*»> UNDER CONSTRUCTION «<*
Variables are typically generated by gadgets but also rules and can be consumed by gateways and rules. Additionaly they can displayed at GUI and logged in a file (data logger).
A value entry is based on a key value (content) pair with additional meta data (time, change flag, source, decimal place, unit)
The key of the value is a string with separators. “\<gadget-name\>.\<channel\>”
The content can be any data type of Python, typically int, float, string or dict. A conversion to string is done at the end of the data flow (e.g. gateway, web page)