Comments (3)
This can happen when onoff wants to export a GPIO to userspace but can't because the GPIO is already being used by another piece of code, perhaps in the same process, perhaps in a different process, or perhaps by the kernel. This other piece of code, wherever it happens to be, won't be using the sysfs files locates at /sys/class/gpio
to access the GPIO.
Is there another piece of code on your Raspberry Pi that is using the GPIO in question?
Or are you using a device tree overlays that is reserving the GPIO for some purpose?
Also, try the following: open a terminal window and cd to /sys/class/gpio
. If there is no directory called /sys/class/gpio/gpio<put-correct-gpio-number-here>
, run the following command:
echo put-correct-gpio-number-here > export
If an error message similar to the following is printed, something has the GPIO reserved:
-bash: echo: write error: Device or resource busy
from onoff.
@fatboy95 what's the status here?
from onoff.
It was an error in my code.. thanks for the help.
from onoff.
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from onoff.