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→Serial Debugging Tool
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First need to prepare a USB to TTL serial cable, need to support 921600 baud rate<br>
The debugging serial port of 3G-iot IoT is serial port 1, which has been led to 40pin, and the baud rate is 921600.<br>
Connect the serial cable as shown below. The functions of the different color lines are as follows:
* Black——GND
<div>[[File:Orange-pi-3g-iot-img37.png|600px|]]</div>
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== '''Other settings''' ==
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