After BLE_GAP_EVT_DISCONNECTED event advertisement module stops

[Ranajyoti Chakraborti]

Hi

I have written this code based on a sample from SDK12. The board is a pca10040 and nRF52832 chip. It seems like after disconnection from the master device the Softdevice is not starting the advertisement again, which according to the documentation should be the case. I have to reset the board using nrfjprog in order to start advertising again. I do not handle this even in the code and I found out that BLE_GAP_EVT_DISCONNECTED is fired by SoftDevice after disconnection. Please advise. This a show stopper.

[Edvin]

Hello,

You  need to start the advertisement somewhere in the source code after a disconnect event. 

 

In most of the examples in SDK 12 (I have checked SDK12.3.0, since you didn't specify one specific, but I assume that it is the same in the other SDK12.x.x) the ble_advertising_start(...) call is done in the on_disconnect() function, which is called in the BLE_GAP_EVT_DISCONNECTED event in in the ble_advertising_on_ble_evt(...) function inside the ble_advertising.c file.

 

Have you changed anything in this file?

 

Best regards,

Edvin

[Ranajyoti Chakraborti]

No I have not touched any library file. I took the initial code from the Heart Rate in the peripheral section of the examples and wrote custom service on top of that. I had tried adding ble_advertising_start on the handler of BLE_GAP_EVT_DISCONNECTED. There is no failure on the ble_advertising_start but the advertising does not actually start. It would only start if I reset the app with a APP_ERROR_CHECK with some error code. I also had advertising started on PM_EVT_PEERS_DELETE_SUCCEEDED, but this event is never fired. My guess is that this is for Central devices and not peripheral ones. I also checked the ble_app_hrs code again and there is no advertisement start in the BLE_GAP_EVT_DISCONNECTED  code.

[Ranajyoti Chakraborti]

I debugged through the ble_advertising code and the ble_advertising_starts returns 0

[Edvin]

I assume that you use the softdevice that comes with the SDK?

 

Is it possible to send the project? If ble_advertising_start() returns 0 and it doesn't start advertising, then it might be a softdevice bug. I would very much like to try to replicate this if possible.

 

Best regards,

Edvin

[Ranajyoti Chakraborti]

Yes I use the softdevice, it is possible to send the project, how do I send it?

[Ranajyoti Chakraborti]

Hi Edvin 

If you can kindly respond.

[Edvin]

Hello,

Sorry for the delay. You can just zip the folder containing the project. If I wanted to send the ble_app_uart example, I would zip the ble_app_uart folder, as it contains all the files that are specific for that project. Then you can upload it here (edit->insert image/video/file).

 

If you don't want the project to be publicly available, you can create a private case and upload it there. If you do that, please add a link to this case, so that the person who is assigned to the case can notify me, and I can take a look.

 

Best regards,

Edvin