How to configue an external UART from nRF9160 dk ?

[Zita25]

Hi,

I use the app "asset-tracker", and i would like to configure an external uart to connect a sensor to the board.

I modifed the code but i can't detect any new COM from the device manager.

Here, what i made like modification :

in the nrf9160dk_nrf9160ns.dts file :

in the main.c file :

I think the problem comes from the file prj.conf, all modifications i made in it, crash the app ... so i don't know what to add ...

I hope someone can help me

Best Regards

Zita

[Simonr]

Hi Zita

For most of the nRF91 applications, the default software settings for UART0 and UART1 are that they are routed to VCOM0 and VCOM2 respectively. UART0 is the "primary" UART where you get the console data as well as data from the AT host library, while UART1 can be used for modem tracing when you have enabled the BSD_LIBRARY_TRACE_ENABLED configuration.

Please check whether this configuration is enabled in your application or whether UART1 is used for something else. Please also try adding CONFIG_UART_1_NRF_UARTE=y to prj.conf as well.

Best regards,

Simon

[Zita25]

So in my project BSD_LIBRARy_TRACE_ENABLED is not enabled and i have add CONFIG_UART_1_NRF_UARTE=y  in mt prj.conf but it crashes when i restart the app.

Thanks

Best Regards

Zita

[Simonr]

Hi

How exactly does the application crash? Are you able to see any error codes what so ever while debugging? A note to the COM port. The nRF91DK should always show two COM ports in the device manager, and you shouldn't see a "new" COM port popping up. It will always be present, even though the firmware doesn't use it.

Best regards,

Simon

[Zita25]

It crash when I reload the app, i have this message erreur : " create_nordic_project.py failed ". I'm confuse because i always had three ports.

Best regards,

Zita

[Simonr]

Hi

Yes, there are in total three COM ports from the nRF9160 DK, but only two of these (VCOM0 and VCOM2) are connected to the nRF9160 chip, sorry about the confusion. For details on routing VCOM0 and VCOM2, please see the nRF9160 DK board control on page 19 of the nRF9160 DK user guide.

As for the create_nordic_project.py failed error you are seeing, this is occurring when trying to set up a project in SES, correct? Can you show me a screenshot of the nRF Connect Options window before you press OK and this error occurs?

Best regards,

Simon