diff --git a/pom.xml b/pom.xml
index 1cd3ec6..50c1f6c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -48,9 +48,14 @@
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
-            <version>1.18.20</version>
+            <version>1.18.22</version>
         </dependency>
 
+        <dependency>
+            <groupId>org.jsoup</groupId>
+            <artifactId>jsoup</artifactId>
+            <version>1.14.3</version>
+        </dependency>
         <dependency>
             <groupId>com.github.calimero</groupId>
             <artifactId>calimero-core</artifactId>
diff --git a/src/main/angular/src/app/api/device/Device.ts b/src/main/angular/src/app/api/device/Device.ts
index e2e20d8..0caac7e 100644
--- a/src/main/angular/src/app/api/device/Device.ts
+++ b/src/main/angular/src/app/api/device/Device.ts
@@ -1,4 +1,4 @@
-import {validateBooleanAllowNull, validateNumberAllowNull, validateNumberNotNull, validateStringNotEmptyNotNull, validateStringNullToEmpty} from "../validators";
+import {validateNumberNotNull, validateStringNotEmptyNotNull} from "../validators";
 import {Property} from "../property/property.service";
 
 export abstract class Device {
@@ -19,18 +19,14 @@ export abstract class Device {
           validateNumberNotNull(json['id']),
           validateStringNotEmptyNotNull(json['title']),
           type,
-          validateStringNullToEmpty(json['getState']),
-          validateStringNullToEmpty(json['setState']),
-          validateBooleanAllowNull(json['state']),
+          Property.fromJsonAllowNull(json['stateProperty']),
         );
       case "DeviceShutter":
         return new DeviceShutter(
           validateNumberNotNull(json['id']),
           validateStringNotEmptyNotNull(json['title']),
           type,
-          validateStringNullToEmpty(json['getPercent']),
-          validateStringNullToEmpty(json['setPercent']),
-          validateNumberAllowNull(json['percent']),
+          Property.fromJsonAllowNull(json['positionProperty']),
         );
     }
     throw new Error("No such type: " + type);
@@ -54,16 +50,14 @@ export class DeviceSwitch extends Device {
     id: number,
     title: string,
     type: string,
-    public getState: string,
-    public setState: string,
-    public state: boolean | null,
+    public stateProperty: Property | null,
   ) {
     super(id, title, type);
   }
 
   updateProperty(property: Property): void {
-    if (this.getState === property.name) {
-      this.state = property.booleanValue;
+    if (this.stateProperty?.name === property.name) {
+      this.stateProperty = property;
     }
   }
 
@@ -75,16 +69,14 @@ export class DeviceShutter extends Device {
     id: number,
     title: string,
     type: string,
-    public getPercent: string,
-    public setPercent: string,
-    public percent: number | null,
+    public positionProperty: Property | null,
   ) {
     super(id, title, type);
   }
 
   updateProperty(property: Property): void {
-    if (this.getPercent === property.name) {
-      this.percent = property.numberValue;
+    if (this.positionProperty?.name === property.name) {
+      this.positionProperty = property;
     }
   }
 
diff --git a/src/main/angular/src/app/api/property/property.service.ts b/src/main/angular/src/app/api/property/property.service.ts
index 47b3cf9..3656e62 100644
--- a/src/main/angular/src/app/api/property/property.service.ts
+++ b/src/main/angular/src/app/api/property/property.service.ts
@@ -1,6 +1,6 @@
 import {Injectable} from '@angular/core';
 import {ApiService, NO_OP} from "../api.service";
-import {validateBooleanAllowNull, validateDateAllowNull, validateNumberAllowNull, validateStringNotEmptyNotNull} from "../validators";
+import {validateDateAllowNull, validateNumberAllowNull, validateStringNotEmptyNotNull} from "../validators";
 import {ISearchService} from "../ISearchService";
 import {KeyValuePair} from "../KeyValuePair";
 import {Update} from "../Update";
@@ -10,10 +10,8 @@ export class Property {
   constructor(
     public name: string,
     public title: string,
-    public propertyType: string,
-    public booleanValue: boolean | null,
-    public numberValue: number | null,
-    public timestamp: Date | null,
+    public value: number | null,
+    public valueTimestamp: Date | null,
   ) {
     // nothing
   }
@@ -29,10 +27,8 @@ export class Property {
     return new Property(
       validateStringNotEmptyNotNull(json['name']),
       validateStringNotEmptyNotNull(json['title']),
-      validateStringNotEmptyNotNull(json['propertyType']),
-      validateBooleanAllowNull(json['booleanValue']),
-      validateNumberAllowNull(json['numberValue']),
-      validateDateAllowNull(json['timestamp']),
+      validateNumberAllowNull(json['value']),
+      validateDateAllowNull(json['valueTimestamp']),
     );
   }
 
@@ -69,8 +65,8 @@ export class PropertyService implements ISearchService {
     this.api.postReturnList("property/searchLike", term, KeyValuePair.fromJson, next, error);
   }
 
-  set(name: string, value: number, next: () => void = NO_OP, error: (error: any) => void = NO_OP): void {
-    this.api.postReturnNone("property/set", {name: name, value: value}, next, error)
+  set(property: Property, value: number, next: () => void = NO_OP, error: (error: any) => void = NO_OP): void {
+    this.api.postReturnNone("property/set", {name: property.name, value: value}, next, error)
   }
 
 }
diff --git a/src/main/angular/src/app/pages/device-list/device-list.component.html b/src/main/angular/src/app/pages/device-list/device-list.component.html
index ee40bc3..2d89c96 100644
--- a/src/main/angular/src/app/pages/device-list/device-list.component.html
+++ b/src/main/angular/src/app/pages/device-list/device-list.component.html
@@ -20,19 +20,19 @@
         <fa-icon [icon]="faEdit"></fa-icon>
       </div>
       <div class="controls">
-        <div class="control button" (click)="setShutterPercent(device, 0)">
+        <div class="control button" (click)="setShutterPosition(device, 0)">
           <span class="center">Auf</span>
         </div>
-        <div class="control button" (click)="setShutterPercent(device, 40)">
+        <div class="control button" (click)="setShutterPosition(device, 40)">
           <span class="center">50%</span>
         </div>
-        <div class="control button" (click)="setShutterPercent(device, 75)">
+        <div class="control button" (click)="setShutterPosition(device, 75)">
           <span class="center">90%</span>
         </div>
-        <div class="control button" (click)="setShutterPercent(device, 85)">
+        <div class="control button" (click)="setShutterPosition(device, 85)">
           <span class="center">Schlitze</span>
         </div>
-        <div class="control button" (click)="setShutterPercent(device, 100)">
+        <div class="control button" (click)="setShutterPosition(device, 100)">
           <span class="center">Zu</span>
         </div>
       </div>
diff --git a/src/main/angular/src/app/pages/device-list/device-list.component.ts b/src/main/angular/src/app/pages/device-list/device-list.component.ts
index c605019..3c01a1b 100644
--- a/src/main/angular/src/app/pages/device-list/device-list.component.ts
+++ b/src/main/angular/src/app/pages/device-list/device-list.component.ts
@@ -41,18 +41,18 @@ export class DeviceListComponent implements OnInit {
 
   setSwitchState(d: Device, value: boolean): void {
     const device: DeviceSwitch = d as DeviceSwitch;
-    if (!device.setState) {
+    if (!device.stateProperty) {
       throw new Error("Property 'setState' not set for: " + device);
     }
-    this.propertyService.set(device.setState, value ? 1 : 0);
+    this.propertyService.set(device.stateProperty, value ? 1 : 0);
   }
 
-  setShutterPercent(d: Device, value: number): void {
+  setShutterPosition(d: Device, value: number): void {
     const device: DeviceShutter = d as DeviceShutter;
-    if (!device.setPercent) {
-      throw new Error("Property 'setPercent' not set for: " + device);
+    if (!device.positionProperty) {
+      throw new Error("Property 'setPosition' not set for: " + device);
     }
-    this.propertyService.set(device.setPercent, value);
+    this.propertyService.set(device.positionProperty, value);
   }
 
   create(): void {
@@ -75,16 +75,16 @@ export class DeviceListComponent implements OnInit {
   }
 
   getSwitchClassList(device: Device): object {
-    const value: boolean | null | undefined = (device as DeviceSwitch).state;
+    const value: number | null | undefined = (device as DeviceSwitch).stateProperty?.value;
     return {
-      switchOn: value === true,
-      switchOff: value === false,
+      switchOn: value === 1,
+      switchOff: value === 0,
       switchUnknown: value === null || value === undefined,
     };
   }
 
   getShutterClassList(device: Device): object {
-    const value: number | null | undefined = (device as DeviceShutter).percent;
+    const value: number | null | undefined = (device as DeviceShutter).positionProperty?.value;
     return {
       shutterOpen: value === 0,
       shutterBetween: value !== null && value !== undefined && value > 0 && value < 100,
diff --git a/src/main/angular/src/app/pages/device/device.component.html b/src/main/angular/src/app/pages/device/device.component.html
index 9c202c1..da3f1bf 100644
--- a/src/main/angular/src/app/pages/device/device.component.html
+++ b/src/main/angular/src/app/pages/device/device.component.html
@@ -11,15 +11,9 @@
       </td>
     </tr>
     <tr>
-      <th>Zustand Lesen</th>
+      <th>Eigenschaft</th>
       <td>
-        <app-search [searchService]="propertyService" [initial]="deviceSwitch.getState" [showKey]="true" (valueChange)="setDeviceSwitch('getState', $event)"></app-search>
-      </td>
-    </tr>
-    <tr>
-      <th>Zustand Schreiben</th>
-      <td>
-        <app-search [searchService]="propertyService" [initial]="deviceSwitch.setState" [showKey]="true" (valueChange)="setDeviceSwitch('setState', $event)"></app-search>
+        <app-search [searchService]="propertyService" [initial]="deviceSwitch.stateProperty?.name" [showKey]="true" (valueChange)="setDeviceSwitch('stateProperty', $event)"></app-search>
       </td>
     </tr>
   </table>
@@ -34,15 +28,9 @@
       </td>
     </tr>
     <tr>
-      <th>Position Lesen</th>
+      <th>Eigenschaft</th>
       <td>
-        <app-search [searchService]="propertyService" [initial]="deviceShutter.getPercent" [showKey]="true" (valueChange)="setDeviceShutter('getPercent', $event)"></app-search>
-      </td>
-    </tr>
-    <tr>
-      <th>Position Schreiben</th>
-      <td>
-        <app-search [searchService]="propertyService" [initial]="deviceShutter.setPercent" [showKey]="true" (valueChange)="setDeviceShutter('setPercent', $event)"></app-search>
+        <app-search [searchService]="propertyService" [initial]="deviceShutter.positionProperty?.name" [showKey]="true" (valueChange)="setDeviceShutter('positionProperty', $event)"></app-search>
       </td>
     </tr>
   </table>
diff --git a/src/main/angular/src/app/pages/schedule/schedule.component.html b/src/main/angular/src/app/pages/schedule/schedule.component.html
index 90e7b4f..d3c65eb 100644
--- a/src/main/angular/src/app/pages/schedule/schedule.component.html
+++ b/src/main/angular/src/app/pages/schedule/schedule.component.html
@@ -18,7 +18,7 @@
       </td>
       <td colspan="9">
         <select [(ngModel)]="schedule.propertyType" (ngModelChange)="set(null,'propertyType', schedule.propertyType)">
-          <option value="ON_OFF">An / Aus</option>
+          <option value="SWITCH">An / Aus</option>
           <option value="PERCENT">Prozent</option>
           <option value="SHUTTER">Rollladen</option>
           <option value="SCENE">Szene</option>
@@ -137,7 +137,7 @@
         <td class="empty last"></td>
       </ng-container>
 
-      <td *ngIf="schedule.propertyType === 'ON_OFF'" [class.true]="entry.value" [class.false]="!entry.value" (click)="set(entry, 'value', entry.value > 0 ? 0 : 1)">
+      <td *ngIf="schedule.propertyType === 'SWITCH'" [class.true]="entry.value" [class.false]="!entry.value" (click)="set(entry, 'value', entry.value > 0 ? 0 : 1)">
         {{entry.value ? "An" : "Aus"}}
       </td>
       <td *ngIf="schedule.propertyType === 'PERCENT'" [class.true]="entry.value" [class.false]="!entry.value" [class.tristate]="0 < entry.value && entry.value < 100">
diff --git a/src/main/angular/src/app/shared/search/search.component.ts b/src/main/angular/src/app/shared/search/search.component.ts
index d5aaff7..3a50400 100644
--- a/src/main/angular/src/app/shared/search/search.component.ts
+++ b/src/main/angular/src/app/shared/search/search.component.ts
@@ -24,7 +24,7 @@ export class SearchComponent<T> implements OnInit {
   searchService!: ISearchService;
 
