Grbl_ESP32_R is a fork of Grbl_ESP32. It is modified to support push messages, a new feature of rotary table GUI CNCR. Using push messages, CNCR can also be controlled using (4) macro buttons connected to the Grbl_ESP32_R controller.
The WiKi covers information about code changes, compiling and the setup of macro buttons to control CNCR. For all other information read the Grbl_ESP32 WiKi.