For Data Acquisition we use a separate daemon for each interface. The daemon will read the interface cyclically and write the result to a shared memory . The visualization can now easily read the shared memory and display it's content. The daemon also has a mailbox . The visualization can write to this mailbox, in order to output signals to the interface. Within the daemon we heavily rely on rllib . You do not have to write the daemon manually. Instead you can use "pvdevelop". Within "pvdevelop" you fill out a small INI-file describing what you want to read from the interface. "pvdevelop" will then generate the daemon for you.
There are universal daemons for many protocols within pvbaddon.tar.gz . Within the documentation you can see what protocols are supported. The parameters for the daemons are given in a INI file.
Some interfaces use a different sheme. For example the EIB-Bus daemon is using a MySQL Database for storing the input values. Reflective Memory and PRIMO·S can be easily interfaced using their native API.
If the interface you are searching for is missing, we may help you. But we need hardware. You can lent us hardware or you can install it at your site. We could access the hardware from an ssh account on your computer for example.