# GEX protocol documentation This repository specifies the control protocol implemented by [gex-core](https://github.com/gexpander/gex-core). - [FRAME_FORMAT.md](FRAME_FORMAT.md) - Low level frame format, message types - [INTERNAL_STRUCTURE.md](INTERNAL_STRUCTURE.md) - GEX's internal structure, units, requests and events - [INI_FILES.md](INI_FILES.md) - INI config files, filesystem and API access - [UNIT_DO.md](UNIT_DO.md) - Digital Output unit