https://devzone.nordicsemi.com/f/nordic-q-a/14493/how-to-upload-bootloader-and-program-hex-file-to-nrf51822-on-pcbHi, I am attempting to make a PCB for NRF51822 and I was wondering how I would upload a bootloader to the chip? I can&#39;t seem to find it. The device in the end will be using the S130 softdevice. Also, say I were to compile code on the NRF51-dk withen-USTelligent Community 13Wed, 15 Jun 2016 09:42:55 GMThttps://devzone.nordicsemi.com/thread/55321?ContentTypeID=1Wed, 15 Jun 2016 09:42:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4ca723f6-0552-49de-ab7f-bbfcf1c9ab90Stefan Birnir Sverrisson<p>Hi</p> <p>The difference between nRF51822 and nRF51422 is explained on <a href="https://devzone.nordicsemi.com/question/30569/moving-from-nrf51822-to-nrf51422/?answer=30636#post-id-30636">this thread</a>.</p> <p>You can find precompiled bootloader on this path in nRF5 SDK 11.0.0:</p> <p>\nRF5_SDK_11.0.0_89a8197\examples\dfu\ble_dfu_send_hex\test_images_update_nrf51\dfu_test_bootloader_b_s130.hex.</p> <p>SDK 11.0.0 can be found on <a href="http://developer.nordicsemi.com/">developer.nordicsemi.com/</a></p> <p>The bootloader project is on this path:</p> <p>\nRF5_SDK_11.0.0_89a8197\examples\dfu\bootloader\pca10028\</p> <p>PCA10028 contains an nRF51422 chip.</p> <p>Here is also a <a href="https://devzone.nordicsemi.com/tutorials/9/">bootloader tutorial</a>, just ignore the &quot;packs&quot; section because we do not support packs anymore.</p><div style="clear:both;"></div>