Associate pins to stations? (newbie Q)

[dan]

SIP was originally designed to work with shift registers and does not need a plugin for that.
Because users requested to be able to use inexpensive relay boards with SIP the plugins were developed.

Probably a majority of users are using relay boards with a plugin.

SIP's plugin system was added to be able to add specialized functionality without causing software bloat. Users can develop new features and share them with the user community.