For loops

[admin]

Check that you don't have other scripts that can cause an extra write or that the script itself does not change a group address that is mapped to the same tag.

A better approach is to split the script into several parts so only relevant code is run when a certain value changes. And check event.dst to determine which thermostat should be checked.

As for caching something like this can be used instead of grp.getvalue():

Code:

local values = {}

function getvalue(addr)
  if values[ addr ] == nil then
    values[ addr ] = grp.getvalue(addr)
  end

  return values[ addr ]
end