diff --git a/src/app/main.cpp b/src/app/main.cpp
index 0b96c6a..61f2151 100644
--- a/src/app/main.cpp
+++ b/src/app/main.cpp
@@ -8,6 +8,7 @@
 
 #include "../colnod/colnodapi.h"
 #include "../colnod/syncmanager.h"
+#include "../colnod/logutils.h"
 
 int main(int argc, char *argv[])
 {
@@ -29,7 +30,9 @@ int main(int argc, char *argv[])
 
 
     // Logger initializiaton
-    serversdk::initAppLogger();
+//    serversdk::initAppLogger();
+
+    LogUtils::initLogger(false);
 
     // Log messge Filtering
     QStringList filters;
@@ -47,11 +50,14 @@ int main(int argc, char *argv[])
         return -1;
     }
 
+    syncManager.init();
+
+    QCoreApplication::connect(&syncManager, &SyncManager::end, [&]{
+        QTimer::singleShot(300000, &syncManager, &SyncManager::startSynchronization);
+    });
+
     // Synchronizaiton
-    if (!syncManager.startSynchronization()) {
-        qCritical() << "Not possible to start synchronization";
-        return -1;
-    }
+    syncManager.startSynchronization();
 
     return QCoreApplication::exec();
 }
diff --git a/src/colnod/colnod.pri b/src/colnod/colnod.pri
index 63362c5..1e23f2a 100644
--- a/src/colnod/colnod.pri
+++ b/src/colnod/colnod.pri
@@ -9,7 +9,8 @@ SOURCES += \
     $$PWD/databaseapi.cpp \
     $$PWD/subject.cpp \
     $$PWD/syncmanager.cpp \
-    $$PWD/token.cpp
+    $$PWD/token.cpp \
+    $$PWD/logutils.cpp
 
 HEADERS += \
     $$PWD/colnodapi.h \
@@ -17,6 +18,7 @@ HEADERS += \
     $$PWD/databaseapi.h \
     $$PWD/subject.h \
     $$PWD/syncmanager.h \
-    $$PWD/token.h
+    $$PWD/token.h \
+    $$PWD/logutils.h
 
 include(../../server-sdk/serversdk.pri)
diff --git a/src/colnod/colnodapi.cpp b/src/colnod/colnodapi.cpp
index e046f17..c324ac1 100644
--- a/src/colnod/colnodapi.cpp
+++ b/src/colnod/colnodapi.cpp
@@ -155,8 +155,9 @@ bool ColnodAPI::downloadData(const qint64 &time)
     return true;
 }
 
-void ColnodAPI::processData(const std::shared_ptr<Data> &data)
+void ColnodAPI::processData(const std::shared_ptr<PreparedData> &prepdata)
 {
+    auto data = prepdata->databaseData;
     // emit signal when finished
     auto checkData = [=]() {
         int dataCount = data->incrementCounter();
@@ -185,7 +186,7 @@ void ColnodAPI::processData(const std::shared_ptr<Data> &data)
                     !data->updatedSubjects.isEmpty() || !data->deletedSubjects.isEmpty()) {
                 qInfo(colnod) << dash;
             }
-            emit dataProcessFinished(mValid);
+            emit dataProcessFinished(mValid, prepdata);
         }
     };
 
diff --git a/src/colnod/colnodapi.h b/src/colnod/colnodapi.h
index 0687994..7510a44 100644
--- a/src/colnod/colnodapi.h
+++ b/src/colnod/colnodapi.h
@@ -72,7 +72,7 @@ public:
      * @brief Push all data prepare during synchronization to Colnod
      * @param data Data which are pushing to Colnod
      */
-    void processData(const std::shared_ptr<Data> &data);
+    void processData(const std::shared_ptr<PreparedData> &prepdata);
 
