last 2 pixels at RHS of display remain on after reset about stm32-ssd1306 HOT 5 CLOSED

Thanks for reporting. This could be due to a couple of recent pull requests I accepted blindly. Could you please check if reverting the commit 5110f3e has any effect?

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Also could you please show a photo of how it looks like? Some displays actually have "a shifted XY plane" in a manner of speaking - this is a well known situation and requires changing a few macro.

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... particularly SSD1306_X_OFFSET - please see https://github.com/afiskon/stm32-ssd1306/blob/master/ssd1306/ssd1306_conf_template.h#L57

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Thank you for your speedy reply. Attached you will find 2 photos taken before the changes you proposed.

Reverting the commit did not solve the issue of the vertical border; but it did have an effect on the ssd1306_TestBorder() routine. Before the change the pixel traced a line along the top, then RHS, then Bottom right to left stopping in the middle of the line. Deleting the 4 lines and inserting the 1 line, the pixel traced the complete right to left line.

What actually solved the issue was your second suggestion of setting an offset with SSD1306_X_OFFSET. In my case value of 2 was required. Interesting as well was the fact that after this change reverting the commit 5110f3e was not needed so I went back to the original for consistency.

Thanks again for your prompt help.

Photos-001.zip

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🙏

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