Lightweight framebuffer drawing utility for AI annotation overlays. Supports text, rectangles, lines, point markers, and detection boxes in RGB565/RGB888 with built-in bitmap fonts.
Timestamp service for ESP32 that works without a dedicated RTC module. Starts from build time on every boot, then corrects via SNTP sync or manual set — whichever suits the application. All corrections are explicit and observable via jump callbacks, safe for logging systems.