ncs undefined reference to `z_impl_k_busy_wait'

Hi, 

I cannot build with your project but seems you are combing DFU with peripheral_lbs. Could you try this ?

Regards,
Amanda

Hi, 

I cannot build with your project but seems you are combing DFU with peripheral_lbs. Could you try this ?

Regards,
Amanda

Hi,

thanks for reply,

if delete mcuboot, it work well.

but i'need set a key for security update.

Best regards

Hi, 

See Generating private keys and Adding a custom signature key file. There is an example in this thread. 

-Amanda