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→Debug serial port connection instructions
=== '''How to debug the serial port''' ===
==== ''' Debug Connection instructions for debugging serial port connection instructions''' ====1)First, you need to prepare a 3USB to TTL module.3v This module can be purchased in Orange Pi's store. If there are other similar USB to TTL modulemodules, and then insert one end of the USB interface end of the USB to TTL module into the USB interface of the computer. middle
<div style="padding-left:200px">[[文件:Orange-pi-3lts-ttlmodule.png|600px]]</div>
2)The corresponding relationship between the debug serial port GND, TX TXD and RX RXD pins of the development board is shown in the figure below
<div style="padding-left:200px">[[文件:Orange-pi-3lts-ttlmodule1.png|600px]]</div>
3)The GND, TX TXD and RX RXD pins of the USB to TTL module need to be connected to the debug serial port of the development board through a Dupont DuPont cable<br>
<div style="padding-left:20px">
a. Connect the GND of the USB to TTL module to the GND of the development board<br> b. Connect the RX The RXD of the USB to TTL module is connected to the TX TXD of the development board<br> c. Connect the TX The TXD of the USB to TTL module is connected to the RX RXD of the development board
</div>
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4)The schematic diagram of connecting the USB to TTL module to the computer and the Orange Pi development board is shown below
<div style="padding-left:200px">[[文件:Orange-pi-3lts-ttlmodule2.png|600px]]</div>
=== '''How to use the debug serial port on the Ubuntu platform''' ===
1)If the USB to TTL module is connected normally, you can see the corresponding device node name under /dev of Ubuntu PC, remember this node name, you will use it when setting up the serial port software later