UART Configuration on nrf9160

RE: UART Configuration on nrf9160

CWallach — Tue, 25 Feb 2020 00:06:32 GMT

Which version of the SDK are you using? Maybe try the at_client sample project.

In your example the char 'B' is continually written by the nrf52840. Maybe reverse the direction. When bringing up UART communication, I typically setup up a 1 second timer in order to write a single char to the UART once every second. Transmitting is simpler than receiving.

In your picture it looks like a nRF9160 dev board is being used which has a USB serial port interface. I'd connect that to a PC and run a serial terminal program such as TeraTerm (be sure to configure the baud rate). The dev board shows up as 3 COM ports on the PC. I forgot which one to select so try them all and see if chars are received. Oh, use UART0 when talking to the PC.

RE: UART Configuration on nrf9160

CNONE — Mon, 24 Feb 2020 17:26:07 GMT

Still, I couldn't achieve it. Do you have any suggestion about how I can test UART communication on nrf52840 or nrf9160? I just need simple example for UART communication.

RE: UART Configuration on nrf9160

CWallach — Fri, 21 Feb 2020 21:20:11 GMT

Try adding the following to the prj.conf file:

CONFIG_AT_HOST_LIBRARY=n
CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_UART_2_NRF_UARTE=y
CONFIG_UART_2_NRF_TX_BUFFER_SIZE=32

Changes to configuration files, such as the .overlay or prj.conf, do not take affect until the following:

Close the project

Exit Segger

delete the build directory (build_nrf9160_pca10090ns)

Run Segger and do file --> open nRF Connect SDK project.

Wait for indexing to complete.

Then clean and build.