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→26pin UART test
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<li><p>Then start to test the uart5 interface, first use the DuPont line to short the rx and tx of the uart5 interface to be tested</p></li></ol>
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| style="text-align: left;"| Corresponding to pin 10 of 26pin
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<li><p>Use the '''gpio''' command in wiringOP to test the loopback function of the serial port as shown below. If you can see the following print, it means that the serial port communication is normal</p>