Region-of-interest JPEG decoder for ESP32. Decodes any rectangular sub-region of a JPEG without loading the full image, streaming output row-by-row so no full-frame buffer is required. Designed for LCD display use cases — provide your display dimensions and a pan offset, and the component handles scale selection, ROI math, and clamping internally. Built on TJpgDec. Supports FILE*, flash blobs, and PSRAM buffers as input sources. Runs on ESP32 (FreeRTOS async) and desktop (synchronous, for host testing).
Tiny CLI and script interpreter for embedded systems. 2KB flash, zero malloc, multi-instance. Interactive command line with scriptable dispatch, single-key menus, and pass-through mode.