Error in advertising_start function in ble_app_template example

[Ananye]

Hello,

I am currently using the nrf52840, SDK 17.0.2 and segger embedded studio version V5.34. I have been working extensively with the ble_app_template in the peripheral example and added code to include custom services and characteristics.

Till yesterday my code was working fine, however today, I keep getting an error from the advertising_start function (error code 8). I am attaching the call stack and the debug terminal screenshot.

Any help on how this error can be resolved will be great. The third image shows which line creates the error in main...

[Jørgen Holmefjord]

Hi,

ble_advertising_start() will return NRF_ERROR_INVALID_STATE if the module is not initialized. Did you call ble_advertising_init() first?

Best regards,
Jørgen

[Ananye]

Hi Jorgen,

Yes I am calling ble_advertising_init() before the ble_advertising_start(). Below is a screenshot of the order I call the various Bluetooth functions. This is in the main function.

So advertising_init() calls ble_advertising_init() and then ble_advertising_start() is called in advertising_start().

Could it be something to do with the 'erase bonds'? I was experimenting with some of the buttons on my device, so I am suspecting if that may have caused this issue...

Thanks

[Jørgen Holmefjord]

Have you made sure that you did not accidentally remove ble_advertising_init() from inside advertising_init()? 

ble_advertising_start() can also return NRF_ERROR_INVALID_STATE from internal calls to sd_ble_gap_adv_set_configure() and sd_ble_gap_adv_start(), but these should not fail if this is the first call to ble_advertising_start().

If you could post the full main.c file, it would be easier to see exactly what happens.