Remove power, then hold down the user button (closest to the outside of the board) while reapplying power.

关断电源，在重新供电时按下用户按钮(离板的外边缘最近的按钮)。

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Remove power, then hold down the user button (closest to the outside of the board) while reapplying power.

关断电源，在重新供电时按下用户按钮(离板的外边缘最近的按钮)。

youdao