     /**
      * @brief Endpoint of Colnod API
@@ -124,7 +124,7 @@ signals:
      * @brief Signal which transfer data to Sync Manager
      */
     void downloadDataFinished(std::shared_ptr<Data> = std::shared_ptr<Data>());
-    void dataProcessFinished(bool success = true);
+    void dataProcessFinished(bool success = true, std::shared_ptr<PreparedData> = nullptr);
     void authTokenUpdated(bool success);
 
 private:
diff --git a/src/colnod/databaseapi.cpp b/src/colnod/databaseapi.cpp
index d5f617a..681e941 100644
--- a/src/colnod/databaseapi.cpp
+++ b/src/colnod/databaseapi.cpp
@@ -326,3 +326,7 @@ QString DatabaseAPI::getSubjectNameByTokenId(const QString &tokenId)
     qWarning() << "Token:" << tokenId << "is not assigned to any subject";
     return "(No subject)";
 }
+
+bool DatabaseAPI::isOpen() {
+    return mDbMan->isOpen();
+}
diff --git a/src/colnod/databaseapi.h b/src/colnod/databaseapi.h
index 1c79d72..2e1bc9d 100644
--- a/src/colnod/databaseapi.h
+++ b/src/colnod/databaseapi.h
@@ -106,6 +106,7 @@ public:
      * @brief Check if this sync was without any problem
      */
     bool isValid();
+    bool isOpen();
 
     // Helper functions for naming new tokens
     qint16 getNumOfTokensOfSubject(const QString &id);
diff --git a/src/colnod/logutils.cpp b/src/colnod/logutils.cpp
new file mode 100644
index 0000000..8d4e7df
--- /dev/null
+++ b/src/colnod/logutils.cpp
@@ -0,0 +1,97 @@
+#include "logutils.h"
+
+namespace LogUtils{
+
+static bool verbose;
+
+void initLogger(bool vb)
+{
+    verbose = vb;
+    if (!QDir(logFolderName).exists()) {
+        QDir().mkdir(logFolderName);
+    }
+
+    deleteOldLogs();
+    initLogFileName();
+
+    QFile outFile(logFileName);
+    if (outFile.open(QIODevice::WriteOnly | QIODevice::Append))
+    {
+        qInstallMessageHandler(myMessageHandler);
+    } else {
+        qWarning() << "Cannot open log file.";
+    }
+}
+
+void myMessageHandler(QtMsgType type, const QMessageLogContext &context, const QString &msg)
+{
+    QFile outFileCheck(logFileName);
+    QFileInfo fileInfo(outFileCheck);
+    if (fileInfo.created().date() < QDateTime::currentDateTime().date()) {
+        QFile logFile(logFileName);
+        logFile.close();
+        deleteOldLogs();
+        initLogFileName();
+    }
+    QByteArray localMsg = msg.toLocal8Bit();
+    QString fileString(context.file);
+    fileString = fileString.mid(fileString.lastIndexOf("\\")+1);
+    auto date = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss.zzz");
+    QString txt;
+    switch (type) {
+    case QtDebugMsg:
+        if (verbose)
+            txt = date + " | " + QString("DEBUG").leftJustified(8,' ') + " | " + localMsg;
+        break;
+    case QtInfoMsg:
+        txt = date + " | " + QString("INFO").leftJustified(8,' ') + " | " + localMsg;
+        break;
+    case QtWarningMsg:
+        txt = date + " | " + QString("WARNING").leftJustified(8,' ') + " | " + QString(fileString + ':' + QString::number(context.line)).rightJustified(19, ' ') + " | " + localMsg;
+        break;
+    case QtCriticalMsg:
+        txt = date + " | " + QString("CRITICAL").leftJustified(8,' ') + " | " + QString(fileString + ':' + QString::number(context.line)).rightJustified(19, ' ') + " | " + localMsg;
+        break;
+    case QtFatalMsg:
+        txt = date + " | " + QString("FATAL").leftJustified(8,' ') + " | " + QString(fileString + ':' + QString::number(context.line)).rightJustified(19, ' ') + " | " + localMsg;
+        abort();
+    }
+    if (!txt.isEmpty()) {
+        QFile outFile(logFileName);
+        outFile.open(QIODevice::WriteOnly | QIODevice::Append);
+        QTextStream textStream(&outFile);
+        if (!txt.isEmpty()) textStream << txt << endl;
+    }
+}
+
+void deleteOldLogs(int days)
+{
+    auto today = QDateTime::currentDateTime();
+    QDir dir;
+    dir.setFilter(QDir::Files);
+    dir.setSorting(QDir::Time | QDir::Reversed);
+    dir.setPath(logFolderName);
+    auto filesInfo = dir.entryInfoList();
+    int i = 0;
+    if (!filesInfo.isEmpty()) {
+        while (filesInfo[i].created().daysTo(today) > days) {
+            QString path = filesInfo[i++].absoluteFilePath();
+            QFile file(path);
+            file.remove();
+            qDebug() << "File:" << path << "has been deleted!";
+        }
+    }
+}
+
+void initLogFileName()
+{
+    logFileName = QString(logFolderName + "/log_%1.txt").arg(QDate::currentDate().toString("yyyy_MM_dd"));
+}
+
+void setLogFolder(QString path)
+{
+    logFolderName = path;
+}
+
+
+}
diff --git a/src/colnod/logutils.h b/src/colnod/logutils.h
new file mode 100644
index 0000000..9ceed9d
--- /dev/null
+++ b/src/colnod/logutils.h
@@ -0,0 +1,25 @@
+#pragma once
+
+#include <QByteArray>
+#include <QString>
+#include <QDateTime>
+#include <QDate>
+#include <QDebug>
+#include <QDir>
+
+namespace LogUtils
+{
+    void initLogger(bool vb = false);
+    void myMessageHandler(QtMsgType type, const QMessageLogContext &context, const QString &msg);
+    void deleteOldLogs(int days = 90);
+    void initLogFileName();
+    void setLogFolder(QString path);
+
+    static QString logFileName;
+
+    static QString logFolderName = "/var/spaceti/log/colnod";
+
+    //static constexpr int logSize = 1024 * 0;
+    //static constexpr int logFileCount = 0;
+};
+
diff --git a/src/colnod/syncmanager.cpp b/src/colnod/syncmanager.cpp
index 1b71153..c788fe4 100644
--- a/src/colnod/syncmanager.cpp
+++ b/src/colnod/syncmanager.cpp
@@ -20,122 +20,162 @@ bool SyncManager::databaseInitialization()
         return false;
     }
 
