diff --git a/server-sdk b/server-sdk
index 5ee8276..a818055 160000
--- a/server-sdk
+++ b/server-sdk
@@ -1 +1 @@
-Subproject commit 5ee82764e7fdcd6566b7eceac985b42348e2efcd
+Subproject commit a818055b75dc0de97e26be44cbbfd2e94516c09e
diff --git a/src/colnod/colnodapi.cpp b/src/colnod/colnodapi.cpp
index eadb3b9..55d818e 100644
--- a/src/colnod/colnodapi.cpp
+++ b/src/colnod/colnodapi.cpp
@@ -3,37 +3,73 @@
 Q_LOGGING_CATEGORY(colnod, "colnod.api");
 
 
-ColnodAPI::ColnodAPI(serversdk::RequestManager* reqMan, const qint64 &lastSync, const bool &dryMode, const QString &userName, const QString &password)
+ColnodAPI::ColnodAPI(serversdk::RequestManager* reqMan, const bool &dryMode, const QString &userName, const QString &password)
     :mReqMan(reqMan), mUserName(userName), mPassword(password), mDryMode(dryMode)
 {
-    mLastSync.set_timestamp(lastSync);
-    mData = std::make_shared<Data>();
-
     // -----------------------------------
     mReqMan->setIgnoreSsl(true);
     // -----------------------------------
 }
 
-void ColnodAPI::downloadData()
+void ColnodAPI::downloadData(const Timestamp &time)
 {
     // Have to get Login
     auto login = requestLogin();
     connect(login.get(), &serversdk::Request::finished, this, [=](){
         // Get login token
-        if (login->status() != 200) {
-            emit error();
+        if (!checkRequest(login)) {
+            emit downloadDataFinished(nullptr);
+            return;
         }
 
         AuthToken token;
         token.fromJson(login->responseData());
         authToken = token.id();
 
+        auto data = std::make_shared<Data>();
+
+        auto errorHandler = [=](std::shared_ptr<serversdk::Request> request){
+            if (!checkRequest(request)) {
+                qWarning(colnod) << "ERROR during calling" << request->url() << ", request unsuccessful";
+                mValid = false;
+                emit downloadDataFinished(nullptr);
+            }
+            else if (!checkResponse(request->responseData())) {
+                qWarning(colnod) << "Data from" << request->url() << "are invalid";
+                mValid = false;
+            }
+        };
+
         // if I have all data emit downloadDataFinished
         connect(this, &ColnodAPI::partOfDataReady, this, &ColnodAPI::areDataReady);
-        getTokensUpdated(mLastSync);
-        getTokensDeleted(mLastSync);
-        getSubjectsUpdated(mLastSync);
-        getSubjectsDeleted(mLastSync);
+
+        auto tokensRequest = getTokensUpdated(time);
+        connect(tokensRequest.get(), &serversdk::Request::finished, errorHandler);
+        connect(tokensRequest.get(), &serversdk::Request::finished, [=](){
+            saveUpdatedTokens(data, tokensRequest->responseData());
+            emit partOfDataReady(data);
+        });
+
+        auto deletedTokensRequest = getTokensDeleted(time);
+        connect(deletedTokensRequest.get(), &serversdk::Request::finished, errorHandler);
+        connect(deletedTokensRequest.get(), &serversdk::Request::finished, [=](){
+            saveDeletedTokens(data, deletedTokensRequest->responseData());
+            emit partOfDataReady(data);
+        });
+
+        auto subjectsRequest = getSubjectsUpdated(time);
+        connect(subjectsRequest.get(), &serversdk::Request::finished, errorHandler);
+        connect(subjectsRequest.get(), &serversdk::Request::finished, [=](){
+            saveUpdatedSubjects(data, subjectsRequest->responseData());
+            emit partOfDataReady(data);
+        });
+
+        auto deletedSubjectsRequest = getSubjectsDeleted(time);
+        connect(deletedSubjectsRequest.get(), &serversdk::Request::finished, errorHandler);
+        connect(deletedSubjectsRequest.get(), &serversdk::Request::finished, [=](){
+            saveDeletedSubjects(data, deletedSubjectsRequest->responseData());
+            emit partOfDataReady(data);
+        });
     });
 }
 
