GPIO LED blinker using SYSFS on the Rock64

[ulysse132]

Hello,

I have issue when trying the code MarkHaysHarris gave :

Code:

ulysse132@rock64:~$ sudo -i
[sudo] password for ulysse132:

root@rock64:~# echo 101 > /sys/class/gpio/export
-bash: echo: write error: Invalid argument
root@rock64:~#

Could you give me a hand to make this work ? I have the same result with echo 60. I didn't try other values because I don't want to make mistakes.

I use armbian 5.42 (stretch).

Thanks for your help !