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3c is a hexadecimal number, it is the I2C address of OLED, if you can’t find this value, please shut down and reconnect shield and OLED, then run this command again, If you still can't find the OLED's I2C address, the OLED screen may be damaged.
'''PS''': Since the i2cdetect tool is not installed by default in pikvm os, you need to install it first. You can install it through the following command
<pre>
pikvm-update
rw
pacman -S i2c-tools -y
</pre>
4. Then run the following command to enable OLED display: