Redirecting RTT output to UART0

Hi, 

I am testing an app using CoAP client/sever. I want to redirect the RTT log messages to UART0. I had a look at https://devzone.nordicsemi.com/f/nordic-q-a/32058/why-is-nrf_log_default_backends_init-causing-invalid_state-error-when-calling-nrf_cli_init?ReplySortBy=CreatedDate&ReplySortOrder=Ascending but I cant find sdk_config.h in my coap_server project.

How can I resolve this?
My SDK is 2.0.0.
Thanks,
Related