u8x8_font_m2icon_7_f: Contains arrows, battery indicators, and settings gears.
Bold and High-ContrastSince 8x8 pixels is a small canvas, legibility can be an issue. Bold variants use more "on" pixels to ensure the text pops against the black background of an OLED.
Zero RAM Buffer: You save roughly 1024 bytes of RAM on a 128x64 display because the library doesn't need to "draw" the page in memory first. Popular U8x8 Font Categories u8x8 fonts
The U8x8 library, a sub-module of the popular U8g2 graphics driver, is the go-to solution for developers who need to display text on OLED or LCD screens while consuming as little memory as possible. Unlike the standard U8g2 mode which uses a memory-intensive RAM buffer, U8x8 writes directly to the display. This efficiency relies entirely on its specialized collection of "8x8" pixel fonts.
font_7x10_profont_n: Technically fits the 8x8 grid but uses internal spacing for better clarity. Zero RAM Buffer: You save roughly 1024 bytes
Fixed Width: Every character (from an 'i' to a 'W') occupies the same amount of space.
Memory ConstraintsIf you are using an ATtiny chip, stick to the 'r' (restricted) fonts. These include only basic ASCII characters, saving significant Flash memory compared to the 'f' (full) versions which include accented characters and extended symbols. How to Choose the Right Font
The Basic Sets (ISO 8859)These are the standard alphanumeric fonts. You will often see them suffixed with 'r' (reduced/restricted), 'n' (numbers only), or 'f' (full). font_8x8_pxp_r: A clean, classic pixel font.
u8x8_font_open_iconic_weather_2x2: Allows for larger weather icons by combining four 8x8 tiles into a 16x16 visual. How to Choose the Right Font