-    // Get last synchronizaiton date
-    qint64 lastsync_in_ms = database->getLastSync();
-    if (lastsync_in_ms == -1) {
-        qCritical(syncmanager) << "Not possible to get last synchronization date";
-        return false;
-    }
 
-    // here -> nothing can fail
-    mlastSync.setTimestamp(lastsync_in_ms);
+
     colnod = std::make_shared<ColnodAPI>(&reqMan, mDryMode);
     return true;
 }
 
 
-bool SyncManager::startSynchronization()
-{
-    // Need current time from db server
-    qint64 syncBegin = database->getNow();
-    if (syncBegin == -1) {
-        qCritical(syncmanager) << "Not possible to get last sync date";
-        return false;
-    }
 
-    qInfo(syncmanager) << tab << "- begin sync ( previous sync" << mlastSync.toDateString() << ")";
+void SyncManager::init() {
 
-    // GETTING DATA FROM DATABASE
-    auto databaseData = database->downloadData();
-    if (!databaseData) {
-        qCritical(syncmanager) << "not possible to get data from database";
-        return false;
-    }
-    // NOW I HAVE DATA FROM DATABASE
-
-    colnod->downloadData(mlastSync.timestamp());
+//    qint64 begin = syncBegin;
     connect(colnod.get(), &ColnodAPI::downloadDataFinished, [=](const std::shared_ptr<Data> &colnodData) {
 
         // NOW I HAVE DATA FROM COLNOD
         if (!colnodData) {
             qCritical(syncmanager) << "Not possible to get correct data from colnod";
-            QCoreApplication::exit(-1);
+            emit end();
             return;
         }
 
