This package offer Python classes to work with GPIO on Linux.
As this package relies on modern techniques provided by Linux kernel, so your kernel version should support at least EPoll and SysFS interfaces.
This package is based on Twisted main loop. To build the package you will also need setuptools.
- Download this repository
git clone https://github.com/derekstavis/python-sysfs-gpio.git- Inside it, issue:
sudo python setup.py install- On your code:
# Import Twisted mainloop
from twisted.internet import reactor
# Import this package objects
from sysfs.gpio import Controller, OUTPUT, INPUT, RISING
# Refer to your chip GPIO numbers and set them this way
Controller.available_pins = [1, 2, 3, 4]
# Allocate a pin as Output signal
pin = Controller.alloc_pin(1, OUTPUT)
pin.set() # Sets pin to high logic level
pin.reset() # Sets pin to low logic level
pin.read() # Reads pin logic level
# Allocate a pin as simple Input signal
pin = Controller.alloc_pin(1, INPUT)
pin.read() # Reads pin logic level
# Allocate a pin as level triggered Input signal
def pin_changed(number, state):
print("Pin '%d' changed to %d state" % (number, state))
pin = Controller.alloc_pin(1, INPUT, pin_changed, RISING)
pin.read() # Reads pin logic level- Don't forget to start reactor loop!
reactor.run()If you think that there's work that can be done to make this module better (and that's the only certainty), fork this repo, make some changes and create a pull request. I will be glad to accept it! :)