OLED Display

[Puneet Chandiok]

I 've connected my OLED as:

Onion Expansion Pin OLED Pin

3.3V <-> 3.3V
GND <-> GND
20 <-> SCL
21 <-> SDA

Now how can I write text or display pic on the OLED either by using I2C / GPIO.

Please suggest.

Thanks in advance.

Puneet Chandiok