-        std::unique_ptr<PreparedData> preparedData = prepareData(databaseData, colnodData);
+        // GETTING DATA FROM DATABASE
+        auto databaseData = database->downloadData();
+        if (!databaseData) {
+            emit end();
+            return;
+        }
+        // NOW I HAVE DATA FROM DATABASE
+
+        std::shared_ptr<PreparedData> preparedData = prepareData(databaseData, colnodData);
         if (!preparedData) {
             qCritical(syncmanager) << "Not possible to compose data";
-            QCoreApplication::exit(-1);
+            emit end();
             return;
         }
 
         if (!database->processData(preparedData->colnodData)) {
             qCritical(syncmanager) << "Not possible to upload data to database";
+            err = true;
+            return;
+        }
+        colnod->processData(preparedData);
+
+    });
+
+    connect(colnod.get(), &ColnodAPI::dataProcessFinished, [=](bool success, std::shared_ptr<PreparedData> preparedData){
+        if (!success) {
+            qCritical(syncmanager) << "Not possible to upload data to colnod";
+            err = true;
         }
 
-        // data is processed to other sides
-        connect(colnod.get(), &ColnodAPI::dataProcessFinished, [&,syncBegin](bool success){
+        // REUPDATE tokens pushed from database to colnod (cause of lastUpdate time)
+
+
+        // download data changes in this sync
+        colnod->updateAuthToken();
+        QTimer timer;
+        timer.setSingleShot(true);
+        QEventLoop loop;
+
+        QMetaObject::Connection myConnect = connect(colnod.get(), &ColnodAPI::authTokenUpdated, [this, &loop](bool success){
             if (!success) {
-                qCritical(syncmanager) << "Not possible to upload data to colnod";
+                qCritical(syncmanager) << "Cannot login to Colnod.";
+                emit end();
             }
-
-            // REUPDATE tokens pushed from database to colnod (cause of lastUpdate time)
-
-
-            // download data changes in this sync
-            colnod->updateAuthToken();
-            connect(colnod.get(), &ColnodAPI::authTokenUpdated, [&,syncBegin](bool success) {
-                if (!success) {
-                    qCritical(syncmanager) << "Cannot login to Colnod.";
-                    return;
-                }
-                Timestamp time;
-                time.setTimestamp(syncBegin - 75 * 1000);
-
-                auto tokensRequest = colnod->getTokensUpdated(time);
-
-                // updated data are ready
-                connect(tokensRequest.get(), &serversdk::Request::finished, [=](){
-
-                    auto uploadedData = std::make_shared<Data>();
-                    uploadedData->loadTokensFromJson(tokensRequest->responseData());
-
-                    if (!uploadedData) {
-                        qCritical(syncmanager) << "Not possible to get correct data from colnod";
-                        QCoreApplication::exit(-1);
-                        return;
-                    }
-                    if (!database->uploadTokens(uploadedData->updatedTokens, {"lastModified"})) {
-                        qCritical(syncmanager) << "Not possible to upload data to database";
-                        QCoreApplication::exit(-1);
-                        return;
-                    }
-                    database->reupdateDeleted(databaseData->deletedTokens);
-
-                    if (!database->isValid() || !colnod->isValid()) {
-                        qWarning(syncmanager) << "Unsuccessful FINISH, check warnings";
-                    }
-                    else {
-                        // set new time of last sync to this time of this run
-                        if (!database->setLastSync(syncBegin)) {
-                            qWarning(syncmanager) << "Unsuccessful FINISH, check warnings";
-                        }
-                        qInfo(syncmanager) << "Successful FINISH";
-                    }
-                    QCoreApplication::exit();
-                });
-            });
-
-
+            qDebug() << "test loop";
+            loop.quit();
         });
-        colnod->processData(preparedData->databaseData);
+
+//        connect(colnod.get(), &ColnodAPI::authTokenUpdated, [this](bool success) {\
+//            if (!success) {
+//            qCritical(syncmanager) << "Cannot login to Colnod.";
+//            emit end();
+//            }
+//            qDebug() << "test loop";
+//            return;
+//        });
+//        connect( colnod.get(), &ColnodAPI::authTokenUpdated, &loop, &QEventLoop::quit);
+        connect( &timer, &QTimer::timeout, &loop, &QEventLoop::quit );
+        timer.start(30000);
+        loop.exec();
+        loop.deleteLater();
+        disconnect(myConnect);
+        qDebug() << "Loop ended";
+        if(!timer.isActive()) {
+            qCritical("Cannot login to Colnod");
+            emit end();
+            return;
+        }
+        Timestamp time;
+        time.setTimestamp(syncBegin - 100 * 1000);
+
+        auto tokensRequest = colnod->getTokensUpdated(time);
+
+        // updated data are ready
+
+        connect(tokensRequest.get(), &serversdk::Request::finished, [=](){
+            auto uploadedData = std::make_shared<Data>();
+            uploadedData->loadTokensFromJson(tokensRequest->responseData());
+
+            if (!uploadedData) {
+                qCritical(syncmanager) << "Not possible to get correct data from colnod";
+                emit end();
+                return;
+            }
+            if (!database->uploadTokens(uploadedData->updatedTokens, {"lastModified"})) {
+                qCritical(syncmanager) << "Not possible to upload data to database";
+                emit end();
+                return;
+            }
+            database->reupdateDeleted(preparedData->databaseData->deletedTokens);
+
+            if (!database->isValid() || !colnod->isValid() || err || !database->setLastSync(syncBegin)) {
+                qWarning(syncmanager) << "Unsuccessful FINISH, check warnings";
+            } else {
+                qInfo(syncmanager) << "Successful FINISH";
+            }
+            emit end();
+        });
+
     });
+}
+
+bool SyncManager::startSynchronization()
+{
+    if (!database->isOpen() ) {
+        if (!database->open()) {
+            qCritical(syncmanager) << "Cannot open database.";
+            return false;
+        }
+    }
+
+    qint64 lastsync_in_ms = database->getLastSync();
+    if (lastsync_in_ms == -1) {
+        qCritical(syncmanager) << "Not possible to get last synchronization date";
+        return false;
+    }
+    mlastSync.setTimestamp(lastsync_in_ms);
+
+    // Need current time from db server
+    err = false;
+    syncBegin = database->getNow();
+    if (syncBegin == -1) {
+        qCritical(syncmanager) << "Not possible to get last sync date";
+        emit end();
+        return false;
+    }
+    qint64 offset = 75 * 1000;
+    qInfo(syncmanager) << tab << "Begin sync ( previous sync" << mlastSync.toDateString() << ")";
+
+    colnod->downloadData(mlastSync.timestamp() - offset);
+
     return true;
 }
 
