Geist Pixel (Square variant) in Adafruit GFX format for SSD1306 128×64 I2C. Font is 14 pt, 1-bit, suitable for ESP32 and other Arduino-compatible boards.
Hardware: ESP32-S3-DevKitC-1. SDA=GPIO8, SCL=GPIO9. OLED at 0x3C (or 0x3D in display.begin()).
Rebuild font: cd libraries/Adafruit_GFX_Library/fontconvert && make, then
./fontconvert /path/to/GeistPixel-Square.ttf 14 > .../GeistPixel_Square14pt7b.h
Add #pragma once and #include <Adafruit_GFX.h> at the top of the .h.
Edit glyphs (pixel grid): Adafruit GFX Font Customiser