Disconnection issues with ble_app_hrs example from nRF5_SDK_17.1.0

[Saeid]

I am trying to implement the ble_app_hrs example from nRF5_SDK_17.1.0 and my board is nRF52840 Dongle.

After program the board, the board can advertise and I can find the DEVICE_NAME "Nordic_HRM" on mobile app, but when I try to click on the connect icon on the app, it connected for 1 sec and disconnect by itself. This the error that I got from mobile app.

Could you please advise me on this issue?

[Amanda Hsieh]

Hi, 

Are you using ble_app_hrs for the pac10059 project? Did you modify the example code? If so, what is that? 

Please provide the log on the phone from the nRFConnect app. 

I would suggest you use nRF52840DK for development because Dongle doesn't have the onboard debugger to provide debug log. 

Regards,
Amanda

[Saeid]

Dear Amanda,

Thank you for your reply and help.

Yes, I am using ble_app_hrs for the pac10059. I didn't modify the code, just compile the original one with 

Segger embedded studio and use nRF connect programmer to program the dongle.

the file path:

nRF5_SDK_17.1.0_ddde560\examples\ble_peripheral\ble_app_hrs\pca10059\s140\ses

I have purchased three unit of the dongle and I don't have access to nRF52840DK. 

Can I connect a serial-to-usb converter to the dongle to see the log ?

The below is the log of  nRFConnect app

Could you please advise me on that ?

Thanks

[Amanda Hsieh]

Hi,

Saeid said:

Can I connect a serial-to-usb converter to the dongle to see the log ?

No, it requires a debugger to provide a log.

Could you use another dongle to run the sniffer and provide the log? Here is the user guide: nRF Sniffer for Bluetooth LE. 

-Amanda

[Saeid]

Hi Amanda,

Sure, I am doing it and will keep you updated on the result.

[Saeid]

Hi Amanda,

This the log output of sniffer for the device

what is the next ? how do i know where is the issue? 

[Amanda Hsieh]

Hi,

Please upload the sniffer log (.pcapng file) which starts to log before it connects with the phone until the disconnection. 

-Amanda

[Saeid]

Could you please guide me to haw to starts  the log on sniffer ?

Can I select a specific device in sniffer to be logged?