NCS change BLE device name during runtime

Question

Hello, 
 I'm developing an BLE application with NCS where I want to be able to change the BLE device name during runtime. Therefore I enabled CONFIG_BT_DEVICE_NAME_DYNAMIC in the prj.conf. 
 It works but I always get this warning message when I change the device name: 
 <wrn> bt_hci_core: Unable to store name 
 So I'm curious why this warning says that the name couldn't be stored but it still changes? 
 Thanks in advance.

Sigurd · Accepted Answer

Could you try to remove CONFIG_SETTINGS_NONE=y , and see if that solves the issue ? 
 db_lw said: When I understand you right, I can ignore the warning if I don't need to store the device name in the NVM? 
 Yes. 
 Here is the code-line where you get the warning: https://github.com/nrfconnect/sdk-zephyr/blob/v2.4.99-ncs1/subsys/bluetooth/host/hci_core.c#L6724 
 If removing CONFIG_SETTINGS_NONE does not work, you could try to print the error that is returned 
 change
BT_WARN("Unable to store name");

to
BT_WARN("Unable to store name: error %d",err);

Sigurd · Answer

Hmm, try 
 CONFIG_MPU_ALLOW_FLASH_WRITE=y

NCS change BLE device name during runtime

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