Wireless MCUのトピックRe: No Serial Output from Example Apps in Matter

No Serial Output from Example Apps in Matter

car — Thu, 24 Jul 2025 09:20:03 GMT

Hi, I’m working with the FRDM-MCXW71 board and trying to run the Matter examples based on NXP's GitHub repo, like light-switch-combo-app, Lock-app, contact-sensor-app. I've carefully followed all the setup steps from the READ.md. I have flashed the latest NBU .sb3 image to the CM3 core using blhost and .srec file to the CM33 core using J-Link. Everything including power, USB connections, serial settings are checked, they are all fine.

Despite all that, my serial monitor shows no output at all. It just sits there quietly even I pressed all the switches once. Besides, the LED 2 isn't blinking also.

To rule out hardware issues, I’ve also flashed a simple Hello World demo and LED blinky demo, and it prints correctly to serial, so UART is definitely working, LEDs are all fine also.

Has anyone run into the same issue? Any suggestions would be massively appreciated!

Thanks!

Re: No Serial Output from Example Apps in Matter

mihai_ignat — Fri, 25 Jul 2025 07:39:48 GMT

Hello.

Can you please provide a link to the exact NXP Matter Github release you are using? The default branch is release/v1.4.0. One of our latest releases is v1.4.0.2: https://github.com/NXP/matter/tree/v1.4.0.2/examples/contact-sensor-app/nxp

Can you please try with this one?

Until we can reproduce on our side, one thing you can do is try to debug the issue using VS Code. Details about how to setup the environment can be found in the release notes in the Development Tools section: https://github.com/NXP/matter/releases/tag/v1.4.0.2

BR,

Mihai

Re: No Serial Output from Example Apps in Matter

car — Tue, 29 Jul 2025 08:17:25 GMT

Thank you so much for your support! I’ve tried the latest version, and I successfully run the program on the MCXW71 board now, and everything seems to be working as expected.
In addition, I was following the example in the following links originally: https://github.com/nxp-appcodehub/ap-frdm-mcxw71-light-switch-combo-app/tree/main/examples/light-switch-combo-app/nxp/mcxw71 and https://github.com/NXP/matter/tree/release/v1.4.0/examples/light-switch-combo-app/nxp/mcxw71