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Ok. I Understand. Thanks for the help. I'll let you know if I find a workaround.

Thanks for the answer. Inside the spoiler my pinmux-pins file: I have tested PC18, PC23 and PG11. PC18 and PC23 works when i echo > value 0 or 1 (0.02 Volt for 0 and 3.302 Volt for 1). PG11 do not. But in pinmux-pins file seem there are no differences between the pins: pin 82 (PC18): (MUX UNCLAIMED) 1c20800.pinctrl:82 pin 87 (PC23): (MUX UNCLAIMED) 1c20800.pinctrl:87 pin 203 (PG11): (MUX UNCLAIMED) 1c20800.pinctrl:203 Some idea?

I'm using Armbian 5.38 stable Debian stretch 4.14.14-sunxi on A20 Lime2. I try to use PGxx pins (connector GPIO-1 on board), without any luck. I know i must use formula (position of letter in alphabet - 1) * 32 + pin number, so i have tried (for PG11): echo 203 > /sys/class/gpio/export echo out > /sys/class/gpio/gpio203/direction echo 1 > /sys/class/gpio/203/value but nothing happened. I tried from 192 to 203 (PG00 to PG11), but nothing happened. On the same connector (GPIO-1), PC23, PC18 and PB23 work perfectly. What am i doing wrong?