https://devzone.nordicsemi.com/f/nordic-q-a/42067/how-to-download-the-hex-file-without-using-keil-microvision-5-softwareSir/Madam, I am developing application software using nRF51822 in keil microvision 5 IDE. I want to know how to download the hex file without using KEIL IDE. I found the 2 ways to download the hex file to the target. 1. nRF go Studio 2. J-Linken-USTelligent Community 13Wed, 02 Jan 2019 09:59:56 GMThttps://devzone.nordicsemi.com/thread/163387?ContentTypeID=1Wed, 02 Jan 2019 09:59:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2a08dd93-ab56-4391-bd0a-1534f8b7436eMartin Lesund<p>Hi Tharunesh,</p> <p>I would recommend that you use <a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.tools%2Fdita%2Ftools%2Fnrf5x_command_line_tools%2Fnrf5x_command_line_tools_lpage.html">nrfjprog</a>&nbsp;to program your device.</p> <p>The reason you are getting unknown command is that you are using the J-Link Commander when you instead should use the standard Terminal window for you computer.</p> <p>(make sure to download the <a href="https://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF5-Command-Line-Tools/Download#infotabs">newest one</a>)</p> <p></p> <p>You could also try out the &quot;Programmer&quot; app in the <a href="https://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF-Connect-for-desktop">nRF Connect for desktop</a>&nbsp;to have the more GUI like experience.</p> <p>&quot;nrf go studio&quot; is deprecated, and the &quot;Programmer&quot; app has replaced it.</p> <p></p> <p>//Cheers</p><div style="clear:both;"></div>