''new_variable: <zone>.<variable> | //filter//''

Creates a new variable within a previously created zone

  * **zone** is the name of the zone containing the variable
  * **variable** is the name of the new variable
  * **filter** is an optional flag – if present, the variable will only take values that can be parsed as floats, and these will be low-pass filtered to remove noise

//The "filter" flag should only be used on variables that receive regular updates e.g. one driven from a sensor.//