[lpc/lpp eg] subscription and read request for scenario 4 on device connection

LPC/LPP EnergyGuard Prescenario and Initial scenario communication for
scenario 4 to subscribe on ElectricalConnection feature and trigger a
read request for electricalConnectionCharacteristicListData.

Author: kirollosnct

usecases/eg/lpc/events.go

@@ -102,6 +102,23 @@ func (e *LPC) connected(entity spineapi.EntityRemoteInterface) {
 			logging.Log().Debug(err)
 		}
 	}
+
+	if electricalConnection, err := client.NewElectricalConnection(e.LocalEntity, entity); err == nil {
+		if !electricalConnection.HasSubscription() {
+			if _, err := electricalConnection.Subscribe(); err != nil {
+				logging.Log().Debug(err)
+			}
+		}
+
+		// get characteristics
+		selector := &model.ElectricalConnectionCharacteristicListDataSelectorsType{
+			CharacteristicContext: util.Ptr(model.ElectricalConnectionCharacteristicContextTypeEntity),
+			CharacteristicType:    util.Ptr(e.characteristicType(entity)),
+		}
+		if _, err := electricalConnection.RequestCharacteristics(selector, nil); err != nil {
+			logging.Log().Debug(err)
+		}
+	}
 }
 
 // the load control limit description data was updated

usecases/eg/lpp/events.go

@@ -103,6 +103,23 @@ func (e *LPP) connected(entity spineapi.EntityRemoteInterface) {
 			logging.Log().Debug(err)
 		}
 	}
+
+	if electricalConnection, err := client.NewElectricalConnection(e.LocalEntity, entity); err == nil {
+		if !electricalConnection.HasSubscription() {
+			if _, err := electricalConnection.Subscribe(); err != nil {
+				logging.Log().Debug(err)
+			}
+		}
+
+		// get characteristics
+		selector := &model.ElectricalConnectionCharacteristicListDataSelectorsType{
+			CharacteristicContext: util.Ptr(model.ElectricalConnectionCharacteristicContextTypeEntity),
+			CharacteristicType:    util.Ptr(e.characteristicType(entity)),
+		}
+		if _, err := electricalConnection.RequestCharacteristics(selector, nil); err != nil {
+			logging.Log().Debug(err)
+		}
+	}
 }
 
 // the load control limit description data was updated