Thanks for the clear example.

Is there a reason I can't access pins 15-17 (extension board RGB led)?
I can update the values using (b)ash fast-gpio commands

root@Omega1:~# ls /sys/class/gpio/
export gpio1 gpio13 gpio18 gpio23 gpio6 gpio8 unexport gpio0 gpio12 gpio14 gpio19 gpio26 gpio7 gpiochip0

@Boken-Lin is theree some package (apart python-light) that needs to be installed in order to sue the ptyhon oled code?

When I try to use it I just get error message that sais

Traceback (most recent call last):
  File "oled.py", line 1, in <module>
    from onion import I2C
ImportError: No module named onion

Thanks for the clear example.

Is there a reason I can't access pins 15-17 (extension board RGB led)?
I can update the values using (b)ash fast-gpio commands

root@Omega1:~# ls /sys/class/gpio/
export gpio1 gpio13 gpio18 gpio23 gpio6 gpio8 unexport gpio0 gpio12 gpio14 gpio19 gpio26 gpio7 gpiochip0