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Re: sudo access, you can create a gpio group and add yourself to it:

sudo addgroup gpio

sudo usermod -a -G gpio <YOUR USER>

vi /etc/udev/rules.d/90-gpiomem.rules, add:

SUBSYSTEM=="exynos-gpiomem", GROUP="gpio", MODE="0660" `

Got this from https://wiki.odroid.com/troubleshooting/gpiomem#rootless_gpio_accessdevgpiomem

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