kerel

Hi! Most consistent interface to GPIO across different devices is probably the sysfs gpio interface (yes, deprecated, but very widely used). sinovoip published a patched fork of Wiring Pi for all their Banana Pi products: BPI-WiringPi2 (deep link to: pin mappings for the m2u). Wiring Pi is built around the sysfs gpio interface. A usage guide was published here: https://forum.banana-pi.org/t/how-to-get-working-wiringpi-on-raspbian/3696 An additional step for armbian users might be needed: https://forum.banana-pi.org/t/banana-pi-bpi-m2-ultra-m2u-wiringpi-gpio-demo/3027/10 Then, using e.g. the go-wiringpi bindings you should be able to use the M2berry GPIOs in golang. I did not try any of the steps above but hope that at least some of it will help you. Let us know of your results! Sincerely, kerel PS: New userspace applications are supposed to use the character device GPIO, see https://lloydrochester.com/post/hardware/libgpiod-intro-rpi/ Go library: https://github.com/warthog618/gpiod I can confirm that there are 288 lines exposed via this new interface: root@m2berry:~# gpiodetect gpiochip0 [1c20800.pinctrl] (288 lines) Device Tree: