https://devzone.nordicsemi.com/f/nordic-q-a/17467/what-does-dfu-remote-dfu-error-remote-dfu-operation-failed-in-nrf-toolboxI&#39;m testing with S132 nRF52 SoftDevice 3.0.0, BLE dfu operation with single, nRF toolbox on Android version 1.16.5. I have checked the example in SDK, nRF5_SDK_12.1.0_0d23e2a/examples/dfu/bootloader_secure/pca10040_debug , with public key, and useen-USTelligent Community 13Wed, 02 Nov 2016 10:02:02 GMThttps://devzone.nordicsemi.com/thread/67114?ContentTypeID=1Wed, 02 Nov 2016 10:02:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:868f5b9f-322c-4358-9b44-a39807c728f3bjorn-spockeli<p>You have to set the --hw-version to 52 so that it correspond to the chip used, i.e.</p> <pre><code>nrfutil pkg generate --hw-version 52 --sd-req 0x8C --application-version 1 --application myapp.hex --key-file private.pem apptest.zip </code></pre><div style="clear:both;"></div>