diff --git a/equipmentMgr.js b/equipmentMgr.js
new file mode 100644
index 0000000..8a70be2
--- /dev/null
+++ b/equipmentMgr.js
@@ -0,0 +1,34 @@
+console.loggerName = 'js.equipmentMgr';
+console.log('Load equipmentMgr');
+
+const {
+    equipment,
+    watch
+} = require('../utils');
+
+
+const eMgr = new Object();
+
+for (let equipmentItem of items.getItems().filter(element => { return element.semantics.isEquipment })) {
+//for (let equipmentItem of items.getItems().filter(element => { return (element.semantics.isEquipment == true) && (element.semantics.equipment == null) })) {
+    // Fetch equipment type
+    let equipmentType = equipmentItem.tags.filter(element => Object.keys(equipment).includes(element));
+    if (equipmentType.length > 1) {
+        equipmentType.splice(equipmentType.indexOf('Equipment'), 1);
+    }
+
+    // Initialize equipment class
+    eMgr[equipmentItem.name] = new equipment[equipmentType](equipmentItem);
+}
+
+cache.shared.put('eMgr', eMgr);
+
+require('@runtime').lifecycleTracker.addDisposeHook(() => {
+    console.log('Deinitialization of equipmentMgr');
+
+    for (let equipmentItemName of Object.keys(eMgr)) {
+        eMgr[equipmentItemName].gc();
+    }
+});
+
+
diff --git a/utils/equipment.js b/utils/equipment.js
new file mode 100644
index 0000000..ac685a7
--- /dev/null
+++ b/utils/equipment.js
@@ -0,0 +1,67 @@
+console.loggerName = 'js.equipment';
+console.log('Load equipment modules');
+
+class Equipment {
+    constructor(equipmentItem) {
+        console.info('Initialization of eqipment ' + equipmentItem.name + ' with type ' + this.constructor.name);
+
+        // Set equipmentItem
+        this.equipmentItem = equipmentItem;
+
+        // Set stateItem, toDo: error when no stateItem existing
+        this.stateItem = items.getItem(this.equipmentItem.name + '_State');
+
+        // Initialization of properties
+        this.name = this.equipmentItem.name;
+        this.watch = new Object();
+    }
+
+    gc() {
+        console.log('Denitialization of eqipment ' + this.name);
+
+        // Delete all watchObjects
+        for (let watchItem of Object.keys(this.watch)) {
+            this.watch[watchItem].deleteAll();
+        }
+    }
+}
+
+class Irrigation extends Equipment {
+    constructor(equipmentItem) {
+        super(equipmentItem);
+    }
+}
+
+class IrrigationValve extends Equipment {
+    constructor(equipmentItem) {
+        super(equipmentItem);
+
+        this.watch['state'] = new watch.Watch(this.stateItem.name);
+        this.autoOff = this.watch['state'].add({
+            targetState: 'ON', 
+            alertFunc: () => { this.stateItem.sendCommand('OFF'); },
+            alertDelay: 'PT1M'
+        });
+    }
+}
+
+
+class TowelRadiator extends Equipment {
+    constructor(equipmentItem) {
+        super(equipmentItem);
+
+        this.watch['state'] = new watch.Watch(this.stateItem.name);
+        this.autoOff = this.watch['state'].add({
+            targetState: 'ON', 
+            alertFunc: () => { this.stateItem.sendCommand('OFF'); },
+            alertDelay: 'PT30M'
+        });
+    }
+}
+
+module.exports = {
+    Equipment,
+    Irrigation,
+    IrrigationValve,
+    TowelRadiator
+};
diff --git a/utils/index.js b/utils/index.js
new file mode 100644
index 0000000..5eaab4b
--- /dev/null
+++ b/utils/index.js
@@ -0,0 +1,7 @@
+console.loggerName = 'js.utils';
+console.log('Load utils')
+
+module.exports = {
+    get equipment() { return require('./equipment') },
+    get watch() { return require('./watch') },
+}
\ No newline at end of file
diff --git a/utils/watch.js b/utils/watch.js
new file mode 100644
index 0000000..809f64f
--- /dev/null
+++ b/utils/watch.js
@@ -0,0 +1,288 @@
+console.loggerName = 'js.watch';
+console.log('Load watch module');
+
+class Watch {
+
+    #item
+    #watchItemName
+    #watchObjects = new Object();
+
+    constructor(itemName) {
+        console.log('Create new Watch instance for ' + itemName);
+        
+        // Check if item to watch is existing
+        this.#item = items.getItem(itemName, true);
+        if (this.#item == null) {
+            throw('Item ' + itemName + ' not existing');
+        }
+        this.#watchItemName = itemName;
+
+        // Create watch rule
+        this.#createWatchRule();
+    }
+
+    add(params) {
+        // Generate watchUUID
+        let watchUUID = utils.randomUUID();
+
+        // Validate config for watchObject
+        if (!this.validateWatchConfig(params)) {
+            console.warn('Failed to add watch object for ' + this.#watchItemName + ' because no valid config was provided');
+            return;
+        }
+
+        // Set default values if no config provided
+        let operator = (params['operator'] !== undefined) ? params['operator'] : '==';
+
+        // Create watch object and return UUID
+        console.log('Add watch object for item ' + this.#watchItemName + ' with state ' + params['targetState'] + ' and operator ' + operator + ' with UUID ' + watchUUID);
+        this.#watchObjects[watchUUID] = {
+            targetState: this.#stateToValue(params['targetState']),
+            operator: operator,
+            alertFunc: params['alertFunc'],
+            alertDelay: (params['alertDelay'] !== undefined) ? params['alertDelay'] : 0,
