Problem is solved. I found out the port addresses Examble: https://bananapi.gitbooks.io/bpi-m64/content/en/bpi-m64gpiopindefine.html CON2-P40 = Function2: GPIO ==> PL8
L = 12.character in alphabet
( 12 - 1 ) * 32 = 352
352 + 8 = 360
echo 360 >/sys/class/gpio/export
echo out >/sys/class/gpio/gpio360/direction
echo 1 >/sys/class/gpio/gpio360/value