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→Onboard LED light test instructions
# There are two LED lights on the development board, one green light and one red light. The default display of the LED lights when the system is started is as follows:
::{| class="wikitable" style="width:800px;text-align: center;"
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::{| class="wikitable" style="background-color:#ffffdc;width:800px;" |-| <big>'''The green light on the development board can be controlled through software. The red light will be on continuously after power is turned on and cannot be controlled through software.'''
'''When you get the development board, you may find that even if the TF card with the system burned is not inserted into the development board, the green light will flash after connecting the power supply to the development board. This is because the 16MB SPI Flash on the development board is factory default. A miniature Linux system will be burned. This system will set the green light to flash after entering the kernel.'''
'''If the Linux system in the SPI Flash is cleared, then without inserting the TF card with the system programmed in it, you will only see a steady red light on the development board after turning on the power.'''</big>|}
<ol start="2" style="list-style-type: decimal;">
<li><p>The method of setting the green light to turn on and off and flash is as follows:</p>
{| class="wikitable" style="background-color:#ffffdc;width:800px;" |-| <big><p>'''Note that the following operations should be performed under the root user.'''</p></big>|}
<ol style="list-style-type: lower-alpha;">
<li><p>First enter the setting directory of the green light</p>
{| class="wikitable" style="width:800px;" |-| <p>root@orangepi:~# '''cd /sys/class/leds/green_led'''</p>|}</li><li><p>The command to set the green light to stop flashing is as > follows:</p>{| class="wikitable" style="width:800px;" |-| <p>root@orangepi:/sys/class/leds/green_led# '''echo none > trigger'''</p>|}</li>
<li><p>The command to set the green light to be always on is as > follows:</p>
{| class="wikitable" style="width:800px;" |-| <p>root@orangepi:/sys/class/leds/green_led# '''echo default-on > trigger'''</p>|}</li>
<li><p>The command to set the green light flashing is as follows:</p>
{| class="wikitable" style="width:800px;" |-| <p>root@orangepi:/sys/class/leds/green_led# '''echo heartbeat > trigger'''</p>|}</li></ol>
</li>
<li><p>If you do not need the LED light to flash after powering on, you can use the following method to turn off the green light flashing</p>
<ol style="list-style-type: lower-alpha;">
<li><p>First run '''orangepi-config'''. Ordinary users remember to add > '''sudo''' permissions.</p>{| class="wikitable" style="width:800px;" |-| <p>orangepi@orangepi:~$ '''sudo orangepi-config'''</p>|}</li>
<li><p>Then select '''System'''</p>
<p>[[File:zero2w-img80.png]]</p></li>
<li><p>Then select '''Hardware'''</p>
<p>[[File:zero2w-img81.png]]</p></li>
<li><p>Then use the keyboard's arrow keys to locate the position shown > in the picture below, and then use the space to select > '''disable-leds'''</p>
<p>[[File:zero2w-img82.png]]</p></li>
<li><p>Then select '''<Save>'''to save</p>
<li><p>Then select '''<Back>'''</p>
<p>[[File:zero2w-img84.png]]</p></li>
<li><p>Then select '''<Reboot>''' to restart the system to make the > configuration take effect.</p>
<p>[[File:zero2w-img85.png]]</p></li>
<li><p>After restarting and entering the system, you can see that the > green LED light on the development board will no longer light > up.</p></li></ol>
</li></ol>
<span id="operation-instructions-for-rootfs-partition-capacity-of-linux-system-in-tf-card"></span>
== Operation instructions for rootfs partition capacity of Linux system in TF card ==