Reference board PCB – ESP32 Dev
PIN NOTES –
D1 (TX), D3 (RX) ostensibly usable, but for debug needs are still in use for serial.
GPI36, GPI39, GPI34, GPI35 (input only pins)
GPIO32, GPIO33, GPIO22, GPIO23
Other pins:
GPIO12 (12 can be used post boot. if held low = reset).
EN not wired, as its useless for our needs
