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→40 pin GPIO port test
=== 40 pin GPIO port test ===
{| class="wikitable" style="background-color:#ffffdc;width:800px;" |-| <big>'''The linux system released by Orange Pi has a pre-installed blink_all_gpio program, which will set all 28 GPIO ports in the 40 pins to switch between high and low levels continuously.'''
'''After running the blink_all_gpio program, when using a multimeter to measure the level of the GPIO port, you will find that the GPIO pin will switch between 0 and 3.3v continuously. Using this program we can test whether the GPIO port is working properly.'''
'''The way to run the blink_all_gpio program is as follows:'''</big>
orangepi@orangepi5plus:~$ '''sudo blink_all_gpio #Remember to add sudo permission'''
[sudo] password for orangepi: '''#A password is required here'''|}
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<span id="how-to-set-the-pull-down-resistance-of-pin-gpio-port"></span>
=== How to set the pull-down resistance of pin GPIO port ===
