet loss (as the SN, NESN are in sync). I think the sniffer is capturing exactly as it happens.

    Edit: The event counter is used to see the time line, so even if a event occured and a tx did not happen on the master side, the counter has to be incremented. This is generated by the sniffer and is not on the air.

Reply
  • ok, since multiple roles are in the central I think the connection events are being skipped so that it can scan for other devices and occassionally the scanner need to use the radio. This is confirmed by the fact that there is no packet loss (as the SN, NESN are in sync). I think the sniffer is capturing exactly as it happens.

    Edit: The event counter is used to see the time line, so even if a event occured and a tx did not happen on the master side, the counter has to be incremented. This is generated by the sniffer and is not on the air.

Children
No Data
Related