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→Debug serial port connection instructions
3)The GND, TXD and RXD pins of the USB to TTL module need to be connected to the debug serial port of the development board through a DuPont cable<br>
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a.Connect the GND of the USB to TTL module to the GND of the development board<br>b.The Connect the RXD of the USB to TTL module is connected to the TXD of the development board <br>c.The Connect the TXD of the USB to TTL module is connected to the RXD of the development board
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