Bootloader Fix for Makerdiary nrf52840 mdk USB dongle

SEGGER JLINK-OB (Of course Clone Version) is a low-cost debug probe. It can be used to program and debug the application software running on Arm Cortex Microcontrollers.

How to use

1. Connect the two boards as shown below.

2. Download the JLink Windows v7.94g program and run JFlashLite.exe from its installation path.

3. Select nRF52840_xxAA from the device section and select SWD in the interface section. Click OK and select the firmware file from the Data File (bin/hex/mot/...) section in the new window. At the end, press the Program Device key. Before starting the process, make sure that the JLINK-OB drivers are installed.

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