RPi.GPIO input problem

Hi I have got the gpio inputs and outputs working using the echo commands in Linux but when I try the RPi.GPIO module with Python as detailed on the Python website pypi.python I can work the ouput ok but am not able to read the inputs. When I enter the " input_value = GPIO.input(7) " line nothing happens. Has anyone made this work? If so I would appreciate some help. Thanks

Former Member over 13 years ago

Howdy,

What do you mean nothing happens?

The statement:

>>> input_value = GPIO.input(7)

Sets the variable "input_value" to True or False depending on whether there is voltage on the input pin (assuming you've set it up correctly). There will be no text returned when you do this. You can see the value with:

>>> print input_value

This will print the Boolean value (True or False), which you can use to control the logic of your Python program.
Cancel
Vote Up +1 Vote Down

Sign in to reply

Cancel
wallarug over 13 years ago in reply to Former Member

watch this: http://www.raspberrypi.org/archives/1417

I found this very helpful when first using RPi.GPIO.
Cancel
Vote Up +1 Vote Down

Sign in to reply

Cancel
cityswift over 13 years ago in reply to wallarug

Thanks for your replies - problem sorted - I am new to Python and the syntax is a little confusing - I was using = where it should have been ==!
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel