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Do you have to be root to use GPIO?
With these changes in place I no longer have to run as root or type ‘sudo’ before any application that accesses the pins because the alarm account is now a member of the gpio group. There may very well be an Arch Linux package that does all this for you automatically, but I haven’t found it yet.
What can I do with the RPi.gpio library?
If you are familiar with the RPi.GPIO library, you will be used to writing code which deals with pins and the state of pins. You will see from the examples in this documentation that we generally refer to things like LEDs and Buttons rather than input pins and output pins.
Which is the default PIN library for GPIO zero?
GPIO Zero was originally just a layer on top of RPi.GPIO, but we later added support for various other underlying pin libraries. RPi.GPIO is currently the default pin library used. Read more about this in Changing the pin factory. 10.1.
What’s the difference between GPIO zero and RPi.gpio?
RPi.GPIO also supports blocking edge detection. Wait for a pull-up button to be pressed in RPi.GPIO: The equivalent in GPIO Zero: Again, if the button is pulled down, the logic is reversed. Instead of waiting for a falling edge, we’re waiting for a rising edge: Again, in GPIO Zero, the only difference is in the initialization:
What do you need to know about the GPIO utility?
The gpio command is designed to be installed as a setuid program and called by a normal user without using the sudo command or logging in as root. In addition to using the gpio utility to control, read and write the GPIO pins, you can: Export/Unexport pins via the /sys/class/gpio interface,…
Which is the correct way to call the GPIO command?
Another way to call it is using the system () function in C/C++ or it’s equivalent in other programming languages. The gpio command is designed to be installed as a setuid program and called by a normal user without using the sudo command or logging in as root.
How to run a GPIO program in Debian?
Depending on what the program does, this may be enough, or it may be too simplistic. You can compile the program to say run_gpio and save it in a known path, e.g. /path/to/run_gpio. It has to be marked executable for root: Then configure Debian’s init system to start your program.