The Updated ESP32-Based Grbl CNC Control Board Is Now for Sale! - Hackster.io
GitHub - bdring/Grbl_ESP32_Development_Controller: A CNC controller to use and test Grbl_ESP32
Bodging up a Grbl-ESP32 board - Grbl - Maker Forums
Ready for next stage
ESP32 GRBL SHIELD - YouTube
Jon Raymond on Twitter: "To complement @buildlog amazing work porting GRBL to the ESP32 I've been working on an adapter board for using an ESP32 "DOIT" board on easily available Nano CNC