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→40 pin I2C test
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<li><p>After starting the linux system, first confirm that there is a device node that needs to be used under the'''/dev'''</p>{| class="wikitable" style="width:800px;" |-|<p>orangepi@orangepi:~$ '''ls /dev/i2c-*'''</p>|}</li>
<li><p>Then connect a I2C device on the I2C pin corresponding to the 40 PIN interface</p></li>
<li><p>Then use the '''i2cdetect -y''' command to detect the address of the connected i2c device, which means that the i2c can be used normally</p>