   @Input()
-  initial!: string;
+  initial?: string;
 
   @Input()
   showKey: boolean = false;
@@ -65,7 +65,7 @@ export class SearchComponent<T> implements OnInit {
   }
 
   start(): void {
-    this.term = this.initial;
+    this.term = this.initial || "";
     if (this.resultList && this.input) {
       this.resultList.style.left = this.input.style.left;
     }
diff --git a/src/main/java/de/ph87/homeautomation/BackendApplication.java b/src/main/java/de/ph87/homeautomation/BackendApplication.java
index c294547..b8948f1 100644
--- a/src/main/java/de/ph87/homeautomation/BackendApplication.java
+++ b/src/main/java/de/ph87/homeautomation/BackendApplication.java
@@ -1,5 +1,6 @@
 package de.ph87.homeautomation;
 
+import de.ph87.homeautomation.knx.group.KnxGroupImportService;
 import lombok.RequiredArgsConstructor;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
@@ -12,12 +13,15 @@ public class BackendApplication {
 
   private final DemoDataService demoDataService;
 
+  private final KnxGroupImportService knxGroupImportService;
+
   public static void main(String[] args) {
     SpringApplication.run(BackendApplication.class);
   }
 
   @PostConstruct
   public void postConstruct() {
+    knxGroupImportService.importGroups();
     demoDataService.insertDemoData();
   }
 
diff --git a/src/main/java/de/ph87/homeautomation/DemoDataService.java b/src/main/java/de/ph87/homeautomation/DemoDataService.java
index 7aa2591..ce54e9e 100644
--- a/src/main/java/de/ph87/homeautomation/DemoDataService.java
+++ b/src/main/java/de/ph87/homeautomation/DemoDataService.java
@@ -1,15 +1,15 @@
 package de.ph87.homeautomation;
 
 import com.luckycatlabs.sunrisesunset.Zenith;
+import de.ph87.homeautomation.channel.Channel;
 import de.ph87.homeautomation.device.DeviceRepository;
 import de.ph87.homeautomation.device.DeviceWriteService;
-import de.ph87.homeautomation.device.devices.DeviceDto;
 import de.ph87.homeautomation.knx.group.KnxGroup;
-import de.ph87.homeautomation.knx.group.KnxGroupRepository;
-import de.ph87.homeautomation.knx.group.KnxGroupWriteService;
+import de.ph87.homeautomation.knx.group.KnxGroupReadService;
 import de.ph87.homeautomation.property.Property;
-import de.ph87.homeautomation.property.PropertyDto;
+import de.ph87.homeautomation.property.PropertyRepository;
 import de.ph87.homeautomation.schedule.Schedule;
+import de.ph87.homeautomation.schedule.SchedulePropertyType;
 import de.ph87.homeautomation.schedule.ScheduleRepository;
 import de.ph87.homeautomation.schedule.entry.ScheduleEntry;
 import de.ph87.homeautomation.schedule.entry.ScheduleEntryType;
@@ -17,7 +17,6 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
-import tuwien.auto.calimero.GroupAddress;
 
 import java.time.ZonedDateTime;
 
@@ -32,52 +31,39 @@ public class DemoDataService {
 
   private static final Zenith BETWEEN_OFFICIAL_AND_CIVIL = new Zenith(93.0);
 
-  private final KnxGroupWriteService knxGroupWriteService;
-
   private final ScheduleRepository scheduleRepository;
 
-  private final KnxGroupRepository knxGroupRepository;
-
   private final DeviceWriteService deviceWriteService;
 
   private final DeviceRepository deviceRepository;
 
+  private final PropertyRepository propertyRepository;
+
+  private final KnxGroupReadService knxGroupReadService;
+
   public void insertDemoData() {
-    final KnxGroup eg_flur_licht_schalten = createKnxGroupIfNotExists("EG Flur Licht Schalten", 0, 5, 14, "1.001", false, false);
-
-    final KnxGroup ambiente_eg_status = createKnxGroupIfNotExists("Ambiente EG Status", 0, 3, 81, "1.001", true, false);
-    final KnxGroup ambiente_eg_schalten = createKnxGroupIfNotExists("Ambiente EG Schalten", 0, 3, 80, "1.001", false, false);
-
-    final KnxGroup ambiente_og_status = createKnxGroupIfNotExists("Ambiente OG Status", 0, 6, 2, "1.001", true, false);
-    final KnxGroup ambiente_og_schalten = createKnxGroupIfNotExists("Ambiente OG Schalten", 0, 6, 3, "1.001", false, false);
-
-    final KnxGroup wohnzimmer_rollladen_position_anfahren = createKnxGroupIfNotExists("Wohnzimmer Rollladen Position Anfahren", 0, 4, 24, "5.001", false, false);
-
-    final KnxGroup schlafzimmer_rollladen_position_anfahren = createKnxGroupIfNotExists("Schlafzimmer Rollladen Position Anfahren", 0, 3, 3, "5.001", false, false);
-
-    final KnxGroup flur_og_rollladen_position_anfahren = createKnxGroupIfNotExists("Flur Rollladen Position Anfahren", 0, 5, 13, "5.001", false, false);
-
-    final KnxGroup bad_licht_status = createKnxGroupIfNotExists("Bad Licht Status", 0, 5, 19, "1.001", true, false);
-    final KnxGroup bad_licht_schalten = createKnxGroupIfNotExists("Bad Licht Schalten", 0, 3, 73, "1.001", false, false);
-
-    final KnxGroup bad_licht_mitte_status = createKnxGroupIfNotExists("Bad Licht Mitte Status", 0, 3, 30, "1.001", true, false);
-    final KnxGroup bad_licht_mitte_schalten = createKnxGroupIfNotExists("Bad Licht Mitte Schalten", 0, 3, 29, "1.001", false, false);
-
-    final KnxGroup helligkeit = createKnxGroupIfNotExists("Helligkeit", 0, 5, 6, "9.004", false, true);
-
-    final KnxGroup szene_haus = createKnxGroupIfNotExists("Szene Haus", 0, 0, 21, "17.004", false, true);
+    final Property ambiente_eg = createProperty("ambiente.eg", "Ambiente EG", knx(0, 3, 81), knx(0, 3, 80));
+    final Property ambiente_og = createProperty("ambiente.og", "Ambiente OG", knx(0, 6, 2), knx(0, 6, 3));
+    final Property bad_licht = createProperty("bad.licht", "Bad Licht", knx(0, 5, 19), knx(0, 3, 73));
+    final Property bad_licht_mitte = createProperty("bad.licht.mitte", "Bad Licht Mitte", knx(0, 3, 30), knx(0, 3, 29));
+    final Property flur_eg_licht = createProperty("flur.eg.licht", "Flur EG Licht", knx(0, 4, 8), knx(0, 5, 14));
+    final Property wohnzimmer_rollladen = createProperty("wohnzimmer.rollladen", "Wohnzimmer Rollladen", null, knx(0, 4, 24));
+    final Property schlafzimmer_rollladen = createProperty("schlafzimmer_rollladen", "Schlafzimmer Rollladen", null, knx(0, 3, 3));
+    final Property flur_og_rollladen = createProperty("flur_og_rollladen", "Flur OG Rollladen", null, knx(0, 5, 13));
+    final Property helligkeit = createProperty("helligkeit", "Helligkeit", knx(0, 5, 6), null);
+    final Property szene_haus = createProperty("szene_haus", "Szene Haus ", null, knx(0, 0, 21));
 
     if (deviceRepository.count() == 0) {
-      createDeviceSwitch("Ambiente EG", ambiente_eg_status, ambiente_eg_schalten);
-      createDeviceSwitch("Ambiente OG", ambiente_og_status, ambiente_og_schalten);
-      createDeviceSwitch("Bad Licht", bad_licht_status, bad_licht_schalten);
-      createDeviceShutter("Wohnzimmer Rollladen", null, wohnzimmer_rollladen_position_anfahren);
-      createDeviceShutter("Schlafzimmer Rollladen", null, schlafzimmer_rollladen_position_anfahren);
-      createDeviceShutter("Flur Rollladen", null, flur_og_rollladen_position_anfahren);
+      deviceWriteService.createDeviceSwitch("Ambiente EG", ambiente_eg);
+      deviceWriteService.createDeviceSwitch("Ambiente OG", ambiente_og);
+      deviceWriteService.createDeviceSwitch("Bad Licht", bad_licht);
+      deviceWriteService.createDeviceShutter("Wohnzimmer Rollladen", wohnzimmer_rollladen);
+      deviceWriteService.createDeviceShutter("Schlafzimmer Rollladen", schlafzimmer_rollladen);
+      deviceWriteService.createDeviceShutter("Flur Rollladen", flur_og_rollladen);
     }
 
     if (scheduleRepository.count() == 0) {
-      final Schedule scheduleEgFlurLicht = createSchedule(true, "EG Flur Licht", eg_flur_licht_schalten);
+      final Schedule scheduleEgFlurLicht = createSchedule(true, "EG Flur Licht", flur_eg_licht, SchedulePropertyType.SWITCH);
       createTime(scheduleEgFlurLicht, true, 1, 0, 0, MIN30, true);
       createTime(scheduleEgFlurLicht, true, 2, 0, 0, MIN30, false);
       createTime(scheduleEgFlurLicht, true, 7, 30, 0, MIN30, true);
@@ -88,36 +74,36 @@ public class DemoDataService {
       createTime(scheduleEgFlurLicht, true, 20, 0, 0, MIN30, false);
       scheduleRepository.save(scheduleEgFlurLicht);
 
-      final Schedule scheduleEgAmbiente = createSchedule(false, "Ambiente EG", ambiente_eg_schalten);
+      final Schedule scheduleEgAmbiente = createSchedule(false, "Ambiente EG", ambiente_eg, SchedulePropertyType.SWITCH);
       createTime(scheduleEgAmbiente, true, 7, 15, 0, MIN30, true);
       createTime(scheduleEgAmbiente, true, 9, 30, 0, MIN30, false);
       createSunset(scheduleEgAmbiente, true, Zenith.OFFICIAL, MIN30, true);
       createSunset(scheduleEgAmbiente, true, Zenith.ASTRONOMICAL, MIN30, false);
       scheduleRepository.save(scheduleEgAmbiente);
 
-      final Schedule scheduleOgAmbiente = createSchedule(false, "Ambiente OG", ambiente_og_schalten);
+      final Schedule scheduleOgAmbiente = createSchedule(false, "Ambiente OG", ambiente_og, SchedulePropertyType.SWITCH);
       createTime(scheduleOgAmbiente, true, 7, 15, 0, MIN30, true);
       createTime(scheduleOgAmbiente, true, 9, 30, 0, MIN30, false);
       createSunset(scheduleOgAmbiente, true, Zenith.OFFICIAL, MIN30, true);
       createSunset(scheduleOgAmbiente, true, Zenith.ASTRONOMICAL, MIN30, false);
       scheduleRepository.save(scheduleOgAmbiente);
 
-      final Schedule scheduleWohnzimmerRollladen = createSchedule(true, "Rollläden Wohnzimmer", wohnzimmer_rollladen_position_anfahren);
+      final Schedule scheduleWohnzimmerRollladen = createSchedule(true, "Rollläden Wohnzimmer", wohnzimmer_rollladen, SchedulePropertyType.SHUTTER);
       createSunrise(scheduleWohnzimmerRollladen, true, BETWEEN_OFFICIAL_AND_CIVIL, 0, 0);
       createSunset(scheduleWohnzimmerRollladen, true, BETWEEN_OFFICIAL_AND_CIVIL, 0, 100);
       scheduleRepository.save(scheduleWohnzimmerRollladen);
 
-      final Schedule scheduleSchlafzimmerRollladen = createSchedule(true, "Rollläden Schlafzimmer", schlafzimmer_rollladen_position_anfahren);
+      final Schedule scheduleSchlafzimmerRollladen = createSchedule(true, "Rollläden Schlafzimmer", schlafzimmer_rollladen, SchedulePropertyType.SHUTTER);
       createTime(scheduleSchlafzimmerRollladen, true, 7, 0, 0, 0, 0);
       createSunset(scheduleSchlafzimmerRollladen, true, BETWEEN_OFFICIAL_AND_CIVIL, 0, 100);
       scheduleRepository.save(scheduleSchlafzimmerRollladen);
 
-      final Schedule scheduleFlurRollladen = createSchedule(true, "Rollladen Flur", flur_og_rollladen_position_anfahren);
+      final Schedule scheduleFlurRollladen = createSchedule(true, "Rollladen Flur", flur_og_rollladen, SchedulePropertyType.SHUTTER);
       createSunrise(scheduleFlurRollladen, true, BETWEEN_OFFICIAL_AND_CIVIL, 0, 0);
       createSunset(scheduleFlurRollladen, true, BETWEEN_OFFICIAL_AND_CIVIL, 0, 100);
       scheduleRepository.save(scheduleFlurRollladen);
 
