ORANGE Pi 3B - 40 Pin Interface GPIO, UART, SPI and PWM Test; 40 Pin GPIO Port Test

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3) Then connect the Type-C power supply to the board and power it on. After the system
starts, you can see the screen display as shown in the figure below
6.8. 40pin interface GPIO, UART, SPI and PWM test
6.8.1. 40pin GPIO port test
1) First click on the wiringOP icon to open the wiringOP APP
2) The main interface of wiringOP APP is displayed as shown in the figure below, and
then click the GPIO_TEST button to open the GPIO test interface