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Using LUA scripts, the user has full access to the functionality of the server – nearly any control functionality can be implemented this way. Moreover, most of the provided functionality can also be changed during runtime and so LUA scripts provides one of the most flexible way to extend the functionality of the NETx BMS Core Server system.
LUA itself is an open source scripting language. There are two main reasons why LUA was chosen as scripting language. First, LUA is very fast and so LUA scripts scale to large systems which is of utmost importance in the building automation domain – LUA scripts can handle thousands of datapoints. Second, due to the simple syntax of LUA, LUA scripting can easily be learned – even for beginners it is easy to write their own LUA scripts.
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The current version of our server used LUA 5.1 |
! However, as it is common for each programming language, some basic training is necessary to write LUA scripts. For the general syntax of the LUA scripting language please refer to www.lua.org. Here, tutorials and how-to's that can be used as a good starting point for beginners can be found.
LUA scripts are stored in normal text files that use the extension ".lua". Within the NETx BMS Core Server, all LUA scripts have to be stored within the script directory of the current workspace:
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