@@ -88,83 +124,39 @@ std::shared_ptr<serversdk::Request> ColnodAPI::requestLogin()
     return loginRequest;
 }
 
-void ColnodAPI::getTokensUpdated(const Timestamp &time)
+std::shared_ptr<serversdk::Request> ColnodAPI::getTokensUpdated(const Timestamp &time)
 {
     auto request = composeRequest("/TokenManager/getTokensUpdated", time.jsonData());
     request->setUserName(authToken);
     mReqMan->processRequest(request);
-    connect(request.get(), &serversdk::Request::finished, [=](){
-        if (!checkRequest(request)) {
-            qWarning(colnod) << "ERROR during calling /TokenManager/getTokensUpdated, request unsuccessful";
-            mValid = false;
-        }
-        else if (!checkResponse(request->responseData())) {
-            qWarning(colnod) << "Data from /TokenManager/getTokensUpdated are invalid";
-            mValid = false;
-        }
-        saveUpdatedTokens(request->responseData());
-        emit partOfDataReady(mData);
-    });
+    return request;
 }
 
-void ColnodAPI::getTokensDeleted(const Timestamp &time)
+std::shared_ptr<serversdk::Request> ColnodAPI::getTokensDeleted(const Timestamp &time)
 {
     auto request = composeRequest("/TokenManager/getTokensDeleted", time.jsonData());
     request->setUserName(authToken);
     mReqMan->processRequest(request);
-    connect(request.get(), &serversdk::Request::finished, [=](){
-        if (!checkRequest(request)) {
-            qWarning(colnod) << "ERROR during calling /TokenManager/getTokensDeleted, request unsuccessful";
-            mValid = false;
-        }
-        else if (!checkResponse(request->responseData())) {
-            qWarning(colnod) << "Data from /TokenManager/getTokensDeleted are invalid";
-            mValid = false;
-        }
-        saveDeletedTokens(request->responseData());
-        emit partOfDataReady();
-    });
+    return request;
 }
 
-void ColnodAPI::getSubjectsUpdated(const Timestamp &time)
+std::shared_ptr<serversdk::Request> ColnodAPI::getSubjectsUpdated(const Timestamp &time)
 {
     auto request = composeRequest("/SubjectManager/getSubjectsUpdated", time.jsonData());
     request->setUserName(authToken);
     mReqMan->processRequest(request);
-    connect(request.get(), &serversdk::Request::finished, [=](){
-        if (!checkRequest(request)) {
-            qWarning(colnod) << "ERROR during calling /SubjectManager/getSubjectsUpdated, request unsuccessful";
-            mValid = false;
-        }
-        else if (!checkResponse(request->responseData())) {
-            qWarning(colnod) << "Data from /SubjectManager/getSubjectsUpdated are invalid";
-            mValid = false;
-        }
-        saveUpdatedSubjects(request->responseData());
-        emit partOfDataReady();
-    });
+    return request;
 }
 
-void ColnodAPI::getSubjectsDeleted(const Timestamp &time)
+std::shared_ptr<serversdk::Request> ColnodAPI::getSubjectsDeleted(const Timestamp &time)
 {
     auto request = composeRequest("/SubjectManager/getSubjectsDeleted", time.jsonData());
     request->setUserName(authToken);
     mReqMan->processRequest(request);
-    connect(request.get(), &serversdk::Request::finished, [=](){
-        if (!checkRequest(request)) {
-            qWarning(colnod) << "ERROR during calling /SubjectManager/getSubjectsDeleted, request unsuccessful";
-            mValid = false;
-        }
-        else if (!checkResponse(request->responseData())) {
-            qWarning(colnod) << "Data from /SubjectManager/getSubjectsDeleted are invalid";
-            mValid = false;
-        }
-        saveDeletedSubjects(request->responseData());
-        emit partOfDataReady();
-    });
+    return request;
 }
 
