NFC and FOTA does not work

[Marelcom]

Hi

SDK: nRF Connect v2.6.1
uP: nRF52832

In my project I try to compbine NFC and FOTA (DFU over BLE). First I did setup a NFC project from the example "writable_ndef_msg". This is running. Then I did setup a demo project based on that example: https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-bootloaders-and-dfu-fota/

But after combining those two example project, FOTA does not run. In the "Device Manager" App on my mobile phone I received a "GATT CONN TIMEOUT" error, after starting a firmware upgrade. To speed up the start time, CONFIG_BOOT_VALIDATE_SLOT0=n is set to no in child_image/mcuboot.conf

I think I missed to set a configuration in the prj.conf file but I have no idea what could be wrong.

Further could that be a problem that NFC is allowed to write to the flash?

CONFIG_MPU_ALLOW_FLASH_WRITE=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_NVS=y

Attached you find my project.

Thanks and best regards
Markus

[Menon]

Hello,

I tried initializing BLE first, then NFC, and it's working on my side. I have also changed a few config values, but I guess the issue is with the initialization. Please take a closer look and optimize the config values accordingly

Case_339301.zip

Kind Regards,

Abhijith 

[Marelcom]

Hi Abhijith

thanks a lot for your enhanced demo code.

Finaly i found the issue.
In the main loop the k_sleep was missing. In my demo I did not add a sleep into the mainloop. 

	while (true) {
        k_sleep(K_MSEC(10));
	}

After adding k_sleep FOTA is working as expected. I guess bluetooth process did not get any run time while in main loop no sleep instruction is added.

Demo is running with default stack size.

Thanks a lot for your help

best regards
Markus