OrangePi Zero3: 26pin GPIO port test

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Chapt 3. Instructions for use of Debian/Ubuntu Server and Xfce desktop system

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Chapter 3 contents

3.18.1. 26pin GPIO port test

1) The following takes pin 7 — corresponding to GPIO as PC9 — corresponding to wPi number 2—as an example to demonstrate how to set the high and low levels of the GPIO port

Img 3.109

2) First set the GPIO port to output mode, where the third parameter requires the serial number of the wPi corresponding to the input pin

root@orangepi:~/wiringOP# gpio mode 2 out

3) Then set the GPIO port to output a low level. After setting, you can use a multimeter to measure the voltage value of the pin. If it is 0v, it means that the low level is set successfully

root@orangepi:~/wiringOP# gpio write 2 0

Use gpio readall to see that the value (V) of pin 7 has changed to 0

Img 3.110

4) Then set the GPIO port to output a high level. After setting, you can use a multimeter to measure the voltage value of the pin. If it is 3.3v, it means that the high level is set successfully.

root@orangepi:~/wiringOP# gpio write 2 1

Use gpio readall to see that the value (V) of pin 7 has changed to 1

Img 3.111

5) The setting method of other pins is similar, just modify the serial number of wPi to the corresponding serial number of the pin

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