https://devzone.nordicsemi.com/f/nordic-q-a/25348/thingy52-upload-sample-project-otaHi everyone, I have moved from the cable connection firmware upgrade to the OTA-DFU using the nRF52 dev kit. I am able to download the firmware from nordic&#39;s website and upload the pre-zipped file without any issue. I start seeing issues when tryingen-USTelligent Community 13Tue, 03 Oct 2017 18:18:04 GMThttps://devzone.nordicsemi.com/thread/99903?ContentTypeID=1Tue, 03 Oct 2017 18:18:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:609e18a8-fe06-4f7a-9bb6-7d451c4abff2honest_trefor<p>Thank you for the information. I would suggest making that more clear to new users of the Thingy52. I&#39;ve personally moved away from the Thingy52 for the Adafruit Feather nRF52, but I hope this information is helpful to other new users.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/99902?ContentTypeID=1Tue, 03 Oct 2017 08:41:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:450edfdf-ddf6-4c59-a778-64b3cf769bbfbjorn-spockeli<p>The <strong>Over-the-air device firmware update</strong> section in the Thingy User Guide describes how you update the application that is made by Nordic Semiconductor through the Thingy app. It does not cover how to update your own application, which requires you to compile your own bootloader. You should look at the nRF5 SDK documentation on the bootloader, see <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v14.0.0/ble_sdk_app_dfu_bootloader.html?cp=4_0_0_4_3_0">this</a> page on Infocenter.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/99900?ContentTypeID=1Thu, 28 Sep 2017 21:56:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:99da1ecf-b452-49e6-9eb1-eec291ce7065honest_trefor<p>Ah I missed that. I wonder if others have similar issues, I didn&#39;t see that step well documented in the user guide or firmware documentation. Perhaps I just missed it.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/99901?ContentTypeID=1Thu, 28 Sep 2017 14:56:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:54d7ce3c-a141-479c-9ff0-91fcbcebb214bjorn-spockeli<p>You do not have the private key which corresponds to the public key in the factory programmed bootloader on the Thingy so you will not be able to update the bootloader via OTA DFU. You need to flash the bootloader with your public key using a programmer and a cable.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/99899?ContentTypeID=1Tue, 26 Sep 2017 19:33:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d183bb3e-e055-463b-86c3-39a860ade4fehonest_trefor<p>I attempted to but ran into similar issues. I generated a public key from my private yet and placed it into the bootloader_secure project folder. I then compiled the bootloader and attempted to flash the bootloader. I was unsuccessful when creating a .zip file and attempting to flash over the air using the development kit. I was also unsuccessful when using the mobile app the pass the zip file. I have not found a good tutorial how to flash the Thingy&#39;s bootloader.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/99898?ContentTypeID=1Tue, 26 Sep 2017 09:00:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0eb7929f-6246-4b6b-a5d7-c961bf75fc2dbjorn-spockeli<p>Have you flashed a bootloader that has been compiled with your public key to your Thingy:nRF52?</p><div style="clear:both;"></div>