A log of my "brain surgery" on a Cricut Expressions 2 to change the control board to something open so that I could cut what I wanted. The ESP32 GRBL board I used has bluetooth and WIFI built-in and was very easy to get working just the way I wanted.
Cricut Expressions 2 Display Hole Cover by MRedmon, Download free STL model
Cricut Expressions 2 to ESP32 GRBL Control
cricut expression 2 - Printmaking
Cricut expression and Accessories - Other Arts & Crafts
Grbl CNC Firmware on ESP32 at Blog
OTHER BUILDS/PROJECTS
Cricut Expression 2 - Arts & Crafts
Build List OpenBuilds
Cricut Expressions 2 to ESP32 GRBL Control
Cricut expression - Printmaking
Cricut expression - Arts & Crafts