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EnterDownloadMode.md

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  1. Connect the board to the computer USB
  2. Press and hold the BOOT button!!! Don't let go!!!, the position of the BOOT button is different for each board, check the pin diagram
  3. Press the RST (reset button), then release the RST button, and finally release the BOOT button
  4. Check whether there is a port in the computer device manager

Most people do not follow the steps to write, for beginners, please try this process at least 3 times, please make sure each step is correct

If none of the above can be successfully written into the firmware, then it can be judged that there is a problem with the board.