RE: Why am I receiving data through /dev/ttyACM1 while transmitting over pin 8 (UART1 TX) on nRF9151?

jarain78 — Wed, 09 Apr 2025 16:27:52 GMT

Hi Hakon, thank you very much for your help.

Indeed, UART0 was already showing as disabled. I’m not sure if this is the best solution, but I managed to fix the issue and it works!

I found out that button_1 and the RX pin (P0.09) share the same physical pin. In the visual configuration of the .overlay file, the RX pin had the lightning symbol (activation) set to high, while button_1 was set to low.

So what I did was invert the RX activation, matching it to button_1… and that’s when it started receiving data correctly! 🎉

Thanks again for your support — really appreciate it!

Best regards,

RE: Why am I receiving data through /dev/ttyACM1 while transmitting over pin 8 (UART1 TX) on nRF9151?

Hakon — Wed, 09 Apr 2025 12:48:54 GMT

Hello,

did you check in zephyr.dts and .config that UART0 has been disabled in the build?