RTT logging for Matter device

[Tony]

We have been developing a Matter device for Smartthings using a nRF 5340 dev kit. We are using the VSCode and extensions from Nordic for this project.

On the dev kit we are able to directly connect to the log output using the 2 exposed UART devices that are available over the USB connection.

Now we have our actual board that only has J-Tag and are using a SEGGER J-Link debugger.

VSCode now just shows the device for programming and an RTT device. The RTT device allows me to connect to it, but I never see any of the debug output.

My question is how do I redirect the logging that was going to the UART of the dev kit to the J-Link RTT connection so I can continue to develop and see my log output?

[Maria Gilje]

Hello,

My question is how do I redirect the logging that was going to the UART of the dev kit to the J-Link RTT connection so I can continue to develop and see my log output?

Add the following lines to your prj.conf:

CONFIG_USE_SEGGER_RTT=y
CONFIG_RTT_CONSOLE=y
CONFIG_UART_CONSOLE=n

This was found in the How to use RTT part of Testing and debugging an application of the NCS documentation. Follow the links to the documentation to learn more about logging in NCS.

Best regards,

Maria

[Tony]

Thank you. I will try this out.

I knew I had seen it somewhere, but wasn't able to find it for some reason when I searched.

The Matter documentation is so much sometimes it is hard to find stuff unless you know just where to look.

Thank you for the links.