nRF51822 device isn't recognized

nRF51822 device isn't recognizedhttps://devzone.nordicsemi.com/f/nordic-q-a/15783/nrf51822-device-isn-t-recognizednRF51822 and a PC were connected, nRFgoStudio was started and nRF5x Programming of a device manager was opened, the following comment comes out, and nRF51822 device can't be recognized. "No device detected,orreadback protection may be set" How shoulden-USTelligent Community 13Wed, 17 Aug 2016 07:08:12 GMTRE: nRF51822 device isn't recognizedhttps://devzone.nordicsemi.com/thread/60239?ContentTypeID=1Wed, 17 Aug 2016 07:08:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:308a614e-d762-444f-8c65-43fd29eace8eSusheel Nuguru<p>download and install nrf command line tools <a href="https://www.nordicsemi.com/eng/nordic/download_resource/33444/33/73578076">here</a>. After that connect and power your device, open command prompt and erase the chip using</p> <pre><code>nrfjprog -f nrf51 -e </code></pre> <p>That should clear the protection set in UICR register if it was set.</p><div style="clear:both;"></div>