https://devzone.nordicsemi.com/f/nordic-q-a/63283/thing-91-is-not-detected-by-nerf-connect-programmer-app-when-connected-via-usbIt continue to give &quot;No device available&quot; when I connected thingy 91 to the nerf connect programmer app. I tried turning on device while keeping SW3 pushed but still not detected the device. Not sure what to do. Also, I don&#39;t see any file with PCA20035en-USTelligent Community 13Mon, 13 Jul 2020 09:26:23 GMThttps://devzone.nordicsemi.com/thread/259649?ContentTypeID=1Mon, 13 Jul 2020 09:26:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:603773c4-ef37-47ae-b9a4-7642e7a8ba55Hakon<p>Hello,</p> <p>&nbsp;</p> [quote user=""]It continue to give &quot;No device available&quot; when I connected thingy 91 to the nerf connect programmer app.[/quote] <p>&nbsp;I assume you&#39;re talking about the nRF connect programmer. Have you flashed MCUboot on the thingy:91? If not, you can use the debugger on a nrf9160 dk to program the thingy:91 according to <a href="https://infocenter.nordicsemi.com/topic/ug_nc_programmer/UG/nrf_connect_programmer/ncp_pgm_thingy91_debugprobe.html">this document</a>.</p> <p>&nbsp;</p> [quote user=""]Also, I don&#39;t see any file with PCA20035 board in the zephyr board files.[/quote] <p>&nbsp;It is located in the nrf directory, not the zephyr directory. </p> <p>nrf/boards/arm/<span></span><strong>thingy91_nrf9160</strong></p><div style="clear:both;"></div>