-      final Schedule scheduleBadLichtMitte = createSchedule(false, "Bad Licht Mitte", bad_licht_mitte_schalten);
+      final Schedule scheduleBadLichtMitte = createSchedule(false, "Bad Licht Mitte", bad_licht_mitte, SchedulePropertyType.SWITCH);
       createTime(scheduleBadLichtMitte, true, 10, 30, 0, MIN30, true);
       createTime(scheduleBadLichtMitte, true, 11, 30, 0, MIN30, false);
       createTime(scheduleBadLichtMitte, true, 15, 30, 0, MIN30, true);
@@ -128,7 +114,7 @@ public class DemoDataService {
       createTime(scheduleBadLichtMitte, true, 1, 0, 0, MIN30, false);
       scheduleRepository.save(scheduleBadLichtMitte);
 
-      final Schedule scheduleSzeneHaus = createSchedule(true, "Dekoration", szene_haus);
+      final Schedule scheduleSzeneHaus = createSchedule(true, "Dekoration", szene_haus, SchedulePropertyType.SCENE);
       createTime(scheduleSzeneHaus, true, 6, 0, 0, 0, 31);
       createTime(scheduleSzeneHaus, true, 8, 30, 0, 0, 30);
       createSunset(scheduleSzeneHaus, true, Zenith.OFFICIAL, 0, 31);
@@ -137,28 +123,27 @@ public class DemoDataService {
     }
   }
 
-  private DeviceDto createDeviceSwitch(final String title, final Property getPercent, final Property setPercent) {
-    return deviceWriteService.createDeviceSwitch(title, getPercent, setPercent);
+  private KnxGroup knx(final int main, final int mid, final int sub) {
+    return knxGroupReadService.getByAddress(main, mid, sub);
   }
 
-  private DeviceDto createDeviceShutter(final String title, final Property getPercent, final Property setPercent) {
-    return deviceWriteService.createDeviceShutter(title, getPercent, setPercent);
+  private Property createProperty(final String name, final String title, final Channel readChannel, final Channel writeChannel) {
+    final Property property = propertyRepository.findByName(name).orElseGet(() -> propertyRepository.save(new Property(name)));
+    property.setTitle(title);
+    property.setReadChannel(readChannel);
+    property.setWriteChannel(writeChannel);
+    return property;
   }
 
-  private Schedule createSchedule(final boolean enabled, final String title, final PropertyDto propertyDto) {
+  private Schedule createSchedule(final boolean enabled, final String title, final Property property, final SchedulePropertyType propertyType) {
     final Schedule schedule = new Schedule();
     schedule.setEnabled(enabled);
     schedule.setTitle(title);
-    schedule.setPropertyName(propertyDto.getName());
-    schedule.setPropertyType(propertyDto.getPropertyType());
+    schedule.setProperty(property);
+    schedule.setPropertyType(propertyType);
     return schedule;
   }
 
-  private KnxGroup createKnxGroupIfNotExists(final String name, final int main, final int mid, final int sub, final String dpt, final boolean readable, final boolean multiGroup) {
-    final GroupAddress address = new GroupAddress(main, mid, sub);
-    return knxGroupRepository.findByAddressRaw(address.getRawAddress()).orElseGet(() -> knxGroupWriteService.create(name, address, dpt, readable, multiGroup));
-  }
-
   private ScheduleEntry createRelative(final Schedule schedule, final boolean enabled, final int inSeconds, final int fuzzySeconds, final Object value) {
     final ZonedDateTime now = ZonedDateTime.now().plusSeconds(inSeconds).withNano(0);
     return createTime(schedule, enabled, now.getHour(), now.getMinute(), now.getSecond(), fuzzySeconds, value);
diff --git a/src/main/java/de/ph87/homeautomation/channel/Channel.java b/src/main/java/de/ph87/homeautomation/channel/Channel.java
new file mode 100644
index 0000000..c301898
--- /dev/null
+++ b/src/main/java/de/ph87/homeautomation/channel/Channel.java
@@ -0,0 +1,27 @@
+package de.ph87.homeautomation.channel;
+
+import lombok.*;
+
+import javax.persistence.*;
+import java.time.ZonedDateTime;
+
+@Getter
+@Setter
+@ToString
+@NoArgsConstructor
+@Entity
+@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
+public abstract class Channel {
+
+  @Id
+  @GeneratedValue
+  @Setter(AccessLevel.NONE)
+  private Long id;
+
+  public abstract Class<? extends IChannelOwner> getChannelOwnerClass();
+
+  public abstract Double getValue();
+
+  public abstract ZonedDateTime getValueTimestamp();
+
+}
diff --git a/src/main/java/de/ph87/homeautomation/channel/ChannelChangedEvent.java b/src/main/java/de/ph87/homeautomation/channel/ChannelChangedEvent.java
new file mode 100644
index 0000000..f0f32e6
--- /dev/null
+++ b/src/main/java/de/ph87/homeautomation/channel/ChannelChangedEvent.java
@@ -0,0 +1,14 @@
+package de.ph87.homeautomation.channel;
+
+import lombok.Data;
+
+@Data
+public class ChannelChangedEvent {
+
+  private final long channelId;
+
+  public ChannelChangedEvent(final Channel channel) {
+    this.channelId = channel.getId();
+  }
+
+}
diff --git a/src/main/java/de/ph87/homeautomation/channel/ChannelService.java b/src/main/java/de/ph87/homeautomation/channel/ChannelService.java
new file mode 100644
index 0000000..b7eff5e
--- /dev/null
+++ b/src/main/java/de/ph87/homeautomation/channel/ChannelService.java
@@ -0,0 +1,36 @@
+package de.ph87.homeautomation.channel;
+
+import de.ph87.homeautomation.property.Property;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+import java.util.Optional;
+
+@Slf4j
+@Service
+@Transactional
+@RequiredArgsConstructor
+public class ChannelService {
+
+  private final List<IChannelOwner> channelOwners;
+
+  public Optional<IChannelOwner> findByChannel(final Channel channel) {
+    return channelOwners.stream().filter(owner -> channel.getChannelOwnerClass().isInstance(owner)).findFirst();
+  }
+
+  public IChannelOwner getByChannel(final Channel channel) {
+    return findByChannel(channel).orElseThrow(RuntimeException::new);
+  }
+
+  public void write(final Property property, final double value) {
+    final Channel channel = property.getWriteChannel();
+    if (channel == null) {
+      return;
+    }
+    getByChannel(channel).write(property, value);
+  }
+
+}
diff --git a/src/main/java/de/ph87/homeautomation/channel/IChannelOwner.java b/src/main/java/de/ph87/homeautomation/channel/IChannelOwner.java
new file mode 100644
index 0000000..d948d42
--- /dev/null
+++ b/src/main/java/de/ph87/homeautomation/channel/IChannelOwner.java
@@ -0,0 +1,9 @@
+package de.ph87.homeautomation.channel;
+
+import de.ph87.homeautomation.property.Property;
+
+public interface IChannelOwner {
+
+  void write(final Property property, final double value);
+
+}
diff --git a/src/main/java/de/ph87/homeautomation/device/DeviceController.java b/src/main/java/de/ph87/homeautomation/device/DeviceController.java
index 07e12d6..14a8fef 100644
--- a/src/main/java/de/ph87/homeautomation/device/DeviceController.java
+++ b/src/main/java/de/ph87/homeautomation/device/DeviceController.java
@@ -2,13 +2,14 @@ package de.ph87.homeautomation.device;
 
 import de.ph87.homeautomation.device.devices.Device;
 import de.ph87.homeautomation.device.devices.DeviceDto;
-import de.ph87.homeautomation.device.devices.DeviceShutter;
-import de.ph87.homeautomation.device.devices.DeviceSwitch;
+import de.ph87.homeautomation.property.PropertyReadService;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
 
+import static de.ph87.homeautomation.shared.Helpers.mapIfNotNull;
+
 @RestController
 @RequestMapping("device")
 @RequiredArgsConstructor
@@ -18,6 +19,8 @@ public class DeviceController {
 
   private final DeviceWriteService deviceWriteService;
 
+  private final PropertyReadService propertyReadService;
+
   @GetMapping("findAll")
   public List<DeviceDto> findAll() {
     return deviceReadService.findAll();
@@ -48,24 +51,14 @@ public class DeviceController {
     return deviceWriteService.set(id, Device::setTitle, title);
   }
 
-  @PostMapping("set/{id}/DeviceSwitch/setState")
-  public DeviceDto setDeviceSwitchSetState(@PathVariable final long id, @RequestBody(required = false) final String name) {
-    return deviceWriteService.setDeviceSwitch(id, DeviceSwitch::setSetState, name);
+  @PostMapping("set/{id}/DeviceSwitch/stateProperty")
+  public DeviceDto setDeviceSwitchStateProperty(@PathVariable final long id, @RequestBody(required = false) final String name) {
+    return deviceWriteService.setDeviceSwitch(id, (device, v) -> device.setStateProperty(mapIfNotNull(v, propertyReadService::getByName)), name);
   }
 
-  @PostMapping("set/{id}/DeviceSwitch/getState")
-  public DeviceDto setDeviceSwitchGetState(@PathVariable final long id, @RequestBody(required = false) final String name) {
-    return deviceWriteService.setDeviceSwitch(id, DeviceSwitch::setGetState, name);
-  }
-
-  @PostMapping("set/{id}/DeviceShutter/setPercent")
-  public DeviceDto setDeviceShutterSetPercent(@PathVariable final long id, @RequestBody(required = false) final String name) {
-    return deviceWriteService.setDeviceShutter(id, DeviceShutter::setSetPercent, name);
-  }
-
-  @PostMapping("set/{id}/DeviceShutter/getPercent")
-  public DeviceDto setDeviceShutterGetPercent(@PathVariable final long id, @RequestBody(required = false) final String name) {
-    return deviceWriteService.setDeviceShutter(id, DeviceShutter::setGetPercent, name);
+  @PostMapping("set/{id}/DeviceShutter/positionProperty")
+  public DeviceDto setDeviceShutterPositionProperty(@PathVariable final long id, @RequestBody(required = false) final String name) {
+    return deviceWriteService.setDeviceShutter(id, (device, v) -> device.setPositionProperty(mapIfNotNull(v, propertyReadService::getByName)), name);
   }
 
 }
diff --git a/src/main/java/de/ph87/homeautomation/device/DeviceReadService.java b/src/main/java/de/ph87/homeautomation/device/DeviceReadService.java
index 904c786..3453d22 100644
--- a/src/main/java/de/ph87/homeautomation/device/DeviceReadService.java
+++ b/src/main/java/de/ph87/homeautomation/device/DeviceReadService.java
@@ -1,7 +1,7 @@
 package de.ph87.homeautomation.device;
 
 import de.ph87.homeautomation.device.devices.*;
-import de.ph87.homeautomation.property.Property;
+import de.ph87.homeautomation.property.PropertyMapper;
 import de.ph87.homeautomation.web.NotFoundException;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -21,6 +21,8 @@ public class DeviceReadService {
 
   private final DeviceRepository deviceRepository;
 
+  private final PropertyMapper propertyMapper;
+
   public List<DeviceDto> findAll() {
     return deviceRepository.findAll().stream().map(this::toDto).collect(Collectors.toList());
   }
@@ -28,14 +30,12 @@ public class DeviceReadService {
   public DeviceDto toDto(final Device device) {
     if (device instanceof DeviceSwitch) {
       final DeviceSwitch deviceSwitch = (DeviceSwitch) device;
-      final Boolean state = mapIfNotNull(deviceSwitch.getGetState(), Property::getBoolean);
-      return new DeviceSwitchDto(deviceSwitch, mapIfNotNull(deviceSwitch.getGetState(), Property::getName), mapIfNotNull(deviceSwitch.getSetState(), Property::getName), state);
+      return new DeviceSwitchDto(deviceSwitch, mapIfNotNull(deviceSwitch.getStateProperty(), propertyMapper::toDto));
     } else if (device instanceof DeviceShutter) {
       final DeviceShutter deviceShutter = (DeviceShutter) device;
-      final Double percent = mapIfNotNull(deviceShutter.getGetPercent(), Property::getPercent);
-      return new DeviceShutterDto(deviceShutter, mapIfNotNull(deviceShutter.getGetPercent(), Property::getName), mapIfNotNull(deviceShutter.getSetPercent(), Property::getName), percent);
+      return new DeviceShutterDto(deviceShutter, mapIfNotNull(deviceShutter.getPositionProperty(), propertyMapper::toDto));
     }
-    throw new RuntimeException("Not implemented: toDto(" + device + ")");
+    throw new RuntimeException();
   }
 
   public Device getById(final long id) {
diff --git a/src/main/java/de/ph87/homeautomation/device/DeviceWriteService.java b/src/main/java/de/ph87/homeautomation/device/DeviceWriteService.java
index 96d0ed8..dd312ea 100644
--- a/src/main/java/de/ph87/homeautomation/device/DeviceWriteService.java
+++ b/src/main/java/de/ph87/homeautomation/device/DeviceWriteService.java
@@ -5,7 +5,7 @@ import de.ph87.homeautomation.device.devices.DeviceDto;
 import de.ph87.homeautomation.device.devices.DeviceShutter;
 import de.ph87.homeautomation.device.devices.DeviceSwitch;
 import de.ph87.homeautomation.property.Property;
-import de.ph87.homeautomation.property.PropertyService;
+import de.ph87.homeautomation.property.PropertyWriteService;
 import de.ph87.homeautomation.schedule.ScheduleWriteService;
 import de.ph87.homeautomation.web.BadRequestException;
 import lombok.RequiredArgsConstructor;
@@ -23,51 +23,26 @@ public class DeviceWriteService {
 
   private final DeviceRepository deviceRepository;
 
