SimpleGPIO provides a cross-platform, easy to use GPIO library. It does not provide all the low-level features of the low level GPIO interface, but it is sufficient for interfacing with the vast majority of simple devices.
>>> import simplegpio >>> button = simplegpio.Input('a1', simplegpio.PULLUP) >>> button.read() True >>> led = simplegpio.Output('a2') >>> led.on()
To initialize a pin, you must call the constructor for an input or output:
o = simplegpio.Output(portpin) i = simplegpio.Input(portpin, type)
This routine will set up the selected GPIO subsystem, set the correct pin type and return a SimpleGPIO object. ‘portpin’ is a two-character string naming the desired device, such as ‘a1’ or ‘d6’. (Lower-case letters should be used.)
When defining an input, ‘type’ must be simplegpio.INPUT for a floating input, simplegpio.PULLUP for a weak pull-up and simplegpio.PULLDOWN for a weak pull-down. These pull-up/pull-down modes are appropriate for mechanical switches.
Input SimpleGPIO objects have one method:
This method returns True if the pin is at a logical 1 and False if the pin is at a logical 0.
Output SimpleGPIO objects have three methods:
o.on() o.off() o.write(value)
Here, value can be any type. If value evaluates to True (typically the integer 1 or the boolean True), the pin will be driven high. If value is False, it will be driven low.