Serial port only works when debugging

[keith v]

Custom app running on a nRF52 devboard. Serial port runs when I use the debugger and continues after I exit the debugger, but does not run from a cold start.

using the Nordic UART FIFO code. NRF_LOG_USES_UART=1 and DEBUG are defined in the C preprocessor settings

flow control disabled

Any ideas? Thanks

[FormerMember]

Which version of the SDK do you use? Do you see the same problem if you run one of our examples in the SDK?