Comments on: MicroPython: OLED Display with ESP32 and ESP8266

By: Alex Kottaram

Alex Kottaram — Thu, 13 Mar 2025 15:43:39 +0000

In reply to Sina. Pls do the i2c scan & find out the address of your display. Mostly it will be 0x3C. You have to change the default 0x3D and use this address in driver (line no 104 of driver)

By: Sara Santos

Sara Santos — Wed, 26 Jun 2024 17:10:34 +0000

In reply to Sina.

Hi.
Check that you’ve installed the library following the instructions in our guide.
Double-check your display connections.
Regards,
Sara

By: Sina

Sina — Tue, 25 Jun 2024 21:49:44 +0000

Traceback (most recent call last):
File “”, line 14, in
File “ssd1306.py”, line 116, in init
File “ssd1306.py”, line 36, in init
File “ssd1306.py”, line 61, in init_display
File “ssd1306.py”, line 121, in write_cmd
OSError: [Errno 19] ENODEV

May help me?

By: Klemm, Manfred

Klemm, Manfred — Wed, 13 Mar 2024 18:20:27 +0000

In reply to Sara Santos.

Hi Sara,
sorry it tooks some time …

https://drive.google.com/drive/folders/19lXA2PerWmP4Va7qkyfzl8iiWSuJRzDY?usp=sharing

By: Sara Santos

Sara Santos — Wed, 13 Mar 2024 18:00:04 +0000

In reply to Klemm, Manfred.

Share a link to the picture in google drive or imgur
Regards,
Sara

By: Klemm, Manfred

Klemm, Manfred — Wed, 13 Mar 2024 17:54:54 +0000

In reply to Sara Santos.

Hi Sara,
thank you very much.
I saved the library to the ESP32 device and the short code for ‘Hello, World’ to the device.
So there are three files on the device: boot.py, main.py and ssd1306.py
After restart the ESP32 the display showed just a black bar on the top and one at the bottom in adittion to the black snow pixels.
The pixel are not random. the black pixels are on fixed positions.

I would send you a few images if possible!?

Best regards
Manfred

By: Sara Santos

Sara Santos — Mon, 11 Mar 2024 17:17:17 +0000

In reply to Klemm, Manfred.

It seems like the display is running the default code and that it is not running the current code.
Make sure to upload the code as main.py and restart the ESP32 afterwards.
Regards,
Sara

By: Klemm, Manfred

Klemm, Manfred — Mon, 11 Mar 2024 11:52:44 +0000

In reply to Sara Santos.

Yes, I did .
Thank you for answering. I checked everything carefully.
Many other tutorials worked pretty fine. Just the Display is not working well.
I will double check all settings again.

Best Regards
Manfred

By: Sara Santos

Sara Santos — Mon, 11 Mar 2024 11:06:09 +0000

In reply to Klemm, Manfred.

Hi.
Did you upload the code to the ESP32 as main.py?
Regards,
Sara

By: Klemm, Manfred

Klemm, Manfred — Sun, 10 Mar 2024 17:03:29 +0000

Hello Sara,

Thank you very much for the great tutorials. I’ve had a lot of fun with MicroPython and the ESP32 as a result. I’ve gained a lot of experience and have been able to solve many problems on my own.

I’m facing a bigger issue with the OLED display ssd1306. Instead of displaying the words “Hello World,” it’s showing black snow on a light background. I’ve tried both the recommended library for ssd1306 and the one on GitHub, even with two other displays, but it still shows snow instead of text. The “snow image” is very consistent, and distinctive patterns don’t change. It seems like a distorted display of text output. Can you please help?

Thanks in advance.

Best regards,
Manfred