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.
Streaming MP3 player for ESP32-S3: HTTP chunked download → MP3 decode → resample → PCM out, fully PSRAM-resident, with abortable lifecycle. Audio output and HTTP transport are injected via abstract interfaces, so the component is project-agnostic.
ESP32 RF Module Library for 315MHz and 433MHz signal transmission and reception. Designed for xiaozhi-esp32 project with MCP tools integration for AI voice control.