Zephyr buletooth sample hci_pwr_ctrl don't have debug print in nrf52840dk.

Hi,

When you use UART for HCI you cannot use the same UART for logging. So I suggest you use RTT instead by adding somethin like this to prj.conf:

# Segger RTT
CONFIG_USE_SEGGER_RTT=y
CONFIG_RTT_CONSOLE=y
CONFIG_UART_CONSOLE=n
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_BACKEND_UART=n

You could also use a second UART either for HCI or logging, but note that the onboard debugger only do USB-UART bridging for a single UART.

Thanks for your help.

Thanks for your help.