-  private final PropertyService propertyService;
+  private final PropertyWriteService propertyWriteService;
 
   private final DeviceReadService deviceReadService;
 
-  public DeviceDto createDeviceSwitch(final String title, final Property getStatePropertyName, final Property setStatePropertyName) {
+  public DeviceDto createDeviceSwitch(final String title, final Property stateProperty) {
     final DeviceSwitch deviceSwitch = new DeviceSwitch();
     deviceSwitch.setTitle(title);
-    deviceSwitch.setGetState(getStatePropertyName);
-    deviceSwitch.setSetState(setStatePropertyName);
+    deviceSwitch.setStateProperty(stateProperty);
     deviceRepository.save(deviceSwitch);
     return deviceReadService.toDto(deviceSwitch);
   }
 
-  public DeviceDto createDeviceShutter(final String title, final Property getPercentPropertyName, final Property setPercentPropertyName) {
+  public DeviceDto createDeviceShutter(final String title, final Property positionProperty) {
     final DeviceShutter deviceShutter = new DeviceShutter();
     deviceShutter.setTitle(title);
-    deviceShutter.setGetPercent(getPercentPropertyName);
-    deviceShutter.setSetPercent(setPercentPropertyName);
+    deviceShutter.setPositionProperty(positionProperty);
     deviceRepository.save(deviceShutter);
     return deviceReadService.toDto(deviceShutter);
   }
 
-  public void set(final DeviceSetDto dto) {
-    final Device device = deviceReadService.getById(dto.getId());
-    if (device instanceof DeviceSwitch) {
-      setSwitch((DeviceSwitch) device, dto.getProperty(), dto.getValue());
-    } else if (device instanceof DeviceShutter) {
-      setShutter((DeviceShutter) device, dto.getProperty(), dto.getValue());
-    }
-  }
-
-  private void setSwitch(final DeviceSwitch device, final String property, final double value) {
-    switch (property) {
-      case "switch":
-        propertyService.set(device.getSetState(), value);
-    }
-  }
-
-  private void setShutter(final DeviceShutter device, final String property, final double value) {
-    switch (property) {
-      case "percent":
-        propertyService.set(device.getSetPercent(), value);
-    }
-  }
-
   public <T> DeviceDto set(final long id, final BiConsumer<Device, T> setter, final T value) {
     final Device device = deviceReadService.getById(id);
     setter.accept(device, value);
@@ -99,9 +74,9 @@ public class DeviceWriteService {
   public DeviceDto create(final String type) {
     switch (type) {
       case "DeviceSwitch":
-        return createDeviceSwitch(generateUnusedTitle(), null, null);
+        return createDeviceSwitch(generateUnusedTitle(), null);
       case "DeviceShutter":
-        return createDeviceShutter(generateUnusedTitle(), null, null);
+        return createDeviceShutter(generateUnusedTitle(), null);
     }
     throw new RuntimeException("Not implemented type: " + type);
   }
diff --git a/src/main/java/de/ph87/homeautomation/device/devices/DeviceShutter.java b/src/main/java/de/ph87/homeautomation/device/devices/DeviceShutter.java
index 062bb00..c399dba 100644
--- a/src/main/java/de/ph87/homeautomation/device/devices/DeviceShutter.java
+++ b/src/main/java/de/ph87/homeautomation/device/devices/DeviceShutter.java
@@ -15,9 +15,6 @@ import javax.persistence.ManyToOne;
 public class DeviceShutter extends Device {
 
   @ManyToOne
-  private Property getPercent;
-
-  @ManyToOne
-  private Property setPercent;
+  private Property positionProperty;
 
 }
diff --git a/src/main/java/de/ph87/homeautomation/device/devices/DeviceShutterDto.java b/src/main/java/de/ph87/homeautomation/device/devices/DeviceShutterDto.java
index 700005e..589fb83 100644
--- a/src/main/java/de/ph87/homeautomation/device/devices/DeviceShutterDto.java
+++ b/src/main/java/de/ph87/homeautomation/device/devices/DeviceShutterDto.java
@@ -1,21 +1,16 @@
 package de.ph87.homeautomation.device.devices;
 
+import de.ph87.homeautomation.property.PropertyDto;
 import lombok.Getter;
 
 @Getter
 public class DeviceShutterDto extends DeviceDto {
 
-  public final String getPercent;
+  public final PropertyDto positionProperty;
 
-  public final String setPercent;
-
-  public final Double percent;
-
-  public DeviceShutterDto(final DeviceShutter device, final String getPercent, final String setPercent, final Double percent) {
+  public DeviceShutterDto(final DeviceShutter device, final PropertyDto positionProperty) {
     super(device);
-    this.getPercent = getPercent;
-    this.setPercent = setPercent;
-    this.percent = percent;
+    this.positionProperty = positionProperty;
   }
 
 }
diff --git a/src/main/java/de/ph87/homeautomation/device/devices/DeviceSwitch.java b/src/main/java/de/ph87/homeautomation/device/devices/DeviceSwitch.java
index ca32ec8..6143403 100644
--- a/src/main/java/de/ph87/homeautomation/device/devices/DeviceSwitch.java
+++ b/src/main/java/de/ph87/homeautomation/device/devices/DeviceSwitch.java
@@ -15,9 +15,6 @@ import javax.persistence.ManyToOne;
 public class DeviceSwitch extends Device {
 
   @ManyToOne
-  private Property setState;
-
-  @ManyToOne
-  private Property getState;
+  private Property stateProperty;
 
 }
diff --git a/src/main/java/de/ph87/homeautomation/device/devices/DeviceSwitchDto.java b/src/main/java/de/ph87/homeautomation/device/devices/DeviceSwitchDto.java
index 8936fb5..7cba6d7 100644
--- a/src/main/java/de/ph87/homeautomation/device/devices/DeviceSwitchDto.java
+++ b/src/main/java/de/ph87/homeautomation/device/devices/DeviceSwitchDto.java
@@ -1,21 +1,16 @@
 package de.ph87.homeautomation.device.devices;
 
+import de.ph87.homeautomation.property.PropertyDto;
 import lombok.Getter;
 
 @Getter
 public class DeviceSwitchDto extends DeviceDto {
 
-  public final String getState;
+  public final PropertyDto stateProperty;
 
-  public final String setState;
-
-  public final Boolean state;
-
-  public DeviceSwitchDto(final DeviceSwitch device, final String getState, final String setState, final Boolean state) {
+  public DeviceSwitchDto(final DeviceSwitch device, final PropertyDto stateProperty) {
     super(device);
-    this.getState = getState;
-    this.setState = setState;
-    this.state = state;
+    this.stateProperty = stateProperty;
   }
 
 }
diff --git a/src/main/java/de/ph87/homeautomation/knx/KnxThreadService.java b/src/main/java/de/ph87/homeautomation/knx/KnxThreadService.java
index 3fe2247..e5ca4e0 100644
--- a/src/main/java/de/ph87/homeautomation/knx/KnxThreadService.java
+++ b/src/main/java/de/ph87/homeautomation/knx/KnxThreadService.java
@@ -131,14 +131,14 @@ public class KnxThreadService extends AbstractThreadService implements NetworkLi
   @Override
   public void groupReadResponse(final ProcessEvent processEvent) {
     synchronized (databaseAccessLock) {
-      knxGroupWriteService.updateIfExists(processEvent.getDestination().getRawAddress(), processEvent.getASDU(), processEvent.getSourceAddr());
+      knxGroupWriteService.setReceivedData(processEvent.getDestination(), processEvent.getASDU(), processEvent.getSourceAddr());
     }
   }
 
   @Override
   public void groupWrite(final ProcessEvent processEvent) {
     synchronized (databaseAccessLock) {
-      knxGroupWriteService.updateIfExists(processEvent.getDestination().getRawAddress(), processEvent.getASDU(), processEvent.getSourceAddr());
+      knxGroupWriteService.setReceivedData(processEvent.getDestination(), processEvent.getASDU(), processEvent.getSourceAddr());
     }
   }
 
diff --git a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroup.java b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroup.java
index 90dcbea..f0ad9c8 100644
--- a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroup.java
+++ b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroup.java
@@ -1,24 +1,21 @@
 package de.ph87.homeautomation.knx.group;
 
-import lombok.AccessLevel;
-import lombok.Getter;
-import lombok.Setter;
-import lombok.ToString;
+import de.ph87.homeautomation.channel.Channel;
+import de.ph87.homeautomation.channel.IChannelOwner;
+import lombok.*;
 import tuwien.auto.calimero.GroupAddress;
 
-import javax.persistence.*;
+import javax.persistence.Column;
+import javax.persistence.Embedded;
+import javax.persistence.Entity;
 import java.time.ZonedDateTime;
 
 @Getter
 @Setter
 @ToString
 @Entity
-public class KnxGroup {
-
-  @Id
-  @GeneratedValue
-  @Setter(AccessLevel.NONE)
-  private Long id;
+@NoArgsConstructor
+public class KnxGroup extends Channel {
 
   @Setter(AccessLevel.NONE)
   @Column(nullable = false, unique = true)
@@ -28,45 +25,37 @@ public class KnxGroup {
   @Column(nullable = false, unique = true)
   private String addressStr;
 
-  @Setter(AccessLevel.NONE)
-  @Column(nullable = false, unique = true)
-  private String propertyName;
+  private int dptMain;
 
-  @Column(nullable = false)
-  private String dpt;
+  private int dptSub;
 
-  @Column(nullable = false)
-  private String title;
+  private String name;
 
-  @Column(nullable = false)
-  @Enumerated(EnumType.STRING)
-  private PropertyType propertyType;
+  private String description;
 
-  private byte[] value;
+  private int puid;
 
-  private int lastDeviceAddressRaw;
+  private boolean ets;
 
-  private String lastDeviceAddressString;
+  @Embedded
+  private KnxTelegram lastTelegram;
 
-  private Boolean booleanValue;
-
-  private Double numberValue;
+  private Double value;
 
   private ZonedDateTime valueTimestamp;
 
-  private byte[] sendValue;
-
-  private int readInterval;
-
-  @Column(nullable = false)
-  private boolean multiGroup;
-
   @Embedded
   private KnxGroupLinkInfo read = new KnxGroupLinkInfo();
 
+  private byte[] sendValue;
+
   @Embedded
   private KnxGroupLinkInfo send = new KnxGroupLinkInfo();
 
+  public KnxGroup(final GroupAddress address) {
+    setAddress(address);
+  }
+
   public void setAddress(final int rawAddress) {
     setAddress(new GroupAddress(rawAddress));
   }
@@ -74,11 +63,19 @@ public class KnxGroup {
   public void setAddress(final GroupAddress groupAddress) {
     this.addressRaw = groupAddress.getRawAddress();
     this.addressStr = groupAddress.toString();
-    this.propertyName = "knx.group." + groupAddress.getMainGroup() + "." + groupAddress.getMiddleGroup() + "." + groupAddress.getSubGroup8();
   }
 
   public GroupAddress getAddress() {
     return new GroupAddress(addressRaw);
   }
 
