4 Replies Latest reply on Nov 14, 2019 6:12 AM by AnjanaM_61

Problem: CYW920719Q40EVB-01 observe mode?

MiLe_4471161 Nov 7, 2019 9:05 PM

I set the module to the observe mode and receive the contents of the packet on the BLE.
However, the number of data collected is very different from the current number of BLE.

In fact, there may be 1000 BLE packets in 10 seconds, but my UART only shows 5~6 packets.
Does anyone know how this is going to happen?

Is there a filter function in the API that isolates some of the packets?
The picture is that I use the APP on my mobile phone to retrieve it.

The sending period of the BLE device is about 100ms, but I don't seem to receive the content.

I platform is WICED_STUDIO 6.4.

The attachment is my project file.

MightRx.zip 8.5 K

1. Re: Problem: CYW920719Q40EVB-01 observe mode?

AnjanaM_61 Nov 9, 2019 10:24 AM (in response to MiLe_4471161)

Hello Might Lee,

I couldn't find any problem in your code.
When I tested , I was able to see it printing the advertising devices.
Do you mean you are not able to see all the BLE devices around?
Can you please double check ? Please send the logs which you are getting on your side.

Regards,
Anjana
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2. Re: Problem: CYW920719Q40EVB-01 observe mode?

MiLe_4471161 Nov 13, 2019 4:29 AM (in response to AnjanaM_61)
Hi AnjanaM_61,

My log file is in the attachment.
I grab a BLE message to describe.
This is repeated for 98 ms to send a message on the red arrow point.
But in my log file, the density received is very different.

I want to receive all the BLE message to print out.

Best Regards,
Might

20191111_1247.TXT.zip 479 bytes
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3. Re: Problem: CYW920719Q40EVB-01 observe mode?

MiLe_4471161 Nov 14, 2019 5:05 AM (in response to MiLe_4471161)

I think I find the problem.
In wiced_bt_cfg.c the low_duty_scan_interval is too large and the low_duty_scan_window too small, resulting in insufficient scanning time, so I missed a lot of packets.
After I adjusted it, everything was as I expected.
Thanks AnjanaM_61.

Best Regards,
Might
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4. Re: Problem: CYW920719Q40EVB-01 observe mode?

AnjanaM_61 Nov 14, 2019 6:12 AM (in response to MiLe_4471161)

Hi Might,

Forgot to ask you to check that. Yes, scan interval & window settings may effect the devices reported.
For full time scanning , you can keep Scant interval & window as same.

Thanks for confirming the fix.

Regards,
Anjana
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