https://devzone.nordicsemi.com/f/nordic-q-a/69012/sdk-12-bootloader-dfu-problemHi, I intend to use the DFU BOOTLOADER in my product. I’m using a PCA10040 DEV board for the tests with S132 I download the nRF SDK V17 and I compiled and I tested the “secure_bootloader” program with the “ble_app_buttonless_dfu” program, I diden-USTelligent Community 13Mon, 14 Dec 2020 08:43:07 GMThttps://devzone.nordicsemi.com/thread/284699?ContentTypeID=1Mon, 14 Dec 2020 08:43:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cac2d4b6-34c5-4a11-98d7-06f219148547carloscoelho<p>The problem was solved after update ARM Embedded to version 4.9 2015q3, Thanks.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/283091?ContentTypeID=1Thu, 03 Dec 2020 13:21:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e2a55227-ba42-4272-8a59-ea09c659ef3fEinar Thorsrud<p>Hi Carlos,</p> <p>The GNU Tools Arm Embedded version used for release testing SDK 12.x was GCC ARM Embedded 4.9 2015q3, so I recommend you use that. If you still see problems, can you test with the debug&nbsp;bootloader project with RTT logging? The log may give some useful indication of what happens.</p> <p>Einar</p><div style="clear:both;"></div>