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→26pin UART test
<li><p>According to the schematic diagram of the 26pin interface, the available uart is uart5</p>
<p>[[File:zero3-img181.png]]</p></li>
<li><p>uart5 Uart5 is disabled by default in the Linux system, and it needs to be opened manually to use it. The steps to open are as follows:</p>
<ol style="list-style-type: lower-alpha;">
<li><p>First run '''orangepi-config''', normal users remember to add '''sudo''' permission</p>
