Demonstrates the use of the UART.
This demo can be run on one or two ESP32 boards. It uses: RX=21, TX=22 for one UART and RX=33, TX=32 for the other.
Connect pin 21 to pin 32, and pin 22 to pin 33.
The easiest is to simple use the toit run commands.
For a single board
toit run pong.toit
and, in another terminal:
toit run ping.toit
Alternatively, for two boards:
toit run -d DEVICE_NAME_1 pong.toit
and, in another terminal:
toit run -d DEVICE_NAME_2 ping.toit