+  @Override
+  public Class<? extends IChannelOwner> getChannelOwnerClass() {
+    return KnxGroupChannelOwnerService.class;
+  }
+
+  public String getDpt() {
+    return String.format("%d.%03d", dptMain, dptSub);
+  }
+
 }
diff --git a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupChannelOwnerService.java b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupChannelOwnerService.java
new file mode 100644
index 0000000..dacdd1b
--- /dev/null
+++ b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupChannelOwnerService.java
@@ -0,0 +1,27 @@
+package de.ph87.homeautomation.knx.group;
+
+import de.ph87.homeautomation.channel.IChannelOwner;
+import de.ph87.homeautomation.property.Property;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Slf4j
+@Service
+@Transactional
+@RequiredArgsConstructor
+public class KnxGroupChannelOwnerService implements IChannelOwner {
+
+  private final KnxGroupWriteService knxGroupWriteService;
+
+  @Override
+  public void write(final Property property, final double value) {
+    if (!(property.getWriteChannel() instanceof KnxGroup)) {
+      throw new RuntimeException();
+    }
+    final KnxGroup knxGroup = (KnxGroup) property.getWriteChannel();
+    knxGroupWriteService.setSendValue(knxGroup, value);
+  }
+
+}
diff --git a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupDto.java b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupDto.java
deleted file mode 100644
index 1668e21..0000000
--- a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupDto.java
+++ /dev/null
@@ -1,27 +0,0 @@
-package de.ph87.homeautomation.knx.group;
-
-import de.ph87.homeautomation.property.PropertyDto;
-import lombok.Getter;
-
-@Getter
-public class KnxGroupDto {
-
-  public final long id;
-
-  public final PropertyDto property;
-
-  public final int addressRaw;
-
-  public final String addressStr;
-
-  public final String dpt;
-
-  public KnxGroupDto(final KnxGroup knxGroup) {
-    this.property = new PropertyDto(knxGroup.getPropertyName(), knxGroup.getTitle(), knxGroup.getPropertyType(), knxGroup.getBooleanValue(), knxGroup.getNumberValue(), knxGroup.getValueTimestamp());
-    this.id = knxGroup.getId();
-    this.addressRaw = knxGroup.getAddressRaw();
-    this.addressStr = knxGroup.getAddressStr();
-    this.dpt = knxGroup.getDpt();
-  }
-
-}
diff --git a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupFormatException.java b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupFormatException.java
deleted file mode 100644
index 8b44e2d..0000000
--- a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupFormatException.java
+++ /dev/null
@@ -1,9 +0,0 @@
-package de.ph87.homeautomation.knx.group;
-
-public class KnxGroupFormatException extends Exception {
-
-  public KnxGroupFormatException(final KnxGroup knxGroup, final double value, final String reason) {
-    super(String.format("Cannot use value %f (%s) to set KnxGroup: %s", value, reason, knxGroup));
-  }
-
-}
diff --git a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupImportService.java b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupImportService.java
new file mode 100644
index 0000000..3de1173
--- /dev/null
+++ b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupImportService.java
@@ -0,0 +1,52 @@
+package de.ph87.homeautomation.knx.group;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Element;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import tuwien.auto.calimero.GroupAddress;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+@Slf4j
+@Service
+@Transactional
+@RequiredArgsConstructor
+public class KnxGroupImportService {
+
+  private final KnxGroupRepository knxGroupRepository;
+
+  public void importGroups() {
+    knxGroupRepository.findAll().forEach(knxGroup -> knxGroup.setEts(false));
+    try {
+      Jsoup.parse(new File("/home/patrick/Zuhause-ETS5/G"), "UTF-8").select("GA").forEach(this::importGroup);
+    } catch (IOException e) {
+      log.error("Failed to import KnxGroups: {}", e.toString());
+    }
+  }
+
+  private void importGroup(final Element ga) {
+    final GroupAddress address = new GroupAddress(Integer.parseInt(ga.attr("Address")));
+    final KnxGroup knxGroup = knxGroupRepository.findByAddressRaw(address.getRawAddress()).orElseGet(() -> knxGroupRepository.save(new KnxGroup(address)));
+    setDpt(knxGroup, ga.attr("DatapointType"));
+    knxGroup.setName(ga.attr("Name"));
+    knxGroup.setDescription(ga.attr("Description"));
+    knxGroup.setPuid(Integer.parseInt(ga.attr("Puid")));
+    knxGroup.setEts(true);
+  }
+
+  private void setDpt(final KnxGroup knxGroup, final String dptString) {
+    final Matcher matcher = Pattern.compile("^DPST-(?<main>\\d+)-(?<sub>\\d+)$").matcher(dptString);
+    if (!matcher.matches()) {
+      throw new RuntimeException();
+    }
+    knxGroup.setDptMain(Integer.parseInt(matcher.group("main")));
+    knxGroup.setDptSub(Integer.parseInt(matcher.group("sub")));
+  }
+
+}
diff --git a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupLinkService.java b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupLinkService.java
index 93d6161..2cccca2 100644
--- a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupLinkService.java
+++ b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupLinkService.java
@@ -43,7 +43,7 @@ public class KnxGroupLinkService {
   private boolean send(final ProcessCommunicatorImpl processCommunicator, final KnxGroup knxGroup) throws KNXException {
     try {
       log.debug("Sending KnxGroup: {}", knxGroup);
-      processCommunicator.write(knxGroup.getAddress(), TranslatorTypes.createTranslator(knxGroup.getDpt(), knxGroup.getSendValue()));
+      processCommunicator.write(knxGroup.getAddress(), TranslatorTypes.createTranslator(knxGroup.getDptMain(), knxGroup.getDptSub(), knxGroup.getSendValue()));
       knxGroup.getSend().setErrorCount(0);
       knxGroup.getSend().setErrorMessage(null);
       knxGroup.getSend().setNextTimestamp(null);
@@ -64,11 +64,7 @@ public class KnxGroupLinkService {
       processCommunicator.read(createStateDP(knxGroup));
       knxGroup.getRead().setErrorCount(0);
       knxGroup.getRead().setErrorMessage(null);
-      if (knxGroup.getReadInterval() > 0) {
-        knxGroup.getRead().setNextTimestamp(align(knxGroup.getReadInterval()));
-      } else {
-        knxGroup.getRead().setNextTimestamp(null);
-      }
+      knxGroup.getRead().setNextTimestamp(null);
       return true;
     } catch (KNXFormatException e) {
       log.error(e.toString());
@@ -88,8 +84,7 @@ public class KnxGroupLinkService {
 
   private StateDP createStateDP(final KnxGroup knxGroup) {
     final GroupAddress groupAddress = knxGroup.getAddress();
-    final int mainNumber = Integer.parseInt(knxGroup.getDpt().split("\\.", 2)[0]);
-    return new StateDP(groupAddress, groupAddress.toString(), mainNumber, knxGroup.getDpt());
+    return new StateDP(groupAddress, groupAddress.toString(), knxGroup.getDptMain(), knxGroup.getDpt());
   }
 
   public ZonedDateTime getNextTimestamp() {
diff --git a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupMapperService.java b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupMapperService.java
deleted file mode 100644
index e8c34fc..0000000
--- a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupMapperService.java
+++ /dev/null
@@ -1,19 +0,0 @@
-package de.ph87.homeautomation.knx.group;
-
-import de.ph87.homeautomation.property.PropertyDto;
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
-
-@Slf4j
-@Service
-@Transactional
-@RequiredArgsConstructor
-public class KnxGroupMapperService {
-
-  public PropertyDto toPropertyDto(final KnxGroup knxGroup) {
-    return new PropertyDto(knxGroup.getPropertyName(), knxGroup.getTitle(), knxGroup.getPropertyType(), knxGroup.getBooleanValue(), knxGroup.getNumberValue(), knxGroup.getValueTimestamp());
-  }
-
-}
diff --git a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupOwnerService.java b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupOwnerService.java
deleted file mode 100644
index 1a3b5b9..0000000
--- a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupOwnerService.java
+++ /dev/null
@@ -1,90 +0,0 @@
-package de.ph87.homeautomation.knx.group;
-
-import de.ph87.homeautomation.property.IPropertyOwner;
-import de.ph87.homeautomation.property.PropertyDto;
-import de.ph87.homeautomation.property.PropertySetException;
-import lombok.Getter;
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.springframework.context.ApplicationEventPublisher;
-import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
-import tuwien.auto.calimero.GroupAddress;
-
-import java.util.List;
-import java.util.Optional;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-import java.util.stream.Collectors;
-
-import static de.ph87.homeautomation.shared.Helpers.quoteOrNull;
-
-@Slf4j
-@Service
-@Transactional
-@RequiredArgsConstructor
-public class KnxGroupOwnerService implements IPropertyOwner {
-
-  @Getter
-  private final Pattern propertyNamePattern = Pattern.compile("^knx\\.group\\.(\\d+)\\.(\\d+)\\.(\\d+)$");
-
-  private final KnxGroupWriteService knxGroupWriteService;
-
-  private final KnxGroupRepository knxGroupRepository;
-
-  private final ApplicationEventPublisher eventPublisher;
-
-  private final KnxGroupMapperService knxGroupMapperService;
-
-  @Override
-  public void setProperty(final String propertyName, final double value) throws PropertySetException {
-    final GroupAddress groupAddress = parseGroupAddress(propertyName);
-    try {
-      if (knxGroupWriteService.setSendValue(groupAddress, value)) {
-        eventPublisher.publishEvent(new KnxThreadWakeUpEvent());
-      } else {
-        log.error("No such KnxGroup.address = {}", groupAddress);
-      }
-    } catch (KnxGroupFormatException e) {
-      throw new PropertySetException(propertyName, value, e);
-    }
-  }
-
-  @Override
-  public Boolean readBoolean(final String propertyName) {
-    return knxGroupRepository.findByAddressRaw(parseGroupAddress(propertyName).getRawAddress()).map(KnxGroup::getBooleanValue).orElse(null);
-  }
-
-  @Override
-  public Double readNumber(final String propertyName) {
-    return knxGroupRepository.findByAddressRaw(parseGroupAddress(propertyName).getRawAddress()).map(KnxGroup::getNumberValue).orElse(null);
-  }
-
-  @Override
-  public List<PropertyDto> findAllProperties() {
-    return knxGroupRepository.findAll().stream().map(knxGroupMapperService::toPropertyDto).collect(Collectors.toList());
-  }
-
-  @Override
-  public List<PropertyDto> findAllPropertiesLike(final String like) {
-    return knxGroupRepository.findAllByPropertyNameLikeIgnoreCaseOrTitleLikeIgnoreCase(like, like).stream().map(knxGroupMapperService::toPropertyDto).collect(Collectors.toList());
-  }
-
-  @Override
-  public Optional<PropertyDto> findPropertyDtoByPropertyName(final String propertyName) {
-    return findKnxGroupByPropertyName(propertyName).map(knxGroupMapperService::toPropertyDto);
-  }
-
-  private Optional<KnxGroup> findKnxGroupByPropertyName(final String propertyName) {
-    return knxGroupRepository.findByPropertyName(propertyName);
-  }
-
-  private GroupAddress parseGroupAddress(final String propertyName) {
-    final Matcher matcher = propertyNamePattern.matcher(propertyName);
-    if (matcher.matches()) {
-      return new GroupAddress(Integer.parseInt(matcher.group(1)), Integer.parseInt(matcher.group(2)), Integer.parseInt(matcher.group(3)));
-    }
-    throw new RuntimeException("Cannot parse GroupAddress from propertyName: " + quoteOrNull(propertyName));
-  }
-
-}
diff --git a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupReadService.java b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupReadService.java
index 2556ef9..2402636 100644
--- a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupReadService.java
+++ b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupReadService.java
@@ -4,6 +4,7 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import tuwien.auto.calimero.GroupAddress;
 
 @Slf4j
 @Service
@@ -11,4 +12,10 @@ import org.springframework.transaction.annotation.Transactional;
 @RequiredArgsConstructor
 public class KnxGroupReadService {
 
+  private final KnxGroupRepository knxGroupRepository;
+
+  public KnxGroup getByAddress(final int main, final int mid, final int sub) {
+    return knxGroupRepository.findByAddressRaw(new GroupAddress(main, mid, sub).getRawAddress()).orElseThrow(RuntimeException::new);
+  }
+
 }
diff --git a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupRepository.java b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupRepository.java
index 7862c6a..654045a 100644
--- a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupRepository.java
+++ b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupRepository.java
@@ -6,7 +6,7 @@ import java.time.ZonedDateTime;
 import java.util.List;
 import java.util.Optional;
 
-public interface KnxGroupRepository extends CrudRepository<KnxGroup, Long> {
+public interface KnxGroupRepository extends CrudRepository<KnxGroup, String> {
 
   Optional<KnxGroup> findByAddressRaw(int rawAddress);
 
@@ -16,14 +16,8 @@ public interface KnxGroupRepository extends CrudRepository<KnxGroup, Long> {
 
   Optional<KnxGroup> findFirstByRead_NextTimestampLessThanEqualOrderByRead_NextTimestampAsc(ZonedDateTime timestamp);
 
-  List<KnxGroup> findAllByRead_AbleTrue();
-
   Optional<KnxGroup> findFirstByRead_NextTimestampNotNullOrderByRead_NextTimestampAsc();
 
   boolean existsByAddressRaw(int rawAddress);
 
