OK…got a bit further, I have got a ESP32 Devkit V1 (DOIT) running now on my cantilever laser board.
I can connect to it over wifi fine but I am still awaiting a tf card holder so I cannot check the file upload option just yet but I can control the board from GRBL_WEBUI in my browser. Jogging works fine, as does the command line but I can’t seem to get the override panel to work. I also have a MKS TFT24 connected to the ESP32 and can issue commands from there ok except the power command to control the laser is not proportional at all, in fact it is all over the place.
Worse still is that connecting over the USB to LaserGRBL doesn’t appear to work either, it connects but if you send any command over USB it promptly disconnects. I will have to try re-compiling the firmware without wifi enabled, that way I may still be able to connect over USB and use LaserGRBL…enough for one day…more experimentation needed.