nrf52840 DK ble_app_uart connection failure

[SHALANES]

As a beginner,I’m sorry for asking such a stupid question,but it has annoyed me for a long time.

I built and downloaded the program to my DK,and I used PuTTY to connect it,but it didn’t show up “UART started” after I resented the board.

I had changed several terminal such as CMD,nrf command line tool,Jlink and teraterm,but that didn’t work.

I wander what would the problem is , may I have the answer please.

[Simon]

I managed to make it work, I did the following:

• Connected the nRF52840 DK to the computer and turned it on
• Opened the Device Manager and found the COM port:

• Opened Putty with the settings from here: 

• Opened nRF5_SDK_17.0.2_d674dde\examples\ble_peripheral\ble_app_uart\pca10056\s140\ses\ble_app_uart_pca10056_s140.emProject and built and ran it:

• Saw "UART started" in the terminal

Best regards,

Simon

[SHALANES]

Thanks a lot,it magically works!

I think I understand why it didn't work before,I opened PuTTY after I built and ran the program.

Simple,but not for those unexperienced like me.

Thanks again for your assistance,and it's definitely worthy to wake up at midnight in Taiwan XD

appreciate,

Donald

[Simon]

I'm glad to help :) 

Yeah, then it would be too late to see the message. You could try to press the reset button as well, then I think you would see the "UART started" message again.

[SHALANES]

I did press the reset button,but it didn't work.Maybe I should check if the button is broken or something.

[Simon]

Follow the tips in the thread nRF52 DK Reset Button not working with Battery, and see if you can get the reset button to work

[SHALANES]

Thanks a lot, I'll check it up later.