UARTs on nRF54L15 with custom PCB

RE: UARTs on nRF54L15 with custom PCB

Menon — Fri, 27 Feb 2026 10:48:41 GMT

Hello,

Glad to hear that your issue has been resolved.

Kind Regards,

Abhijith

RE: UARTs on nRF54L15 with custom PCB

jamie_wojcik — Thu, 26 Feb 2026 18:57:36 GMT

It was my hardware causing the issue. Sorry. I had a hardware analog switch that was holding the lines high. Thank you so much for your help. I learned a ton on this which is good. Thanks!

RE: UARTs on nRF54L15 with custom PCB

Menon — Thu, 26 Feb 2026 12:23:28 GMT

Hello,

You can refer to the pin planning guidelines for the nRF54L15. Based on what you have shared, it appears that you are using the correct pins, but I need to look into it in more detail to confirm.

Are there any log messages indicating an issue? You can try disabling the UART console and check the configurations below.

I also recommend referring to the UART lesson in the Academy to verify whether any required configuration may have been missed.

CONFIG_LOG=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_UART_CONSOLE=n
CONFIG_LOG_BACKEND_UART=n
#Enable the logs via RTT

Kind Regards,

Abhijith