adding buttonless dfu service to heart rate service example application

[srinivasa m]

Hello Everyone,

   I used the HRS application example for LESC secure communication and added the OTA to the HRS application. After adding that, the device restarts. I debugged, and the following error is arising.

<error> app: ERROR 8 [NRF_ERROR_INVALID_STATE] at C:\nRF_SDK\nRF5_SDK_17.1.0_ddde560\nRF5_SDK_17.1.0_ddde560\examples\ble_peripheral\ble_app_hrs_LESC_BEACON_V2\main.c:598
PC at: 0x0002CDA3
<error> app: End of error report

this error is arising when this function is called in the service_init() function.

 err_code = ble_dfu_buttonless_init(&dfus_init);
APP_ERROR_CHECK(err_code); 

kindly help me on this issue. I have used nrf_sdk_17.1.0 and Segger embedded studio v5.68. I followed the tutorials https://novelbits.io/nrf52-ota-dfu-ble-part-4/ and nordic official tutorial.

Best Regards,

Srinivasa

[Vidar Berg]

Hello Srinivasa,

I don't see anything inside ble_dfu_buttonless_init() that may cause the function to return with NRF_ERROR_INVALID_STATE. Could you upload your project so I can try to debug it here?

Best regards,

Vidar

[srinivasa m]

Hi Vidar,

Thanks for your response, I have attached the project file. kindly review the code and waiting for the quick replay. 

Best regards,

Srinivasable_app_hrs_LESC_BEACON_V2.zip

[Vidar Berg]

Hi Srinivasa,

It does not make sense that the error arises after the connection has been established. Please upload your current application project, along with the bootloader project you are using, so I can review the configuration. You can zip and upload the entire SDK if that is easier.

Regards,

Vidar

[srinivasa m]

Hi Vidar,

I will attach both files. kindly check and let me know0383.secure_bootloader.zipble_app_hrs_LESC_BEACON_problem_with_bonding.zip

[Vidar Berg]

Hi,

I see you've increased the number of FDS pages from 3 to 4 in your app, but you haven't reserved this extra flash page in your bootloader (see NRF_DFU_APP_DATA_AREA_SIZE). This is an issue because it allows the bootloader to overwrite and potentially corrupt one of your FDS pages during a DFU.

[srinivasa m]

Hi, do I need to change the  NRF_DFU_APP_DATA_AREA_SIZE to the new value? I think this area size multiples of flash page size

[Vidar Berg]

NRF_DFU_APP_DATA_AREA_SIZE must be set equal to (FDS_VIRTUAL_PAGES+FDS_VIRTUAL_PAGES_RESERVED) * 4096.