U8x8: Fonts

Because U8x8 treats characters as blocks, it doesn't need to load the entire screen memory before updating.

You cannot have a 12px or 20px font in U8x8; you are limited to multiples of 8. 📝 Usage Example

The fundamental rule is that every character you design must occupy a . Each character is stored as 8 individual bytes, with each byte controlling the state of the 8 pixels in a specific row. The leftmost pixel of the character corresponds to the most significant bit of that byte.

The U8g2 wiki is the definitive source. You can view the visual appearance of all u8x8 fonts here: u8x8 fonts

Contains only numbers (0–9) and basic math symbols (like colons, periods, and minus signs). Use this for clocks or sensor readouts to save memory.

Because it is a text-only subset, you cannot use standard U8g2 fonts.

Here is the pattern for the letter 'A' (8x8): Because U8x8 treats characters as blocks, it doesn't

While both modes exist in the same repository, they serve entirely different use cases.

Remember that u8x8.drawString(column, row, "text") uses tiles , not pixels. On a 128x64 display, you have 16 columns (0-15) and 8 rows (0-7). The "f" and "r" Suffixes:

are the essential building blocks for displaying information when resources are extremely tight. Part of the popular U8g2 graphics library Each character is stored as 8 individual bytes,

Need pixel-perfect graphics or proportional fonts? Switch to U8g2. But for pure text on small OLEDs – U8x8 is unbeatable.

When using large 2x2 fonts, remember that they occupy two rows and two columns. Adjust your next drawString coordinates accordingly so characters do not overwrite each other.

At the heart of this efficiency is the U8x8 font system. This comprehensive guide explores how U8x8 fonts work, how to choose the right one, and how to implement them to maximize performance and readability. What is a U8x8 Font?