https://devzone.nordicsemi.com/f/nordic-q-a/9018/nrf52-gcc-dfu-bootloader-not-flashingHi All, I&#39;ve happily done all this work before on the Nrf51822 with boot loaders and apps and a happily deployed product. Thought it was time to shift over to GCC on my Mac and kick Keil to the curb and also update our product to new chippy. en-USTelligent Community 13Wed, 02 Sep 2015 07:30:18 GMThttps://devzone.nordicsemi.com/thread/33227?ContentTypeID=1Wed, 02 Sep 2015 07:30:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b32a53f7-3221-4928-b138-6da5746426f5RK<p>No problem - I just uploaded version 1.0.12 to sourceforge, that has a radio button for selecting the device you&#39;re using so that should now work for everyone.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/33226?ContentTypeID=1Wed, 02 Sep 2015 05:42:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e03a7e05-19c3-4dd7-9ed9-e8fdf9eee8a4Chris<p>After talking with RK who built the great tool he helped me track down the issue which was that it was defaulting to nRF51822 in the generated scripts causing issues with it flashing the boot loader.</p> <p>After a quick patch from him we tested a new version of this tool and it works perfectly!</p> <p>I imagine this version will be available shortly to the public and will include the ability to select from the two devices.</p> <p>Thanks again Roland, great help and a real life saver.</p><div style="clear:both;"></div>