Im using stm32 bluepill im trying to use OLED 128x32 i have tried libraries but nothing is working,same OLED worked with Adruino Mega. If anyone knows what might be the issue please let me know[SOLVED]

You probably have an error.

hth

KnarfB

I've tried many many libraries but no luck. The screen remains blank. No response.

But the same screen works with arduino. So i know connections are fine, only problem with coding.

Here are the libraries that I've tried

1. https://github.com/vookimedlo/stm32-ssd1306
2. https://github.com/GolinskiyKonstantin/STM32_Lib_OLED_SSD1306_I2C_SPI
3. https://www.youtube.com/watch?v=ruDyTsmVls4
4. https://www.youtube.com/watch?v=Mt6U30Yxrr8

I've also tried changing the address from 0x78 to 0x77 and 0x3C but no luck.

I do not get error in any of them but the screen remains blank.

Hello,

Do you have pull-up resistors on the I²C lines ?

No i have connected them directly, i will try using pull up resistor and let you know

Hello @Mike_ST​  i tried with pull-up resistors 4.7k but still no response from oled display.

It works fine in all the videos on youtube even without pull-up resistor.

Can you suggest any other trouble shoot?

>It works fine in all the videos on youtube even without pull-up resistor.

In theory, I²C lines needs pull-up resistors, whatever the videos are showing.

They might have used internal pull-up resistors, but in some cases this is not enough.

> Can you suggest any other trouble shoot?

Check the I²C signal with a scope, and check that it is running at 100KHz.