Finish IO Exapnder
* Pin numbers are hardcoded into ESP32 lib code
* https://forum.arduino.cc/t/spi-interface-on-waveshare-esp32-c6-wroom-1/1344461
has more info on above topic.
Modify Makefile to disable unnecessary stdout in setport
* make setport now only outputs environment variables to the terminal.
To set the port your Arduino is on, run: eval $(make setport)