An Evaluation and Implementation of Rule-Based Home Energy Management System Using the Rete Algorithm

Algorithm 4

An example of rule in Ruby.

rule:entrance_light,

[ElecAppliance,:ea,

 m.location == ENTRANCE_LOCATION,

 m.type == LIGHT_APPLIANCE_TYPE,

 m.status == OFF_STATUS],

[SensorData,:s,

 m.id == ID_FOR_TV_ON_LIVING_ROOM,

 m.type == WATT_SENSOR_TYPE,

 m.value > 1] do ∣context∣

 set_status(context[:ea].ip, # IP of the tap

  context[:ea].socket_id, “ON”)

 context[:ea].status = ON_STATUS

 modify context[:ea]

end