How bigtreetech/btt-expansion-module works
This repository is a documentation collection for BigTreeTech printer expansion hardware, not a software runtime. The README names EXP-MOT, RRF WiFi, and EEPROM; the tree also includes Mini12864 and ESP-WIFI documentation. These suggest motion, connectivity, storage, and display capabilities, but no source excerpts or documented wiring establish how the boards interact or define a user-to-result workflow. The graph therefore shows the documented product families without speculative connections.