Polar H10(peripheral) do not immediately disconnect from NRF52(both central and peripheral) after removing from the chest.

[Sami Ul Haq]

Hello Team,

I am using the ble_app_hrs_rscs_relay example where NRF52 acts both as a central and peripheral. My question is that when I remove the heart sensor Polar H10( which is a peripheral) from the chest, it doesn't disconnect from NRF52 immediately after removing it from the chest but it takes a longer time to disconnect. I want that when I remove Polar H10 from the chest and it disconnects Immdeditaly. Any help regarding this will be highly appreciated.

I am using NRF52 and SDK 17.0.2 and soft devices s140.

Kind Regards,

Sami Ul Haq

[Sami Ul Haq]

Thank you Karl Sir,

Karl Ylvisaker said:

You can download the nRF Sniffer tool from here and read about how to install and use it here

I am going through these links and will be back if I didn't understand something. 

Regards,

Sami Ul Haq

[Sami Ul Haq]

Hello, again Karl sir,

Karl Ylvisaker said:

When you have the sniffer tool up and running you can monitor the on-air BLE transmissions, so that you can see whether or not the peripheral just stops sending (turns off)

I have gone through the process of the nRF Snipper tool and I have tested the Polar H10 by capturing its packet in Wireshark and came to the conclusion that the Polar H10 does not stop advertising upon the removal but take some time and then the advertising stopped after some time. What will be the possible solution in this case?

Regards,

Sami

[Karl Ylvisaker]

Hello again, Sami

I am glad to hear that you have familiarized with the sniffer tool and have been able to use it, great!
This is a powerful tool to wield when developing BLE application.

Sami Ul Haq said:

came to the conclusion that the Polar H10 does not stop advertising upon the removal but take some time and then the advertising stopped after some time. What will be the possible solution in this case?

Then this becomes much harder. Do I understand it correctly that you have no way to reprogram the H10 sensor? If so, you will need to figure out an event on the central side to terminate the connection, and this event should only ever happen when the sensor is removed.
Perhaps there is a drop in the data sent when the sensor is removed, could you perhaps apply a filter to this?

Best regards,
Karl