nrf52 unable to enable notifications on the client side ( CCCD not discovered )

[David]

We have a custom board based on the nrf52, We trying to integrate BLE functionality into our already existing firmware. I am able to create a custom service and characteristic but I have not been able to enable notificatons using nrfConnect. The button for doing that is disabled and I get "cccd not discovered when I mouse over it". I have also tried the lightBlueOs app so it is safe to say that the problem is not with the app. I am using the same exact program from this tutorial: 

https://github.com/bjornspockeli/nRF52-Bluetooth-Course

I am using the same SDK and everything is the same as the tutorial instructed. But I still get this error. I have also tried creating other tutorials like this: https://devzone.nordicsemi.com/tutorials/b/bluetooth-low-energy/posts/ble-characteristics-a-beginners-tutorial

But they all give me the same problem. The only change I am making to the tutorial sample code is that I am disabling the peer manager initialization. Because initializing it returns an error which I traced back to fds_init(), NRF_ERROR_STORAGE_FULL. I read that the peer manager handles security and bonding, so my assumption is that disabling it shouldn't affect the firmware. Please, I would like to know if anyone has encountered similar problems or if anyone has any suggestions. They will be deeply appreciated. Thanks.

[Kenneth]

Very odd, the permissions seems to be set to BLE_GAP_CONN_SEC_MODE_SET_OPEN(), so no security should be needed.

Have you tried some of the SDK examples, such as:
\nRF5_SDK_15.2.0_9412b96\examples\ble_peripheral\ble_app_blinky

The documentation can be found:
http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.2.0/ble_sdk_app_blinky.html?cp=4_0_0_4_1_2_3 

Best regards,
Kenneth

[David]

Yes, Kenneth, I have tried the blinky example, displays the ble device but I don't think it has notifications built in. Could this have something to do with the peer manager that I disabled?

[Kenneth]

You can see that blinky example does not use peer manager, yet it is using notifications. From the ble_lbs_init() in ble_lbs.c:

[David]

Yes, I see. Do you have any other insights kenneth? What could cause a problem like this?

[Kenneth]

Check the value handle when initialise the characteristic vs. the BLE_GATTS_EVT_WRITE event when the peer write to the individual value handles to enable the cccd's?

Best regards,
Kenneth

[David]

Can you explain more kenneth, I dont fully understand

[Kenneth]

When calling characterisic_add() you get the handle for the specific characteristic you just initialized, every time the peer write to a characteristic you will be notified with a BLE_GATTS_EVT_WRITE event and the handle it write to. Maybe you can output to UART.