-  List<KnxGroup> findAllByPropertyNameLikeIgnoreCaseOrTitleLikeIgnoreCase(String propertyNameLike, final String titleLike);
-
-  Optional<KnxGroup> findByPropertyName(String propertyName);
-
 }
diff --git a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupWriteService.java b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupWriteService.java
index e4561ff..3abaec9 100644
--- a/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupWriteService.java
+++ b/src/main/java/de/ph87/homeautomation/knx/group/KnxGroupWriteService.java
@@ -1,12 +1,10 @@
 package de.ph87.homeautomation.knx.group;
 
+import de.ph87.homeautomation.channel.ChannelChangedEvent;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
-import org.springframework.boot.context.event.ApplicationStartedEvent;
 import org.springframework.context.ApplicationEventPublisher;
-import org.springframework.context.event.EventListener;
 import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Propagation;
 import org.springframework.transaction.annotation.Transactional;
 import tuwien.auto.calimero.GroupAddress;
 import tuwien.auto.calimero.IndividualAddress;
@@ -16,12 +14,11 @@ import tuwien.auto.calimero.dptxlator.*;
 
 import java.time.ZonedDateTime;
 import java.util.Optional;
-import java.util.function.Consumer;
 import java.util.function.Function;
 
 @Slf4j
 @Service
-@Transactional(propagation = Propagation.REQUIRES_NEW)
+@Transactional
 @RequiredArgsConstructor
 public class KnxGroupWriteService {
 
@@ -29,107 +26,77 @@ public class KnxGroupWriteService {
 
   private final ApplicationEventPublisher applicationEventPublisher;
 
-  private final ApplicationEventPublisher eventPublisher;
-
-  private final KnxGroupMapperService knxGroupMapperService;
-
-  @EventListener(ApplicationStartedEvent.class)
-  public void markAllForRead() {
-    knxGroupRepository.findAllByRead_AbleTrue().forEach(knxGroup -> knxGroup.getRead().setNextTimestamp(ZonedDateTime.now()));
-    eventPublisher.publishEvent(new KnxThreadWakeUpEvent());
-  }
-
-  public void updateIfExists(final int rawAddress, final byte[] data, final IndividualAddress knxDeviceAddress) {
-    final Optional<KnxGroup> knxGroupOptional = knxGroupRepository.findByAddressRaw(rawAddress);
-    if (knxGroupOptional.isEmpty()) {
-      log.debug("No KnxGroup with address={}", new GroupAddress(rawAddress));
-    }
-    knxGroupOptional.ifPresent(knxGroup -> {
-      knxGroup.setValue(data);
-      knxGroup.setLastDeviceAddressRaw(knxDeviceAddress.getRawAddress());
-      knxGroup.setLastDeviceAddressString(knxDeviceAddress.toString());
-      knxGroup.setValueTimestamp(ZonedDateTime.now());
-      knxGroup.setBooleanValue(null);
-      knxGroup.setNumberValue(null);
+  public void setSendValue(final KnxGroup knxGroup, final double value) {
+    findTranslator(knxGroup).ifPresent(translator -> {
       try {
-        final DPTXlator translator = findTranslator(knxGroup);
-        translator.setData(data);
-        translate(DPTXlatorBoolean.class, translator, value -> setBooleanValue(knxGroup, value), DPTXlatorBoolean::getValueBoolean);
-        translate(DPTXlator8BitUnsigned.class, translator, knxGroup::setNumberValue, DPTXlator8BitUnsigned::getNumericValue);
-        translate(DPTXlator2ByteFloat.class, translator, knxGroup::setNumberValue, DPTXlator2ByteFloat::getNumericValue);
-        translate(DPTXlator2ByteUnsigned.class, translator, knxGroup::setNumberValue, DPTXlator2ByteUnsigned::getNumericValue);
-        translate(DPTXlator4ByteFloat.class, translator, knxGroup::setNumberValue, DPTXlator4ByteFloat::getNumericValue);
-        translate(DPTXlator4ByteSigned.class, translator, knxGroup::setNumberValue, DPTXlator4ByteSigned::getNumericValue);
-        translate(DPTXlator4ByteUnsigned.class, translator, knxGroup::setNumberValue, DPTXlator4ByteUnsigned::getNumericValue);
-        translate(DPTXlator8BitSigned.class, translator, knxGroup::setNumberValue, DPTXlator8BitSigned::getNumericValue);
-        translate(DPTXlator64BitSigned.class, translator, knxGroup::setNumberValue, DPTXlator64BitSigned::getNumericValue);
-        translate(DPTXlatorSceneNumber.class, translator, knxGroup::setNumberValue, DPTXlatorSceneNumber::getNumericValue);
-        // TODO implement all DPTXlator...
-      } catch (NoTranslatorException e) {
-        log.error(e.getMessage());
+        if (translator instanceof DPTXlatorBoolean) {
+          ((DPTXlatorBoolean) translator).setValue(value == 1.0);
+        } else if (translator instanceof DPTXlator8BitUnsigned) {
+          ((DPTXlator8BitUnsigned) translator).setValue((int) value);
+        } else { // TODO implement all DPTXlator...
+          translator.setValue("" + value);
+        }
+        knxGroup.getSend().setNextTimestamp(ZonedDateTime.now());
+        knxGroup.setSendValue(translator.getData());
+        applicationEventPublisher.publishEvent(new KnxThreadWakeUpEvent());
+      } catch (KNXFormatException e) {
+        log.error("Failed set value \"{}\" to DptXlator {} for KnxGroup {}", value, translator, knxGroup);
       }
-      log.debug("KnxGroup updated: {}", knxGroup);
     });
   }
 
-  private void setBooleanValue(final KnxGroup knxGroup, final Boolean value) {
-    knxGroup.setBooleanValue(value);
-    if (value == null) {
-      knxGroup.setNumberValue(null);
-    } else {
-      knxGroup.setNumberValue(value ? 1.0 : 0.0);
-    }
-  }
-
-  private <X extends DPTXlator, T> void translate(final Class<X> dptXlatorClass, final DPTXlator translator, final Consumer<T> setter, final Function<X, T> getter) {
-    if (dptXlatorClass.isInstance(translator)) {
-      setter.accept(getter.apply(dptXlatorClass.cast(translator)));
-    }
-  }
-
-  public KnxGroup create(final String name, final GroupAddress address, final String dpt, final boolean readable, final boolean multiGroup) {
-    final KnxGroup trans = new KnxGroup();
-    trans.setAddress(address);
-    trans.setDpt(dpt);
-    trans.setMultiGroup(multiGroup);
-    trans.setTitle(name);
-    trans.getRead().setAble(readable);
-    return knxGroupRepository.save(trans);
-  }
-
-  public boolean setSendValue(final GroupAddress groupAddress, final double value) throws KnxGroupFormatException {
+  public void setReceivedData(final GroupAddress groupAddress, final byte[] data, final IndividualAddress knxDeviceAddress) {
     final Optional<KnxGroup> knxGroupOptional = knxGroupRepository.findByAddressRaw(groupAddress.getRawAddress());
     if (knxGroupOptional.isEmpty()) {
-      return false;
+      log.error("No KnxGroup with address={}", groupAddress);
+      return;
     }
     final KnxGroup knxGroup = knxGroupOptional.get();
-    try {
-      final DPTXlator translator = findTranslator(knxGroup);
-      if (translator instanceof DPTXlatorBoolean) {
-        ((DPTXlatorBoolean) translator).setValue(value == 1.0);
-      } else if (translator instanceof DPTXlator8BitUnsigned) {
-        ((DPTXlator8BitUnsigned) translator).setValue((int) value);
-      } else { // TODO implement all DPTXlator...
-        translator.setValue("" + value);
+    knxGroup.setLastTelegram(new KnxTelegram(data, ZonedDateTime.now(), knxDeviceAddress));
+    translate(knxGroup);
+  }
+
+  private void translate(final KnxGroup knxGroup) {
+    findTranslator(knxGroup).ifPresent(translator -> {
+      translator.setData(knxGroup.getLastTelegram().getData());
+      final Optional<Double> valueOptional = translate(DPTXlatorBoolean.class, translator, DPTXlatorBoolean::getNumericValue)
+        .or(() -> translate(DPTXlator8BitUnsigned.class, translator, DPTXlator8BitUnsigned::getNumericValue))
+        .or(() -> translate(DPTXlator2ByteFloat.class, translator, DPTXlator2ByteFloat::getNumericValue))
+        .or(() -> translate(DPTXlator2ByteUnsigned.class, translator, DPTXlator2ByteUnsigned::getNumericValue))
+        .or(() -> translate(DPTXlator4ByteFloat.class, translator, DPTXlator4ByteFloat::getNumericValue))
+        .or(() -> translate(DPTXlator4ByteSigned.class, translator, DPTXlator4ByteSigned::getNumericValue))
+        .or(() -> translate(DPTXlator4ByteUnsigned.class, translator, DPTXlator4ByteUnsigned::getNumericValue))
+        .or(() -> translate(DPTXlator8BitSigned.class, translator, DPTXlator8BitSigned::getNumericValue))
+        .or(() -> translate(DPTXlator64BitSigned.class, translator, DPTXlator64BitSigned::getNumericValue))
+        .or(() -> translate(DPTXlatorSceneNumber.class, translator, DPTXlatorSceneNumber::getNumericValue));
+      // TODO implement all DPTXlator...
+      if (valueOptional.isPresent()) {
+        knxGroup.setValue(valueOptional.get());
+        knxGroup.setValueTimestamp(ZonedDateTime.now());
+        log.debug("KnxGroup updated: {}", knxGroup);
+        applicationEventPublisher.publishEvent(new ChannelChangedEvent(knxGroup));
+      } else {
+        log.error("Failed to get value from DptXlator {} for KnxGroup {}", translator, knxGroup);
       }
-      knxGroup.setSendValue(translator.getData());
-      knxGroup.getSend().setNextTimestamp(ZonedDateTime.now());
-      return true;
-    } catch (NoTranslatorException | KNXFormatException e) {
-      throw new KnxGroupFormatException(knxGroup, value, e.getMessage());
+    });
+  }
+
+  private Optional<DPTXlator> findTranslator(final KnxGroup knxGroup) {
+    try {
+      return Optional.of(TranslatorTypes.createTranslator(knxGroup.getDptMain(), knxGroup.getDpt()));
+    } catch (KNXException e) {
+      log.error("No DptXlator found for KnxGroup: {}", knxGroup);
+      return Optional.empty();
     }
   }
 
-  private DPTXlator findTranslator(final KnxGroup knxGroup) throws NoTranslatorException {
-    if (knxGroup.getDpt() == null) {
-      throw new NoTranslatorException("Missing DPT");
-    }
-    final int mainNumber = Integer.parseInt(knxGroup.getDpt().split("\\.")[0]);
-    try {
-      return TranslatorTypes.createTranslator(mainNumber, knxGroup.getDpt());
-    } catch (KNXException e) {
-      throw new NoTranslatorException(e);
+  private <Xlator extends DPTXlator, Value> Optional<Value> translate(final Class<Xlator> dptXlatorClass, final DPTXlator translator, final Function<Xlator, Value> getValueFromXlator) {
+    if (dptXlatorClass.isInstance(translator)) {
+      final Xlator castXlator = dptXlatorClass.cast(translator);
+      final Value value = getValueFromXlator.apply(castXlator);
+      return Optional.of(value);
     }
+    return Optional.empty();
   }
 
 }
diff --git a/src/main/java/de/ph87/homeautomation/knx/group/KnxTelegram.java b/src/main/java/de/ph87/homeautomation/knx/group/KnxTelegram.java
new file mode 100644
index 0000000..aee07eb
--- /dev/null
+++ b/src/main/java/de/ph87/homeautomation/knx/group/KnxTelegram.java
@@ -0,0 +1,32 @@
+package de.ph87.homeautomation.knx.group;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.ToString;
+import tuwien.auto.calimero.IndividualAddress;
+
+import javax.persistence.Embeddable;
+import java.time.ZonedDateTime;
+
+@Getter
+@ToString
+@Embeddable
+@NoArgsConstructor
+public class KnxTelegram {
+
+  private byte[] data;
+
+  private ZonedDateTime timestamp;
+
+  private Integer deviceAddressRaw;
+
+  private String deviceAddressString;
+
+  public KnxTelegram(final byte[] data, final ZonedDateTime timestamp, final IndividualAddress deviceAddress) {
+    this.data = data;
+    this.timestamp = timestamp;
+    this.deviceAddressRaw = deviceAddress.getRawAddress();
+    this.deviceAddressString = deviceAddress.toString();
+  }
+
+}
diff --git a/src/main/java/de/ph87/homeautomation/knx/group/KnxThreadWakeUpEvent.java b/src/main/java/de/ph87/homeautomation/knx/group/KnxThreadWakeUpEvent.java
index 56c7d07..3361a2c 100644
--- a/src/main/java/de/ph87/homeautomation/knx/group/KnxThreadWakeUpEvent.java
+++ b/src/main/java/de/ph87/homeautomation/knx/group/KnxThreadWakeUpEvent.java
@@ -1,5 +1,8 @@
 package de.ph87.homeautomation.knx.group;
 
