Wont compile with latest IDE software. Here is the solution.

[barrybeadman]

Wont compile with latest IDE software. I had to download an OLD version of the ESP32 library and turn off automatic update so it won't upgrade to 3.x.x. I used 2.0.10 version of ESP32 as that was the oldest offered.
fdivitto did an AMAZING job on this.

Now i'll attempt to make a wireless version with a cheapest ESP32 on the machine side.

[JacekRuzyczka]

Yes, I used to have the same issue as you had, but downgrading to 2.0.10 did NOT help me. Instead, the IDE complained about a non-existing board model:

Invalid FQBN: Board esp32:esp32:esp32-sbc-fabgl not found.

See also: OLIMEX/ESP32-SBC-FabGL#4