Try running ls -ltr /tmp and finding a file with a name like /tmp/tmp.<some hash> for example: /tmp/tmp.iekIIJ
The latest one will hold the image data, move that to your /root directory and you'll have the oled image data of the last image displayed!
Thanks for that, completely missed it. I've tried plugging it in directly, non-directly (stacked on relay board) and even just using power and data lines using a bread board and it wouldn't work. Waited a while and stacked it again and now it's working. No idea what changed, pretty sure I did my last firmware update before this post. @Luciano-S. said in OLED expansion doesn't display anything:
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I was too busy since I created the topic and did not follow your answers @Lazar-Demin I am glad there is a fix to this bug and I am sorry I was not able to provide what you asked for. In the comming days I will try to test the new firmware and confirm the problem resolved.