NRF9160 DK UART fustration!!!

RE: NRF9160 DK UART fustration!!!

Achim Kraus — Thu, 18 Apr 2024 05:33:58 GMT

Thank sounds pretty strange. In my experience both SPI and UART works well.

E.g. SPI is used for the external flash on the DK. And the predefined UARTS are connected to the USB bridge. I use both without that issues.

Which version of the nRF9160-DK are you using (it's printed on the back)?

> UART_RX_STOPPED

I guess, you redefined the UART or do you use the standard mapping to the USB bridge?

If you use your own mapping, such "RX_STOPPED" may be caused by a "break" on RX (that's a long "low" signal). So, did you check your wiring?

> "we are in a hurry"

I guess I don't need to paste endless hackneyed saying, that this is mostly the cause of such evil things.

RE: NRF9160 DK UART fustration!!!

Celso Prieto — Wed, 17 Apr 2024 14:26:07 GMT

Hello

nrf Connect SDK is 2.6.0.

I think our main problem is to understand how can we implement external devices into nrf9160DK board, as it looks following the steps on your official guides are not enough to have external devices connected.

As i said , we we follow your guide to connect external MCU there is something missing.

What we want to achieve at this stage is basically send AT commands from STM32 through UART2, what are the steps on nrf9160DK to achieve that?

we are feeling nrf9160DK is not well documented or too many samples to be a product to use in our deployments.

Regarding SPI, we wanted to implement a basic W5500 ethernet , but was impossible to have SPI working, while we did same on STM32 or ESP32 with succedd.

RE: NRF9160 DK UART fustration!!!

Øyvind — Wed, 17 Apr 2024 08:55:57 GMT

Hello,

sorry to hear about your struggle with our nRF9160DK and the Serial LTE Modem application.

What version of the nRF Connect SDK are you running? Could you also elaborate more on what exactly you are trying to achieve in your setup? i.e. are you sending sensor data from STM32 MCU via the nRF9160 to a cloud solution? What exactly are you trying to use SPI for?

Thanks.

Kind regards,
Øyvind

RE: NRF9160 DK UART fustration!!!

Celso Prieto — Tue, 16 Apr 2024 14:21:20 GMT

when VDD selected to 3V following debug message

SEGGER J-Link V7.94e - Real time terminal output
SEGGER J-Link (unknown) V1.0, SN=960003718
Process: JLink.exe
[00:00:00.253,936] <wrn> spi_nor: Waiting until flash is ready

application not working.