+import lombok.Data;
+
+@Data
 public class KnxThreadWakeUpEvent {
 
 }
diff --git a/src/main/java/de/ph87/homeautomation/knx/group/NoTranslatorException.java b/src/main/java/de/ph87/homeautomation/knx/group/NoTranslatorException.java
deleted file mode 100644
index 58bdb3c..0000000
--- a/src/main/java/de/ph87/homeautomation/knx/group/NoTranslatorException.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package de.ph87.homeautomation.knx.group;
-
-import tuwien.auto.calimero.KNXException;
-
-public class NoTranslatorException extends Exception {
-
-  public NoTranslatorException(final String message) {
-    super("Cannot create translator: " + message);
-  }
-
-  public NoTranslatorException(final KNXException e) {
-    super("Cannot create translator: " + e.toString());
-  }
-
-}
diff --git a/src/main/java/de/ph87/homeautomation/property/Property.java b/src/main/java/de/ph87/homeautomation/property/Property.java
index f469faf..672026e 100644
--- a/src/main/java/de/ph87/homeautomation/property/Property.java
+++ b/src/main/java/de/ph87/homeautomation/property/Property.java
@@ -1,21 +1,16 @@
 package de.ph87.homeautomation.property;
 
-import lombok.AccessLevel;
-import lombok.Getter;
-import lombok.Setter;
-import lombok.ToString;
+import de.ph87.homeautomation.channel.Channel;
+import lombok.*;
 
-import javax.persistence.Column;
-import javax.persistence.Entity;
-import javax.persistence.GeneratedValue;
-import javax.persistence.Id;
+import javax.persistence.*;
 import java.time.ZonedDateTime;
-import java.util.Objects;
 
 @Getter
 @Setter
 @ToString
 @Entity
+@NoArgsConstructor
 public final class Property {
 
   @Id
@@ -23,7 +18,7 @@ public final class Property {
   @Setter(AccessLevel.NONE)
   private Long id;
 
-  @Column(nullable = false, unique = true)
+  @Column(nullable = false)
   private String name;
 
   @Column(unique = true)
@@ -33,20 +28,14 @@ public final class Property {
 
   private Double value;
 
-  public Boolean getBoolean() {
-    final boolean isTrue = Objects.equals(value, 1.0);
-    final boolean isFalse = Objects.equals(value, 0.0);
-    if (value == null || (!isTrue && !isFalse)) {
-      return null;
-    }
-    return isTrue;
-  }
+  @ManyToOne
+  private Channel readChannel;
 
-  public Double getPercent() {
-    if (value == null || value < 0.0 || 100.0 < value) {
-      return null;
-    }
-    return value;
+  @ManyToOne
+  private Channel writeChannel;
+
+  public Property(final String name) {
+    this.name = name;
   }
 
 }
diff --git a/src/main/java/de/ph87/homeautomation/property/PropertyController.java b/src/main/java/de/ph87/homeautomation/property/PropertyController.java
new file mode 100644
index 0000000..63ec723
--- /dev/null
+++ b/src/main/java/de/ph87/homeautomation/property/PropertyController.java
@@ -0,0 +1,45 @@
+package de.ph87.homeautomation.property;
+
+import de.ph87.homeautomation.shared.ISearchController;
+import de.ph87.homeautomation.shared.KeyValuePair;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+@RestController
+@RequestMapping("property")
+@RequiredArgsConstructor
+public class PropertyController implements ISearchController {
+
+  private final PropertyWriteService propertyWriteService;
+
+  private final PropertyReadService propertyReadService;
+
+  @PostMapping("set")
+  public void set(@RequestBody final PropertySetDto dto) {
+    propertyWriteService.write(dto.getName(), dto.getValue());
+  }
+
+  @Override
+  @PostMapping("getById")
+  public KeyValuePair getById(@RequestBody final String name) {
+    final PropertyDto propertyDto = propertyReadService.getDtoByName(name);
+    return toKeyValuePair(propertyDto);
+  }
+
+  @Override
+  @PostMapping("searchLike")
+  public List<KeyValuePair> searchLike(@RequestBody final String term) {
+    return propertyReadService.findAllDtoLike("%" + term + "%").stream().map(this::toKeyValuePair).collect(Collectors.toList());
+  }
+
+  private KeyValuePair toKeyValuePair(final PropertyDto propertyDto) {
+    return new KeyValuePair(propertyDto.getName(), propertyDto.getTitle());
+  }
+
+}
diff --git a/src/main/java/de/ph87/homeautomation/property/PropertyDto.java b/src/main/java/de/ph87/homeautomation/property/PropertyDto.java
index df9ab41..4988cb8 100644
--- a/src/main/java/de/ph87/homeautomation/property/PropertyDto.java
+++ b/src/main/java/de/ph87/homeautomation/property/PropertyDto.java
@@ -2,10 +2,11 @@ package de.ph87.homeautomation.property;
 
 import lombok.Data;
 
+import java.io.Serializable;
 import java.time.ZonedDateTime;
 
 @Data
-public final class PropertyDto {
+public final class PropertyDto implements Serializable {
 
   private final long id;
 
@@ -13,16 +14,16 @@ public final class PropertyDto {
 
   private final String title;
 
-  private final ZonedDateTime timestamp;
-
   private final Double value;
 
+  private final ZonedDateTime valueTimestamp;
+
   public PropertyDto(final Property property) {
     this.id = property.getId();
     this.name = property.getName();
     this.title = property.getTitle();
-    this.timestamp = property.getTimestamp();
     this.value = property.getValue();
+    this.valueTimestamp = property.getTimestamp();
   }
 
 }
diff --git a/src/main/java/de/ph87/homeautomation/property/PropertyReadService.java b/src/main/java/de/ph87/homeautomation/property/PropertyReadService.java
new file mode 100644
index 0000000..5f2d02e
--- /dev/null
+++ b/src/main/java/de/ph87/homeautomation/property/PropertyReadService.java
@@ -0,0 +1,37 @@
+package de.ph87.homeautomation.property;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+@Slf4j
+@Service
+@Transactional
+@RequiredArgsConstructor
+public class PropertyReadService {
+
+  private final PropertyRepository propertyRepository;
+
+  private final PropertyMapper propertyMapper;
+
+  public Property getByName(final String name) {
+    return propertyRepository.findByName(name).orElseThrow(RuntimeException::new);
+  }
+
+  public List<Property> findAllByReadChannel_Id(final long readChannelId) {
+    return propertyRepository.findAllByReadChannel_Id(readChannelId);
+  }
+
+  public List<PropertyDto> findAllDtoLike(final String like) {
+    return propertyRepository.findAllByNameLike(like).stream().map(propertyMapper::toDto).collect(Collectors.toList());
+  }
+
+  public PropertyDto getDtoByName(final String name) {
+    return propertyMapper.toDto(getByName(name));
+  }
+
+}
diff --git a/src/main/java/de/ph87/homeautomation/property/PropertyRepository.java b/src/main/java/de/ph87/homeautomation/property/PropertyRepository.java
index 5d1f13f..61449fa 100644
--- a/src/main/java/de/ph87/homeautomation/property/PropertyRepository.java
+++ b/src/main/java/de/ph87/homeautomation/property/PropertyRepository.java
@@ -2,10 +2,15 @@ package de.ph87.homeautomation.property;
 
 import org.springframework.data.repository.CrudRepository;
 
+import java.util.List;
 import java.util.Optional;
 
 public interface PropertyRepository extends CrudRepository<Property, Long> {
 
   Optional<Property> findByName(String name);
 
+  List<Property> findAllByReadChannel_Id(long readChannelId);
+
+  List<Property> findAllByNameLike(final String like);
+
 }
diff --git a/src/main/java/de/ph87/homeautomation/property/PropertyService.java b/src/main/java/de/ph87/homeautomation/property/PropertyService.java
deleted file mode 100644
index 6409c2f..0000000
--- a/src/main/java/de/ph87/homeautomation/property/PropertyService.java
+++ /dev/null
@@ -1,36 +0,0 @@
-package de.ph87.homeautomation.property;
-
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.springframework.context.ApplicationEventPublisher;
-import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
-
-import java.util.Optional;
-import java.util.Set;
-
-@Slf4j
-@Service
-@Transactional
-@RequiredArgsConstructor
-public class PropertyService {
-
-  private final Set<IPropertyOwner> owners;
-
-  private final PropertyRepository propertyRepository;
-
-  private final ApplicationEventPublisher applicationEventPublisher;
-
-  private final PropertyMapper propertyMapper;
-
-  public Optional<PropertyDto> find(final String name) {
-    return propertyRepository.findByName(name).map(propertyMapper::toDto);
-  }
-
-  public Optional<PropertyDto> set(final String name, final double value) {
-    final Optional<PropertyDto> propertyOptional = owners.stream().map(owner -> owner.write(name, value)).findFirst().map(propertyMapper::toDto);
-    propertyOptional.ifPresent(applicationEventPublisher::publishEvent);
-    return propertyOptional;
-  }
-
-}
diff --git a/src/main/java/de/ph87/homeautomation/property/PropertySetDto.java b/src/main/java/de/ph87/homeautomation/property/PropertySetDto.java
new file mode 100644
index 0000000..c82d90f
--- /dev/null
+++ b/src/main/java/de/ph87/homeautomation/property/PropertySetDto.java
@@ -0,0 +1,12 @@
+package de.ph87.homeautomation.property;
+
+import lombok.Data;
+
+@Data
+public class PropertySetDto {
+
+  private final String name;
+
+  private final double value;
+
+}
diff --git a/src/main/java/de/ph87/homeautomation/property/PropertyWriteService.java b/src/main/java/de/ph87/homeautomation/property/PropertyWriteService.java
new file mode 100644
index 0000000..c8c2461
--- /dev/null
+++ b/src/main/java/de/ph87/homeautomation/property/PropertyWriteService.java
@@ -0,0 +1,47 @@
+package de.ph87.homeautomation.property;
+
+import de.ph87.homeautomation.channel.ChannelChangedEvent;
+import de.ph87.homeautomation.channel.ChannelService;
+import de.ph87.homeautomation.web.WebSocketService;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.transaction.event.TransactionPhase;
+import org.springframework.transaction.event.TransactionalEventListener;
+
+@Slf4j
+@Service
+@Transactional
+@RequiredArgsConstructor
+public class PropertyWriteService {
+
+  private final PropertyReadService propertyReadService;
+
+  private final ChannelService channelService;
+
+  private final PropertyMapper propertyMapper;
+
+  private final WebSocketService webSocketService;
+
+  public void write(final String name, final double value) {
+    write(propertyReadService.getByName(name), value);
+  }
+
+  public void write(final Property property, final double value) {
+    channelService.write(property, value);
+  }
+
+  @TransactionalEventListener(phase = TransactionPhase.BEFORE_COMMIT)
+  public void channelChangedEventListener(final ChannelChangedEvent event) {
+    propertyReadService.findAllByReadChannel_Id(event.getChannelId())
+      .forEach(property -> {
+          property.setValue(property.getReadChannel().getValue());
+          property.setTimestamp(property.getReadChannel().getValueTimestamp());
+          log.debug("Updated Property from Channel: {}", property);
+          webSocketService.send(propertyMapper.toDto(property), true);
+        }
+      );
+  }
+
+}
diff --git a/src/main/java/de/ph87/homeautomation/property2/IPropertyOwner.java b/src/main/java/de/ph87/homeautomation/property2/IPropertyOwner.java
deleted file mode 100644
index 13ff289..0000000
--- a/src/main/java/de/ph87/homeautomation/property2/IPropertyOwner.java
+++ /dev/null
@@ -1,9 +0,0 @@
-package de.ph87.homeautomation.property2;
-
-public interface IPropertyOwner {
-
-  String getPropertyOwnerName();
-
-  Property write(final String name, final double value);
-
-}
diff --git a/src/main/java/de/ph87/homeautomation/property2/Property.java b/src/main/java/de/ph87/homeautomation/property2/Property.java
deleted file mode 100644
index 3d7f224..0000000
--- a/src/main/java/de/ph87/homeautomation/property2/Property.java
+++ /dev/null
@@ -1,35 +0,0 @@
-package de.ph87.homeautomation.property2;
-
-import lombok.AccessLevel;
-import lombok.Getter;
-import lombok.Setter;
-import lombok.ToString;
-
-import javax.persistence.Column;
-import javax.persistence.Entity;
-import javax.persistence.GeneratedValue;
-import javax.persistence.Id;
-import java.time.ZonedDateTime;
-
-@Getter
-@Setter
-@ToString
-@Entity
-public final class Property {
-
-  @Id
-  @GeneratedValue
-  @Setter(AccessLevel.NONE)
-  private Long id;
-
-  @Column(nullable = false, unique = true)
-  private String name;
-
-  @Column(unique = true)
-  private String title;
-
-  private ZonedDateTime timestamp;
-
-  private Double value;
-
-}
diff --git a/src/main/java/de/ph87/homeautomation/property2/PropertyOwnerValidatorService.java b/src/main/java/de/ph87/homeautomation/property2/PropertyOwnerValidatorService.java
deleted file mode 100644
index 43f9f74..0000000
--- a/src/main/java/de/ph87/homeautomation/property2/PropertyOwnerValidatorService.java
+++ /dev/null
@@ -1,44 +0,0 @@
-package de.ph87.homeautomation.property2;
-
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.springframework.stereotype.Service;
-
-import javax.annotation.PostConstruct;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.stream.Collectors;
-
-@Slf4j
-@Service
-@RequiredArgsConstructor
-public class PropertyOwnerValidatorService {
-
-  private final Set<IPropertyOwner> owners;
-
-  @PostConstruct
-  public void postConstruct() {
-    final Map<IPropertyOwner, List<IPropertyOwner>> overlapping = owners.stream().collect(Collectors.toMap(owner -> owner, this::getOverlappingList));
-    if (!overlapping.values().stream().allMatch(List::isEmpty)) {
-      throw new RuntimeException(
-        String.format(
-          "Following IPropertyOwners have overlapping names:\n\t%s",
-          overlapping.entrySet().stream()
-            .map(entry -> {
-              final String prefixClassName = entry.getKey().getClass().getCanonicalName();
-              final String prefixPropertyName = entry.getKey().getPropertyOwnerName();
-              final String overlappingList = entry.getValue().stream().map(owner -> owner.getClass().getCanonicalName() + "(" + owner.getPropertyOwnerName() + ")").collect(Collectors.joining("\n\t\t"));
-              return String.format("%s(%s):\n\t\t%s", prefixClassName, prefixPropertyName, overlappingList);
-            })
-            .collect(Collectors.joining("\n\t"))
-        )
-      );
-    }
-  }
-
-  private List<IPropertyOwner> getOverlappingList(final IPropertyOwner a) {
-    return owners.stream().filter(b -> b.getPropertyOwnerName().startsWith(a.getPropertyOwnerName())).collect(Collectors.toList());
-  }
-
-}
diff --git a/src/main/java/de/ph87/homeautomation/property2/PropertyRepository.java b/src/main/java/de/ph87/homeautomation/property2/PropertyRepository.java
deleted file mode 100644
index 955073e..0000000
--- a/src/main/java/de/ph87/homeautomation/property2/PropertyRepository.java
+++ /dev/null
@@ -1,11 +0,0 @@
-package de.ph87.homeautomation.property2;
-
-import org.springframework.data.repository.CrudRepository;
-
-import java.util.Optional;
-
-public interface PropertyRepository extends CrudRepository<Property, Long> {
-
-  Optional<Property> findByName(String name);
-
-}
diff --git a/src/main/java/de/ph87/homeautomation/property2/PropertyService.java b/src/main/java/de/ph87/homeautomation/property2/PropertyService.java
deleted file mode 100644
index 8a6701b..0000000
--- a/src/main/java/de/ph87/homeautomation/property2/PropertyService.java
+++ /dev/null
@@ -1,29 +0,0 @@
-package de.ph87.homeautomation.property2;
-
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
-
-import java.util.Optional;
-import java.util.Set;
-
-@Slf4j
-@Service
-@Transactional
-@RequiredArgsConstructor
-public class PropertyService {
-
-  private final Set<IPropertyOwner> owners;
-
-  private final PropertyRepository propertyRepository;
-
-  public Optional<Property> write(final String name, final double value) {
-    return owners.stream().map(owner -> owner.write(name, value)).findFirst();
-  }
-
-  public Optional<Property> read(final String name) {
-    return propertyRepository.findByName(name);
-  }
-
-}
diff --git a/src/main/java/de/ph87/homeautomation/schedule/Schedule.java b/src/main/java/de/ph87/homeautomation/schedule/Schedule.java
index 8f1374c..364e466 100644
--- a/src/main/java/de/ph87/homeautomation/schedule/Schedule.java
+++ b/src/main/java/de/ph87/homeautomation/schedule/Schedule.java
@@ -1,5 +1,6 @@
 package de.ph87.homeautomation.schedule;
 
