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nRF52832 DK bootloader don't start application

Hello,

I'm currently trying to OTA update the firmware of my nRF52832 DK, I use the SDK 12.3.0.

I loaded the BLE Secure DFU Bootloader in the DK, it's advertising as DfuTarg. Then I use nRF Toolbox to DFU transfer a package generated from blinky example with nrfutil.

The update works fine but once finished the bootloader don't start the blinky application, it stays in DFU mode with LEDs 1 and 3 ON.

 

What am I doing wrong ?

Thanks for your answers.

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