CC2540 USB Dongle & packet sniffer

Feras Qammou

Expert 2080 points

Other Parts Discussed in Thread: CC2540, CC2541DK-MINI

Hi,

I am using the Mini developement CC2540, I already developed an application for two devices peripheral & central, they make a connection and transfer data.

before 2 weeks I used to monitor the connection events and data transfer using the CC2540 USB dongle & packet sniffer, I was seeing the advertisement then starting connection then data transfer then empty connection events.

now I can see just advertisement and scanning till the last advertisement packet before seeing the first connection event!

means like that the sniffer stop to sniff, but in debug I see that the connection established and data transferred correctly but did not see on sniffer!

a few seconds after that I abort connection by turning of the central, I see again the advertisement packets but not the connection events!

any help please?!

Thanks.

over 11 years ago

0 Maulik Vaghela over 11 years ago

Expert 2500 points

Hi,

Bluetooth devices advertises on 1 of 3 channel. Channel 37, 38 or 39.

your device will be sniffing on one of this 3 channels only.

Thus when connection happens on any of 2 channels then your sniffer will not be able to sniff data because it doesn't know on which data channel communication is going on.

If it's possible, take 3 sniffers and scan on different channels using sniffer then you'll get data correctly.

0 Adoni Aamir over 10 years ago

Intellectual 440 points

Hi Feras Qammou,

Im currently beginner with CC2541DK-MINI. Can you share your knowledge about application built through two devices? And your struggle through CC2541DK-MINI?

Thanks

0 YiKai Chen over 10 years ago in reply to Adoni Aamir

Guru 735685 points

Hi Adoni,

You can refer to CC2540 and CC2541 Mini Development Kit User's Guide.

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CC2540 USB Dongle & packet sniffer