+import de.ph87.homeautomation.property.Property;
 import de.ph87.homeautomation.schedule.entry.ScheduleEntry;
 import lombok.AccessLevel;
 import lombok.Getter;
@@ -26,11 +27,11 @@ public class Schedule {
   @Column(nullable = false, unique = true)
   private String title;
 
-  private String propertyName;
+  @ManyToOne
+  private Property property;
 
-  @Column(nullable = false)
   @Enumerated(EnumType.STRING)
-  private PropertyType propertyType = PropertyType.ON_OFF;
+  private SchedulePropertyType propertyType;
 
   @ToString.Exclude
   @OneToMany(cascade = CascadeType.ALL, orphanRemoval = true, fetch = FetchType.EAGER)
diff --git a/src/main/java/de/ph87/homeautomation/schedule/ScheduleController.java b/src/main/java/de/ph87/homeautomation/schedule/ScheduleController.java
index c2a9782..0fd1c4c 100644
--- a/src/main/java/de/ph87/homeautomation/schedule/ScheduleController.java
+++ b/src/main/java/de/ph87/homeautomation/schedule/ScheduleController.java
@@ -1,10 +1,13 @@
 package de.ph87.homeautomation.schedule;
 
+import de.ph87.homeautomation.property.PropertyReadService;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
 
+import static de.ph87.homeautomation.shared.Helpers.mapIfNotNull;
+
 @RestController
 @RequestMapping("schedule")
 @RequiredArgsConstructor
@@ -14,6 +17,8 @@ public class ScheduleController {
 
   private final ScheduleWriteService scheduleWriteService;
 
+  private final PropertyReadService propertyReadService;
+
   @GetMapping("findAll")
   public List<ScheduleDto> findAll() {
     return scheduleReadService.findAllDtos();
@@ -39,19 +44,19 @@ public class ScheduleController {
     return scheduleWriteService.set(id, Schedule::setEnabled, enabled);
   }
 
-  @PostMapping("set/{id}/name")
-  public ScheduleDto setName(@PathVariable final long id, @RequestBody final String name) {
-    return scheduleWriteService.set(id, Schedule::setTitle, name);
+  @PostMapping("set/{id}/title")
+  public ScheduleDto setTitle(@PathVariable final long id, @RequestBody final String title) {
+    return scheduleWriteService.set(id, Schedule::setTitle, title);
   }
 
   @PostMapping("set/{id}/propertyName")
-  public ScheduleDto setPropertyName(@PathVariable final long id, @RequestBody final String propertyName) {
-    return scheduleWriteService.set(id, Schedule::setPropertyName, propertyName);
+  public ScheduleDto setPropertyName(@PathVariable final long id, @RequestBody(required = false) final String propertyName) {
+    return scheduleWriteService.set(id, (schedule, v) -> schedule.setProperty(mapIfNotNull(v, propertyReadService::getByName)), propertyName);
   }
 
   @PostMapping("set/{id}/propertyType")
   public ScheduleDto setPropertyType(@PathVariable final long id, @RequestBody final String propertyType) {
-    return scheduleWriteService.set(id, Schedule::setPropertyType, PropertyType.valueOf(propertyType));
+    return scheduleWriteService.set(id, Schedule::setPropertyType, SchedulePropertyType.valueOf(propertyType));
   }
 
 }
diff --git a/src/main/java/de/ph87/homeautomation/schedule/ScheduleDto.java b/src/main/java/de/ph87/homeautomation/schedule/ScheduleDto.java
index fd3c64c..9bd9a02 100644
--- a/src/main/java/de/ph87/homeautomation/schedule/ScheduleDto.java
+++ b/src/main/java/de/ph87/homeautomation/schedule/ScheduleDto.java
@@ -1,11 +1,14 @@
 package de.ph87.homeautomation.schedule;
 
+import de.ph87.homeautomation.property.Property;
 import de.ph87.homeautomation.schedule.entry.ScheduleEntryDto;
 import lombok.Getter;
 
 import java.util.Set;
 import java.util.stream.Collectors;
 
+import static de.ph87.homeautomation.shared.Helpers.mapIfNotNull;
+
 @Getter
 public class ScheduleDto {
 
@@ -17,7 +20,7 @@ public class ScheduleDto {
 
   public final String propertyName;
 
-  public final PropertyType propertyType;
+  public final SchedulePropertyType propertyType;
 
   public final Set<ScheduleEntryDto> entries;
 
@@ -25,7 +28,7 @@ public class ScheduleDto {
     this.id = schedule.getId();
     this.enabled = schedule.isEnabled();
     this.title = schedule.getTitle();
-    this.propertyName = schedule.getPropertyName();
+    this.propertyName = mapIfNotNull(schedule.getProperty(), Property::getName);
     this.propertyType = schedule.getPropertyType();
     this.entries = schedule.getEntries().stream().map(ScheduleEntryDto::new).collect(Collectors.toSet());
   }
diff --git a/src/main/java/de/ph87/homeautomation/schedule/ScheduleExecutionService.java b/src/main/java/de/ph87/homeautomation/schedule/ScheduleExecutionService.java
index 8e0d94b..eac9e01 100644
--- a/src/main/java/de/ph87/homeautomation/schedule/ScheduleExecutionService.java
+++ b/src/main/java/de/ph87/homeautomation/schedule/ScheduleExecutionService.java
@@ -1,7 +1,6 @@
 package de.ph87.homeautomation.schedule;
 
-import de.ph87.homeautomation.property.PropertyService;
-import de.ph87.homeautomation.property.PropertySetException;
+import de.ph87.homeautomation.property.PropertyWriteService;
 import de.ph87.homeautomation.schedule.entry.ScheduleEntry;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -21,7 +20,7 @@ public class ScheduleExecutionService {
 
   private final ScheduleCalculationService scheduleCalculationService;
 
-  private final PropertyService propertyService;
+  private final PropertyWriteService propertyWriteService;
 
   public void executeAllLastDue() {
     final ZonedDateTime now = ZonedDateTime.now();
@@ -29,7 +28,7 @@ public class ScheduleExecutionService {
   }
 
   private void executeLastDue(final Schedule schedule, final ZonedDateTime now) {
-    if (schedule.getPropertyName() == null || schedule.getPropertyName().isEmpty()) {
+    if (schedule.getProperty() == null) {
       log.error("Cannot execute Schedule {}: No property set!", schedule);
       return;
     }
@@ -42,11 +41,7 @@ public class ScheduleExecutionService {
   private void executeEntry(final Schedule schedule, final ScheduleEntry entry, final ZonedDateTime now) {
     entry.setLastClearTimestamp(entry.getNextClearTimestamp());
     log.info("Executing Schedule \"{}\" Entry {}", schedule.getTitle(), entry);
-    try {
-      propertyService.set(schedule.getPropertyName(), entry.getValue());
-    } catch (PropertySetException e) {
-      log.error(e.getMessage());
-    }
+    propertyWriteService.write(schedule.getProperty(), entry.getValue());
     scheduleCalculationService.calculateSchedule(schedule, now);
   }
 
diff --git a/src/main/java/de/ph87/homeautomation/schedule/SchedulePropertyType.java b/src/main/java/de/ph87/homeautomation/schedule/SchedulePropertyType.java
new file mode 100644
index 0000000..5b19e38
--- /dev/null
+++ b/src/main/java/de/ph87/homeautomation/schedule/SchedulePropertyType.java
@@ -0,0 +1,5 @@
+package de.ph87.homeautomation.schedule;
+
+public enum SchedulePropertyType {
+  SWITCH, PERCENT, SHUTTER, SCENE
+}
diff --git a/src/test/java/GroupAddressTranslatorTest.java b/src/test/java/GroupAddressTranslatorTest.java
deleted file mode 100644
index 9054e14..0000000
--- a/src/test/java/GroupAddressTranslatorTest.java
+++ /dev/null
@@ -1,17 +0,0 @@
-import org.junit.jupiter.api.Test;
-import tuwien.auto.calimero.GroupAddress;
-
-public class GroupAddressTranslatorTest {
-
-  @Test
-  public void test() {
-    getPrintln(1048);
-    getPrintln(771);
-    getPrintln(1293);
-  }
-
-  private void getPrintln(final int i) {
-    System.out.printf("%d: %s\n", i, new GroupAddress(i));
-  }
-
-}