Compatible with the GRBLHAL official Web-builder, GRBLHAL can set to GRBL1.1f level.
The PIBot V4 board natively supports the GRBLHAL OLED, as this code was contributed by Luc from France (ESP3D Developer) and tested using the PiBot V4 mainboard.
https://www.youtube.com/watch?v=oF6c_Z9NqZs
https://www.youtube.com/watch?v=a-uMsHXXiX0
https://www.youtube.com/watch?v=C2_4c9iZdF0
pibotgrblhalwifi.zip