nRFConnect Android app with nRF52

[Mehdi]

Hello,

I'm developing a BLE application using nRF52 based on SDK15.2 using Sofdevice S132 under Windows.

The nRF52 is used to send data in notification Format. In order to check if there is a packet loss, I'm using nRF_Connect for android (nRF Logger) to view the data received

My service supports the properties identified below : 

• read
• Write
• Write_wo_resp
• notify
• indicate

As shown in the figure below,  despite that only notification is enabled, nRFConnect identifies that an 'indication is received'.

https://devzone.nordicsemi.com/resized-image/__size/800x240/__key/communityserver-components-multipleuploadfilemanager/6d610c01_2D00_5b5c_2D00_49a9_2D00_bcd1_2D00_8826950b9bfe-26801-complete/pastedimage1546875260427v1.png

When making indication propriety as disallowed,  nRF_Connect identify that 'notification is received'.

• Is this the normal behavior?
• Can that cause packet loss, knowing that there is packets loss when making indication permitted?

Best Regards,

Mehdi.

[Hung Bui]

Hi, 

It could be a small bug in our Mobile app. Could you reattach the screenshot ?

However I don't think it can cause a packet loss. Handling of the notification/indication is done by the operating system on the phone, not the app itself. 

[Mehdi]

Hi Hung,

Please find below the attached screenshot.

Best Regards,

Mehdi.

[Mehdi]

Hi Hung,

Thank you for your quick reply.

I don't think that the operating system can cause a packet loss, In fact, No packet loss is detected when making indication propriety deactivated (using the same smartphone).

Besides, we tested with many Android smartphones (Samsung S8, A8+,S7 edge ...) and we get the same issue.

Likewise, with nRF51 we got the same issue of packets losses only with nRFconnect for android but not with nrf connect for PC.

Best Regards,

Mehdi.