https://devzone.nordicsemi.com/f/nordic-q-a/15992/can-the-bootloader-code-extract-application-version-number-from-the-applicationI am using an nrf51422 board. I want to update via OTA using ANT+ Dongle. The device information shown in the OTA Updater is parsed from the Bootloader Code. Is there any way that the Bootloader gets it&#39;s device information from the Application? Alsoen-USTelligent Community 13Fri, 26 Aug 2016 10:33:36 GMThttps://devzone.nordicsemi.com/thread/60998?ContentTypeID=1Fri, 26 Aug 2016 10:33:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:da07c65a-e78b-499a-adf2-6b66e9d2ce08Hung Bui<p>Hi Roshan,</p> <p>If you have a look at <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v11.0.0/ant_examples_dfu.html?cp=6_0_0_4_3_0_1_1#ant_examples_dfu_params">the documentation</a>, you can find how the application version is passed from the application to the bootloader (by writing to flash). The ota_tester project is a good source to have a look.</p> <p>I believe the information about application and bootloader both are send when the central request ANTFS_FILE_INDEX_OTA_UPDATE_INFO , handled in antfs_event_download_data_handle().</p> <p>Maybe it&#39;s just the OTA updater tool doesn&#39;t display it.</p><div style="clear:both;"></div>