diff --git a/main.js b/main.js
index c459435..4f3e0e8 100644
--- a/main.js
+++ b/main.js
@@ -61,6 +61,8 @@ You can define the same variable name inside a child without produce a conflict
 
 let variable = 1234;
 let objects    = {};
+let enums      = {};
+
 
 
 // is called when adapter shuts down - callback has to be called under any circumstances!
@@ -245,6 +247,115 @@ function pollData() {
 }
 
 
+
+function addToEnum(enumName, id, callback) {
+    adapter.getForeignObject(enumName, function (err, obj) {
+        if (!err && obj) {
+            let pos = obj.common.members.indexOf(id);
+            if (pos === -1) {
+                obj.common.members.push(id);
+                adapter.setForeignObject(obj._id, obj, function (err) {
+                    if (callback) callback(err);
+                });
+            } else {
+                if (callback) callback(err);
+            }
+        } else {
+            if (callback) callback(err);
+        }
+    });
+}
+
+function removeFromEnum(enumName, id, callback) {
+    adapter.getForeignObject(enumName, function (err, obj) {
+        if (!err && obj) {
+            let pos = obj.common.members.indexOf(id);
+            if (pos !== -1) {
+                obj.common.members.splice(pos, 1);
+                adapter.setForeignObject(obj._id, obj, function (err) {
+                    if (callback) callback(err);
+                });
+            } else {
+                if (callback) callback(err);
+            }
+        } else {
+            if (callback) callback(err);
+        }
+    });
+}
+
+function syncEnums(enumGroup, id, newEnumName, callback) {
+    if (!enums[enumGroup]) {
+        adapter.getEnum(enumGroup, function (err, _enums) {
+            enums[enumGroup] = _enums;
+            syncEnums(enumGroup, id, newEnumName, callback);
+        });
+        return;
+    }
+
+    // try to find this id in enums
+    let found = false;
+    let count = 0;
+    for (let e in enums[enumGroup]) {
+        if (enums[enumGroup].hasOwnProperty(e) &&
+            enums[enumGroup][e].common &&
+            enums[enumGroup][e].common.members &&
+            enums[enumGroup][e].common.members.indexOf(id) !== -1) {
+            if (enums[enumGroup][e]._id !== newEnumName) {
+                count++;
+                removeFromEnum(enums[enumGroup][e]._id, id, function () {
+                    if (!--count && typeof callback === 'function') callback();
+                });
+            } else {
+                found = true;
+            }
+        }
+    }
+    if (!found && newEnumName) {
+        count++;
+        addToEnum(newEnumName, id, function () {
+            if (!--count&& typeof callback === 'function') callback();
+        });
+    }
+
+    if (!count && typeof callback === 'function') callback();
+}
+
+
+function createExtendObject(id, objData, callback) {
+    adapter.getObject(id, function (err, oldObj) {
+        if (!err && oldObj) {
+            adapter.extendObject(id, objData, callback);
+        } else {
+            adapter.setObjectNotExists(id, objData, callback);
+        }
+    });
+}
+
+function processTasks(tasks, callback) {
+    if (!tasks || !tasks.length) {
+        if (typeof callback === 'function') callback();
+        return;
+    }
+    let task = tasks.shift();
+    if (task.name === 'add') {
+        createExtendObject(task.id, task.obj, function () {
+            setTimeout(processTasks, 0, tasks, callback);
+        });
+    } else if (task.name === 'del') {
+        adapter.delObject(task.id, function () {
+            setTimeout(processTasks, 0, tasks, callback);
+        });
+    } else if (task.name === 'syncEnums') {
+        syncEnums('rooms', task.id, task.obj, function () {
+            setTimeout(processTasks, 0, tasks, callback);
+        });
+    } else {
+        throw 'Unknown task';
+    }
+}
+
+
 function checkDeviceIds(options, config, deviceIds) {
     
     for (let i = config.length - 1; i >= 0; i--) {