NRF51 Dongle revert back to J-link Image which segger J-link software should be downloadhttps://devzone.nordicsemi.com/f/nordic-q-a/8915/nrf51-dongle-revert-back-to-j-link-image-which-segger-j-link-software-should-be-downloadFrom the nrf51 dongle User Guide, if revert back to the J-Link image from mbed image download the latest SEGGER J-Link software from www.segger.com and open a debug session to update to the latest J-Link OB firmware version. When I open the seggeren-USTelligent Community 13Thu, 27 Aug 2015 10:33:37 GMTRE: NRF51 Dongle revert back to J-link Image which segger J-link software should be downloadhttps://devzone.nordicsemi.com/thread/32806?ContentTypeID=1Thu, 27 Aug 2015 10:33:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:866525bf-dd6c-4c02-965f-5e6f1d7ab230Hung Bui<p>Hi wanfy,</p> <p>You should download the firmware for J-Link from our website <a href="http://www.nordicsemi.com/eng/Products/nRF51-DK">here</a> at the download tab ( nRF51-DK-J-Link-IF).</p> <p>Note that you have to enter Bootloader mode, and then drag and drop the .bin file to the Bootloader driver.</p><div style="clear:both;"></div>