 // goes through downloaded data and check if consist conflicts (both sides edit), already sync/deleted tokens or new tokens
-std::unique_ptr<PreparedData> SyncManager::prepareData(const std::shared_ptr<Data> &databaseData, const std::shared_ptr<Data> &colnodData)
+std::shared_ptr<PreparedData> SyncManager::prepareData(const std::shared_ptr<Data> &databaseData, const std::shared_ptr<Data> &colnodData)
 {
     auto preparedColnodData = std::make_shared<Data>();
     auto preparedDatabaseData = std::make_shared<Data>();
diff --git a/src/colnod/syncmanager.h b/src/colnod/syncmanager.h
index 9ac152c..822ecd7 100644
--- a/src/colnod/syncmanager.h
+++ b/src/colnod/syncmanager.h
@@ -13,6 +13,7 @@ public:
     explicit SyncManager(bool dryMode);
 
     bool databaseInitialization();
+    void init();
     bool startSynchronization();
 
 private:
@@ -22,7 +23,12 @@ private:
      * @param data from colnod
      * @return prepared data to be pushed into colnod and db
      */
-    std::unique_ptr<PreparedData> prepareData(const std::shared_ptr<Data> &databaseData, const std::shared_ptr<Data> &colnodData);
+    std::shared_ptr<PreparedData> prepareData(const std::shared_ptr<Data> &databaseData, const std::shared_ptr<Data> &colnodData);
+
+signals:
+    void error();
+    void end();
+
 
 private:
     /**
@@ -37,6 +43,8 @@ private:
     serversdk::RequestManager reqMan;
     serversdk::DatabaseManager dbMan;
     Timestamp mlastSync;
+    qint64 syncBegin;
+    bool err;
 
     bool mDryMode;
 };