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→Debug serial port connection instructions
<li><p>The corresponding relationship between the GND, TX and RX pins of the debugging serial port of the development board is shown in the figure below</p>
<p>[[File:zero2w-img61.png]]</p>
{| class="wikitable" style="background-color:#ffffdc;width:800px;" |-| <big><p>'''Note: The pin header on the 40pin interface is not soldered by default, and you need to solder it yourself before it can be used.'''</p></big>|}</li>
<li><p>The GND, TX and RX pins of the USB to TTL module need to be connected to the debugging serial port of the development board through Dupont lines.</p>
<ol style="list-style-type: lower-alpha;">
<li><p>Connect the GND of the USB to TTL module to the GND of the > development board</p></li><li><p>'''<span style="color:#FF0000">Connect the RX of the USB to TTL module to the TX of the > development board</span>'''</p></li><li><p>'''<span style="color:#FF0000">Connect the TX of the USB to TTL module to the RX of the > development board</span>'''</p></li></ol>
</li>
<li><p>The schematic diagram of connecting the USB to TTL module to the computer and Orange Pi development board is as shown below</p>
<p>[[File:zero2w-img62.png]]</p>
{| class="wikitable" style="background-color:#ffffdc;width:800px;" |-| <big><p>'''The TX and RX of the serial port need to be cross-connected. If you don't want to carefully distinguish the order of TX and RX, you can casually connect the TX and RX of the serial port first. If there is no output from the test serial port, then exchange the order of TX and RX, so that the There is a right order.'''</p></big>|}</li></ol>
<span id="how-to-use-the-debugging-serial-port-on-ubuntu-platform"></span>
=== How to use the debugging serial port on Ubuntu platform ===