https://devzone.nordicsemi.com/f/nordic-q-a/58912/nrf52840-dongle-example-verification-issueHi, I am working on nRF52840 (dongle) using nRF Connect for desktop on windows 7. I was able to write the &quot;peripheral/blinky&quot; example and was able to see the output on chip with LED&#39;s blinking . I tried to check &quot;ble-peripheral/ble app blinkyen-USTelligent Community 13Tue, 10 Mar 2020 09:30:07 GMThttps://devzone.nordicsemi.com/thread/239021?ContentTypeID=1Tue, 10 Mar 2020 09:30:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3a1c28fb-71e8-4cb4-8db4-83bfcee52ffeKarl Ylvisaker<p>Hello Sasi,<br /><br />Have you seen the <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/ble_sdk_app_blinky.html">ble_blinky example documentation</a> from the SDK?<br />The documentation details how to test the functionality of the example, both using an android smartphone with the nRF Blinky app, or another ble_central unit.</p> [quote user=""]unable to see the Button and LED functioning for those examples.[/quote] <p>How did you test this? Did you have a central unit or android smartphone connected to the dongle?<br />Did you observe LED 1 turning on, after having uploaded the example to the dongle?</p> [quote user=""]I want to check the dongle Button and LED functioning. Can you please guide me in this scenario by letting me know which example should I use and how to write hex files without memory merging issue?[/quote] <p>I am not sure I have understood you correctly here - if you are asking how you can program your dongle, you can do so by uploading the precompiled hex file from the example, for example through the nRF Connect desktop application.<br /><br />Best regards,<br />Karl</p><div style="clear:both;"></div>