How to use nrf54L15-dk with external host through hci uart application

[Abhinav152]

Hi, 

I am trying to build an application using the nrf54L15-dk board and want to use the board as a controller. I run the application on the external host but got an error as controller responsive. Can you provide the details steps so that board can be use with external host.

[Simonr]

Hi

Regarding your pin selections for UART here, the UART20 instance should only be used with GPIO port P1, so please use pins on P1 for RTS and CTS as well. Do you have some more details on what error exactly you're seeing when the controller shows as unresponsive? Another important note is that by default P1.10 on the DK. So this pin by default is likely acting as an LED that is active high. You might need to change what pin LED1 uses to avoid conflicts on your end.

Best regards,

Simon

[Abhinav152]

Hi ,
i have got pin configuration from the pin diagram.
below is the updated overlay file 

&uart20 {

current-speed = <115200>;

hw-flow-control;

status = "okay";

};

&uart20_default {

group1 {

psels = <NRF_PSEL(UART_TX, 1, 11)>,

<NRF_PSEL(UART_RTS, 0, 2)>;

};

group2 {

psels = <NRF_PSEL(UART_RX, 1, 10)>,

<NRF_PSEL(UART_CTS, 0, 3)>;

bias-pull-up;

};

};

Rx-tx for other commands is going correctly exept the Cs command  Please suggest changes to enable them

[Simonr]

Please try using pins on port P1 for CTS and RTS and see if that makes a difference. P1.12 and P1.14 for example should be usable.

Best regards,

Simon

[Abhinav152]

Hey .. my setup is updated hence facing some other issues .. but i  will try this when the build and Flash will be successfully completed.