NRF5340 DK Segger J-Link RTT not showing output messages

RE: NRF5340 DK Segger J-Link RTT not showing output messages

Simonr — Mon, 20 Oct 2025 11:21:48 GMT

Glad to hear that. Can you share how you disabled the UART for future users as well or what was required for you?

Best regards,

Simon

RE: NRF5340 DK Segger J-Link RTT not showing output messages

Adolfo — Sun, 19 Oct 2025 00:36:58 GMT

I've got it to work but not this way only. I had to modify the overlay to disable UART.

RE: NRF5340 DK Segger J-Link RTT not showing output messages

Simonr — Wed, 08 Oct 2025 12:35:04 GMT

I believe you initially had a section in your main.c file where you disabled RAM blocks, which are vital to RTT logging since it uses RAM to forward the logging data. Additionally, you seem to be missing the CONFIG_LOG_BACKEND_RTT config which is necessary for enabling the RTT logging backend. See the RTT logging documentation here and refer to the Testing and optimization page for more details.

Best regards,

Simon