ESP32 Forum

Posted: **Thu Apr 04, 2024 2:14 pm**

Hi
I am trying to get an ESP8266 with an integrated 9,96" OLED display to work with the SSD1306 library:

#define SDA 14
#define SCL 12
#define RST 16
#include <SSD1306.h>
SSD1306 display(0x3c);
does not work

.

an example with the U8G2 library works:

Code: Select all

U8G2_SSD1306_128X64_NONAME_F_SW_I2C 
u8g2(U8G2_R0,/*clock=*/12,/*data=*/14,U8X8_PIN_NONE) ;
void setup(void) { 
  u8g2.begin();

Has anyone got a clue how to bring it to work with the SSD1306 library?

All my code is written for the SSD1306 library, moving to U8G2 is not a option.

It appears clear that SDA is on GPIO14 and SCL is on GPIO12.
But how to find out, which address they have used?
Maybe a it has a non-standard I2C address?
I could not get the address to be detected by an I2C scanner either.

Thank you
Laszlo

Posted: **Fri Apr 05, 2024 12:37 pm**

The default I2C address is 0x3c.

I can't help you with the ssd1306 library, though, I made the support myself.

Posted: **Sat Apr 06, 2024 7:19 am**

Thank you.
I just don't understand why that display refuses to work with the usual SSD1306 library, and why it only works with the U8G2 library.

Posted: **Sat Apr 06, 2024 8:04 am**

No idea. Maybe the crap I2C implementation on the ESP8266 by Espressif. Avoid it if you can.

ESP32 Forum

trying to get an ESP8266 with an integrated 9,96" OLED display to work with the SSD1306 library

trying to get an ESP8266 with an integrated 9,96" OLED display to work with the SSD1306 library

Re: trying to get an ESP8266 with an integrated 9,96" OLED display to work with the SSD1306 library

Re: trying to get an ESP8266 with an integrated 9,96" OLED display to work with the SSD1306 library

Re: trying to get an ESP8266 with an integrated 9,96" OLED display to work with the SSD1306 library