Orange Pi R1 Plus - 13 pin Interface GPIO, I2 C, UART Test; 13 pin GPIO Port Test

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5.18. 13pin interface GPIO, I2C, UART test
wiringOP has been adapted to the Orange Pi R1 Plus development board, using
wiringOP can test the functions of GPIO, I2C and UART
5.18.1. 13pin GPIO port test
1) Below, take pin 5-corresponding to GPIO as GPIO3_A4--corresponding to wPi serial
number as 2-as an example to demonstrate how to set the high and low levels of the
GPIO port
2) First set the GPIO port to output mode, and the third parameter needs to input the
serial number of the wPi corresponding to the pin
root@orangepir1plus:~/wiringOP# gpio mode 2 out
Use gpio readall to see that the mode of pin 5 has changed to out