+            alertRepeat: (params['alertRepeat'] !== undefined) ? params['alertRepeat'] : 0,
+            initialAlertFunc: (params['initialAlertFunc'] !== undefined) ? params['initialAlertFunc'] : '',
+            endAlertFunc: (params['endAlertFunc'] !== undefined) ? params['endAlertFunc'] : '',
+            hysteresis: (params['hysteresis'] !== undefined) ? this.#stateToValue(params['hysteresis']) : '',
+            alert: false
+        }
+
+        // Check if watchObject is already triggered by currentState 
+        this.#checkAlertState(watchUUID);
+
+        // return id of watchObject
+        return watchUUID;
+    }
+
+    delete(watchUUID) {
+        console.log('Delete watch object for item ' + this.#watchItemName + ' with watchUUID ' + watchUUID);
+
+        // End repeatAlertTimer if existing
+        if (this.#watchObjects[watchUUID].hasOwnProperty('repeatAlertTimer') && this.#watchObjects[watchUUID].repeatAlertTimer.isActive()) {
+            console.log('Cancel repeatAlertTimer for ' + watchUUID);
+            this.#watchObjects[watchUUID].repeatAlertTimer.cancel();
+        }
+        
+        // End startAlertTimer if existing
+        if (this.#watchObjects[watchUUID].hasOwnProperty('startAlertTimer') && this.#watchObjects[watchUUID].startAlertTimer.isActive()) {
+            console.log('Cancel startAlertTimer for ' + watchUUID);
+            this.#watchObjects[watchUUID].startAlertTimer.cancel();
+        }
+
+        delete this.#watchObjects[watchUUID];
+    }
+
+    deleteAll() {
+        for (let watchUUID of Object.keys(this.#watchObjects)) {
+            this.delete(watchUUID);
+        }
+    }
+
+    validateWatchConfig(params) {
+
+        if (params['targetState'] === undefined) {
+            console.error('No targetState set');
+            return false;
+        }
+        if (params['alertFunc'] === undefined) {
+            console.error('No alertFunc set');
+            return false;
+        }
+
+        // return true if config is valid
+        return true
+    }
+
+    #applyHysteresis(currentState, targetState, hysteresis) {
+        console.log('Applying hysteresis with: ' + currentState + ', ' + targetState + ', ' + hysteresis);
+        let delta = Math.abs(targetState - currentState);
+        console.log(delta);
+
+        if (delta < hysteresis) {
+            return false;
+        }
+
+        return true;
+    }
+
+    #checkAlertState(watchUUID) {
+        let currentState = this.#stateToValue(this.#item.state);
+
+        // Do comparison
+        if (this.#compare(currentState, this.#watchObjects[watchUUID].targetState, this.#watchObjects[watchUUID].operator)) { // Comparison successful
+            console.log('State ' + currentState + ' is ' + this.#watchObjects[watchUUID].operator + ' ' + this.#watchObjects[watchUUID].targetState + ' triggered by ' + watchUUID);
+            if (this.#watchObjects[watchUUID].alert == true) { // Comparison successful and alert is already active
+                this.#rescheduleAlert(watchUUID);
+            } else { // Comparison successful and alert is not active
+                // Start alert
+                this.#startAlert(watchUUID);
+            }
+        } else if (this.#watchObjects[watchUUID].alert == true) { // Comparison failed but alert is active
+            // Skip if currentState fails hysteresis test
+            if (this.#watchObjects[watchUUID].hysteresis != '' && !this.#applyHysteresis(currentState, this.#watchObjects[watchUUID].targetState, this.#watchObjects[watchUUID].hysteresis)) {
+                console.log('CurrentState is still in boundaries provided by hysteresis value');
+                return;
+            }
+            // End alert
+            this.#endAlert(watchUUID);
+        }
+    }
+
+    #compare(a, b, operator) {
+
+        // Hint: a = currentState, b = targetState
+
+        switch (operator) {
+            case '==':
+                return (a == b);
+                break;
+            case '!=':
+                return !(a == b);
+                break;
+            case '>':
+                return (a > b);
+                break;
+            case '<':
+                return (a < b);
+                break;
+        }
+    }
+
+    #createWatchRule() {
+        // Create openHAB rule
+        console.log('Create openHAB watch rule for item ' + this.#watchItemName);
+        let ruleID = rules.JSRule({
+            name: 'Watch rule for ' + this.#watchItemName,
+            triggers: [triggers.ItemStateChangeTrigger(this.#watchItemName)],
+            execute: (event) => { this.#processStateChange(event) },
+        });
+    }
+
+    #endAlert(watchUUID) {
+        console.log('End alert for watchObject ' + watchUUID + ' triggered');
+        this.#watchObjects[watchUUID].alert = false;
+
+        // Run end alert function if existing
+        if (this.#watchObjects[watchUUID]. endAlertFunc != '') {
+            console.log('Run end alert function for watchObject ' + watchUUID);
+            this.#watchObjects[watchUUID]. endAlertFunc();
+        }
+
+        // End repeatAlertTimer if existing
+        if (this.#watchObjects[watchUUID].hasOwnProperty('repeatAlertTimer') && this.#watchObjects[watchUUID].repeatAlertTimer.isActive()) {
+            console.log('Cancel repeatAlertTimer');
+            this.#watchObjects[watchUUID].repeatAlertTimer.cancel();
