OrangePi Zero3: 26 How to set the pull-down resistance of pin GPIO port

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

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Chapter 3 contents

3.18.2. 26 How to set the pull-down resistance of pin GPIO port

1) The following takes pin 7 —the corresponding GPIO is PC9 —the corresponding wPi number is 2 — as an example to demonstrate how to set the pull-up and pull-down resistors of the GPIO port

Img 3.112

2) First, you need to set the GPIO port to the input mode, and the third parameter needs to be the serial number of the wPi corresponding to the input pin

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

3) After setting to input mode, execute the following command to set the GPIO port to pull-up mode

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

4) Then enter the following command to read the level of the GPIO port, if the level is 1, it means that the pull-up mode is set successfully


root@orangepi:~/wiringOP# gpio read 2

5) Then execute the following command to set the GPIO port to pull-down mode

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

6) Then enter the following command to read the level of the GPIO port, if the level is 0, the pull-down mode is set successfully

root@orangepi:~/wiringOP# gpio read 2

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