https://devzone.nordicsemi.com/f/nordic-q-a/34288/blinky-and-master-control-panelhi I am using nRF52 DK Loaded Blinky Peripheral I Connected this nRF DK to Com Port and Started Master Control Panel But the Start Discovery Button is Disable. Please find Screen Shoten-USTelligent Community 13Mon, 14 May 2018 08:12:29 GMThttps://devzone.nordicsemi.com/thread/131805?ContentTypeID=1Mon, 14 May 2018 08:12:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a753eed9-6dd0-4b84-9609-a45f1305e16bpriya123<p>ok Thanks</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/131798?ContentTypeID=1Mon, 14 May 2018 07:31:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fea44732-e965-41fd-8fe3-ed7d89c422d6Einar Thorsrud<p>Hi,</p> <p>I am not sure Master Control Panel works with the nRF52 DK. Please consider using <a href="https://www.nordicsemi.com/eng/Products/Bluetooth-low-energy/nRF-Connect-for-desktop">nRF Connect for desktop</a>&nbsp;instead, as Master Control Panel is legacy software that is no longer maintained. nRF Connect has support for nRF52 variants as well as nRF51. You should erase the firmware of the device (using for example &quot;nrfjprog -e&quot;) before using it with nRF Connect. You will then be prompted to install the correct firmware when you choose the DK from the serial port drop down.</p><div style="clear:both;"></div>