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:Open STM32CubeProgrammer and switch to UART mode in the top right corner of the tool. Choose the COM port of your device and click "Connect". The tool should show the memory content of the device. Go to the "Open file" tab and load the firmware binary. Click the "Download" in the top right corner of the memory view window. The tool will show a dialog once the transfer is complete. Disconnect from the device. Now power cycle the device and recheck the device output with Realterm.
''' Troubleshooting '''
:If the whole process does not work or STM32CubeProgrammer does not want to connect to the device, please close all applications, power cycle the device and start over. Connection issue may occur if the COM port wasn't correctly opened or closed by one of the applications during the flash process.
