There are two power rails on the board which can be split (5v + 3.3V) or combined (3.3v only) which may allow you to connect Arduino shields to it. You can program the board using the standard 6 ...

The MAIN problem is due to Arduino awful TCPIP stack that doesn’t support select (because Arduino was designed as OS-free system with a single main loop). Now, with delay(1) you can only answer ...