IMPORTANT: Link Smart Rule only evaluates manual value changes. For example, if master thermostat if changed by Weekly schedule Smart Rule, this change is not applied to linked slave thermostat.

Positives:

(/) simple setup, no need for creating extra virtual device
(/) possible to assign priority when evaluating Link Smart Rule

Negatives:

(X) slower response time if evaluation is complex

Available for:

Switch, Thermostat, Analog output

Example:

Manual change of temperature on Thermostat living room changes also temperatures on other master thermostats (Thermostat kitchen), as well as on other slave thermostats (bedroom, kids room 1 and 2).

However if Thermostat bedroom is manually changed, it does not affect any other thermostat, only itself, because it is defined as slave.