nrf52840 - LED 1 Not Flashing upon Startup

[ricky1413]

Hi, I'm a beginner in working with these Nordic Development Kits. I've been following the steps outlined on the Nordic website for getting started with a nRF52840 DK. It tells me that after I've connected the DK to the PC and turned it on, LED 1 should start pulsating and the other LEDs will turn on depending on which button I press. However, no LED is flashing. The website accounted for that and told me to click on a link for further instructions. However, the link takes me to the page shown below. It doesn't contain any clear instructions. So I am confused on what to do. My research tells me I need to reprogram the factory example code into the flash, but I don't know how to do that. Any help would be great. Thank you!

[Marte Myrvold]

Hi,

As you're new with Nordic DKs I would recommend taking a look at the getting started page for the nRF5 SDK, which can be found here. If you haven't downloaded the SDK yet, you can find it here.

In your case you want to run a precompiled example, the preflash example. To see how to run it, you can check out this link, and follow the guide there. You can either use the preflash example as in your picture, or another example that has a precompiled hex file. Since you have a nRF52840 DK, you should use the file that ends with pca10056_hex.

If you later want information about how to compile and run examples that are not precompiled, you can find links with guides for this on the getting started page I linked above.

Best regards,

Marte