CC2541 BLE stack advertising issues

lakshmikanth satyavolu

Hello All,

I am using heartrate application profile on my custom design board. I found my device is not being discovered all the time with BLE multitool app on my iPhone. Sometimes app is showing it as broadcaster and no further data exchange happens. Sometimes app not even discover the device.

Out of 10 attempts, 3 time multitool shows broadcaster, and 1 time it doesn't even find the device.

I found using the sniffer, my device sometimes not advertising data more than two ADV_IND packets where I assume it supposed to send the packets forever till it is discovered by central.

I tried by modifying advertising data flags for limited discover and general discover modes. it doesn't show any difference.

I also found after, gapRole_state flag set to GAPROLE_ADVERTISING, the device never gets any events and will be waiting in sleep mode forever.

As I am new to the BLE app development, I stuck in debugging, and unable to find what could be the problem.

Anyone please help me on this issue.

Regards

Lakshmikanth

over 10 years ago

0 YiKai Chen over 10 years ago

Guru 735685 points

I would suggest you to do test on your customized PCB using SmartRF Studio (www.ti.com/.../smartrftm-studio&DCMP=hpa_rf_general&HQS=Other+OT+smartrfstudio).

0 JXS over 10 years ago

TI__Guru** 105180 points

Hi,

If you are only seeing a couple of Adv packets, then likely there is something wrong with your board, such a a crystal or layout issue. Can you post your schematics? Also, I suggest getting your SW working on the TI reference HW, such as CC2541EM, to eliminate any variables with your code.

Best wishes

0 lakshmikanth satyavolu over 10 years ago in reply to YiKai Chen

Expert 1680 points

Hi YiKai,

I have only one unit of CC debugger, So able to configure either TX or RX. Is there any way to connect my boards to smartRF other than CCdebugger? My custom board doesn't have any USB interface.

Regards

Lakshmikanth

0 lakshmikanth satyavolu over 10 years ago in reply to JXS

Expert 1680 points

Hello JXS,

I did observe out of 10 attempts.. boards are getting connected to app 6 times. 4 times the above said problem occurs.
Do you think still it is a layout issue?

I will check with keyfob and update.

Thanks for your response.

Regards
Lakshmikanth

0 YiKai Chen over 10 years ago in reply to lakshmikanth satyavolu

Guru 735685 points

I am afraid that there is no better solution than CC debugger.

0 lakshmikanth satyavolu over 10 years ago in reply to JXS

Expert 1680 points

Hi JXS,

Can you please share your E-mail address? so that I can send our product schematics.
The 32.768 kHz crystal we are using is Citizen #CFS-206.CFS-145.CFV-206 (shelfkey.com/.../4113019.pdf) for your Information.

Regards
Lakshmikanth

0 lakshmikanth satyavolu over 10 years ago in reply to JXS

Expert 1680 points

Hi JXS,

It is a priority task I need to look into. Any help will accelerate our development.
Can you please share your E-mail ID to send you our product schematics for review?

Regards
Lakshmikanth

0 Dhaval V over 10 years ago in reply to lakshmikanth satyavolu

Genius 4470 points

Hi,

Please make sure you are not doing any longer duration activity within 'GAPROLE_ADVERTISING' case of peripheralStateNotificationCB() callback function. This might hamper the advertising.

Thanks,

Dhaval

0 lakshmikanth satyavolu over 10 years ago in reply to Dhaval V

Expert 1680 points

Hi Dhaval,

Thanks for your prompt response.

I am using heartrate application as is, and not added any overhead to the callback. The same code is working on keyfob without any issues.

Regards
Lakshmikanth

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CC2541 BLE stack advertising issues