Orange Pi One Python GPIO (basic)

Here's how to get GPIO working in Python on the Orange Pi One.

Note. The GPIO pins on the Orange Pi One are flipped 180 degrees compared to the Orange Pi PC version or a Raspberry Pi!

check out my other Orange Pi tutorials:

https://www.instructables.com/id/Orange-Pi-One-Setup-Guide/

https://www.instructables.com/id/Orange-Pi-One-Analog-Devices-Using-MCP3008-Via-SPI/

To start you will need the python headers and library installed, if you haven't or aren't sure just type:

sudo apt-get install python-dev

Then download the pyH3 library from:

https://github.com/duxingkei33/orangepi_PC_gpio_pyH3

extract the folder and place in '/home/pi'

from the terminal go into that directory:

cd orangepi_PC_gpio_pyH3

then install it using:

python setup.py install

The library is now installed.

The way the pins are referred to are slightly different to a Raspberry Pi, they are named "ports" & "connectors".

UPDATE 03/05/2016: The new armbian images no longer export the gpios to /gpio_sw. See the above image for the port names. Image Credit: http://forum.armbian.com/index.php/topic/759-tutor...

For example pin 29 (BCM05) is port 'PA7'

To test, connect an LED to pin 29 through a 300ohm resistor then to the ground. (see diagram below)

and created a file called 'test.py':

#import the library
from pyA20.gpio import gpio
from pyA20.gpio import port
from time import sleep

#initialize the gpio module
gpio.init()

#setup the port (same as raspberry pi's gpio.setup() function)
gpio.setcfg(port.PA7, gpio.OUTPUT)

#now we do something (light up the LED)
gpio.output(port.PA7, gpio.HIGH)

#turn off the LED after 2 seconds
sleep(2)
gpio.output(port.PA7, gpio.LOW)

Dont forget to make your test file executable:

chmod +x test.py

and run as root:

sudo su
./test.py

That's the basics working, more advanced stuff like i2C should work aswell but I haven't tested.

Credit goes to: Duxingkei Chow and Stefan Mavrodiev (examples in git repository)