+        }
+        
+        // End startAlertTimer if startAlert started timer with delay
+        if (this.#watchObjects[watchUUID].startAlertTimer.isActive()) {
+            console.log('Cancel startAlertTimer');
+            this.#watchObjects[watchUUID].startAlertTimer.cancel();
+        }
+    }
+
+    #processStateChange(event) {
+        // Skip if function is triggered without openHAB event
+        if (event === undefined || event.eventType === undefined) {
+            console.warn('ProcessStateChange triggered without openHAB event');
+            return;
+        }
+
+        console.log('Processing state ' + this.#item.state + ' for ' + this.#watchItemName);
+
+        // Iterate through watchObjetcs // todo: rework to only fetch UUID
+        for (let [watchUUID, watchObject] of Object.entries(this.#watchObjects)) {
+            this.#checkAlertState(watchUUID);
+        }
+    }
+
+    #rescheduleAlert(watchUUID) {
+        console.log('Subsequent alert for ' + watchUUID);
+    }
+
+    #startAlert(watchUUID) {
+        console.log('Initial alert for watchObject ' + watchUUID + ' triggered');
+
+        // Set alertFunc as inital alert function if no  initialAlertFunc is set
+        let initialAlertFunc = this.#watchObjects[watchUUID].alertFunc;
+        if (this.#watchObjects[watchUUID].initialAlertFunc != '') {
+            initialAlertFunc = this.#watchObjects[watchUUID].initialAlertFunc;
+        } 
+
+        // Create timer to run initial alert rule
+        this.#watchObjects[watchUUID].alert = true;
+        this.#watchObjects[watchUUID].startAlertTimer = actions.ScriptExecution.createTimer('startAlert ' + watchUUID,
+                                                                                            time.toZDT(this.#watchObjects[watchUUID].alertDelay),
+                                                                                            () => {
+                                                                                                console.log('Run initial alert function for watchObject ' + watchUUID);
+                                                                                                initialAlertFunc();
+                                                                                            }
+
+        );
+
+        // Create timer to run repeat alert rule if required
+        if (this.#watchObjects[watchUUID].alertRepeat != '') {
+            console.log('wiederholter alert notwendig');
+            this.#watchObjects[watchUUID].repeatAlertTimer = actions.ScriptExecution.createTimer('repeatAlarm ' + watchUUID,
+                                                                                                time.toZDT(this.#watchObjects[watchUUID].alertDelay + this.#watchObjects[watchUUID].alertRepeat),
+                                                                                                () => {
+                                                                                                    console.log('Run repeat alert function for watchObject ' + watchUUID);
+                                                                                                    this.#watchObjects[watchUUID].alertFunc();
+                                                                                                    this.#watchObjects[watchUUID].repeatAlertTimer.reschedule(time.ZonedDateTime.now().plusSeconds(this.#watchObjects[watchUUID].alertRepeat));
+                                                                                                }
+
+            );
+        }
+    } 
+
+    #stateToValue(state) {
+        console.log('Converting value ' + state + ' of type ' + typeof state);
+        if(typeof state === 'string') {
+            if(state.includes(' ')) {
+                try {
+                    console.log('Quantity: ' + state);
+                    return Quantity(state)
+                } catch(e) {
+                    // do nothing, leave it as a String
+                    console.log('Not a Quantity but has a space, leaving as a string: ' + state);
+                    return state;
+                }
+          }
+          else if(!isNaN(state)) {
+                console.log('Number: ' + state)
+                return Number.parseFloat(state);
+          }
+          else if(state == 'UnDefType' || state == 'NULL' || state == 'UNDEF') {
+                console.log('UnDefType: ' + state);
+                return 'UnDefType';
+          }
+          console.log('String: ' + state);
+          return state;
+        }
+        else if(state instanceof DecimalType || state instanceof PercentType) {
+            console.log('DecimalType or PercentType: ' + state);
+            return state.floatValue();
+        }
+        else if(state instanceof QuantityType) {
+            console.log('QuantityType: ' + state);
+            return Quantity(state);
+        }
+        else {
+            console.log('String: ' + state);
+            return state.toString();
+        }
+    }
+}
+
+module.exports = {
+    Watch,
+};
+
+/*
+let test = new Watch('GB_TowelRadiator_State');
+test.add({
+    targetState: 'OFF', 
+    alertFunc: () => { console.log('Alle Achtung!'); },
+});
+*/
\ No newline at end of file