Scrambled display - wiring, software, or hardware defect?

Question

I've got the ESP8266 OLED starter kit with the 0.96" screen and it works great!

I puchased a 1.3" screen to make it a bit easier to read.

The included .96 Screen had VCC GND SCL SDA

The new screen has  VDD GND SCK SDA

Connected to the same code, I get some of the image, but most of the screen is scrambled:

Does anyone know if this is a sign of miswiring (Maybe I need a pull up resistor?)

Or is a sign that I need to change the driver or it's configuration (maybe SCL != SCK)

Or could it be a bad display?

Thanks!

- Jack

Answer 1

Hi Jack

The scrambled screen indeed indicates that you are using the same driver for the bigger screen as you used for the 0.96". The 1.3" most certainly has a SH1106 chip so you should use this driver:
https://github.com/squix78/esp8266-oled-ssd1306/blob/master/SH1106Wire.h

Have a look at this section which explains exactly what you'll have to change:

https://github.com/squix78/esp8266-oled-ssd1306#i2c-with-wireh

Kind regards,
Daniel

Comments

For the bernefit of others: did you try my suggestion and did it help?