\subsection{Pontech STP100}

The permitted board numbers are from 1 to 255.

The permitted values for digital I/O pins are:

\begin{tabular}{lll}
0              &-&Disable the pin.\\
3, 5, 6, 8     &-&The pin is active closed.\\
-3, -5, -6, -8 &-&The pin is active open.\\
\end{tabular}

Pins 5 and 6 are normally used for limit switches while either pin 3
or pin 8 is used for the home switch.  This is because pins 5 and 6
already have pullup resistors.

The output of the RP command is 0 = closed and 1 = open.