-void ColnodAPI::setTokens(const QHash<QString, std::shared_ptr<Token>> &tokens)
+std::shared_ptr<serversdk::Request> ColnodAPI::setTokens(const QHash<QString, std::shared_ptr<Token>> &tokens)
 {
     auto request = composeRequest("/TokenManager/setTokens", Token::tokensToColnodJson(tokens));
     request->setUserName(authToken);
@@ -183,9 +175,10 @@ void ColnodAPI::setTokens(const QHash<QString, std::shared_ptr<Token>> &tokens)
             emit partOfDataProcessFinished();
         }
     });
+    return request;
 }
 
-void ColnodAPI::deleteTokens(const QList<QString> &ids)
+std::shared_ptr<serversdk::Request> ColnodAPI::deleteTokens(const QList<QString> &ids)
 {
     auto request = composeRequest("/TokenManager/deleteTokens", Token::idsToJSON(ids));
     request->setUserName(authToken);
@@ -204,7 +197,7 @@ void ColnodAPI::deleteTokens(const QList<QString> &ids)
             emit partOfDataProcessFinished();
         }
     });
-
+    return request;
 }
 
 std::shared_ptr<serversdk::Request> ColnodAPI::composeRequest(const QString &endpoint, const QByteArray &data)
@@ -257,19 +250,19 @@ void ColnodAPI::setUserName(const QString &userName)
     mUserName = userName;
 }
 
-void ColnodAPI::areDataReady()
+void ColnodAPI::areDataReady(std::shared_ptr<Data> data)
 {
     if (++amountData == 4) {
 
         qInfo(colnod) << tab << "-> COLNOD DATA:";
-        qInfo(colnod) << tab << tab << mData->updatedTokens.size() << "TOKENS WERE ADDED/UPDATED";
-        qInfo(colnod) << tab << tab << mData->deletedTokens.size() << "TOKENS DELETED";
-        qInfo(colnod) << tab << tab << mData->updatedSubjects.size() << "SUBJECTS WERE ADDED/UPDATED";
-        qInfo(colnod) << tab << tab << mData->deletedSubjects.size() << "SUBJECTS DELETED";
+        qInfo(colnod) << tab << tab << data->updatedTokens.size() << "TOKENS WERE ADDED/UPDATED";
+        qInfo(colnod) << tab << tab << data->deletedTokens.size() << "TOKENS DELETED";
+        qInfo(colnod) << tab << tab << data->updatedSubjects.size() << "SUBJECTS WERE ADDED/UPDATED";
+        qInfo(colnod) << tab << tab << data->deletedSubjects.size() << "SUBJECTS DELETED";
         qInfo(colnod) << dash;
 
-        emit downloadDataFinished(mData);
-        newData();
+        amountData = 0;
+        emit downloadDataFinished(data);
     }
 }
 
@@ -280,31 +273,31 @@ void ColnodAPI::isDataProcessFinished()
     }
 }
 
-void ColnodAPI::saveUpdatedTokens(const QByteArray &responseData)
+void ColnodAPI::saveUpdatedTokens(std::shared_ptr<Data> data, const QByteArray &responseData)
 {
-    mData->loadTokensFromJson(responseData);
+    data->loadTokensFromJson(responseData);
 }
 
-void ColnodAPI::saveDeletedTokens(const QByteArray &responseData)
+void ColnodAPI::saveDeletedTokens(std::shared_ptr<Data> data, const QByteArray &responseData)
 {
     QJsonDocument doc = QJsonDocument::fromJson(responseData);
     QJsonArray items = doc.object()["items"].toArray();
     for (QJsonValueRef item : items) {
-        mData->deletedTokens.append(item.toString());
+        data->deletedTokens.append(item.toString());
     }
 }
 
-void ColnodAPI::saveUpdatedSubjects(const QByteArray &responseData)
+void ColnodAPI::saveUpdatedSubjects(std::shared_ptr<Data> data, const QByteArray &responseData)
 {
-    mData->loadSubjectsFormJson(responseData);
+    data->loadSubjectsFormJson(responseData);
 }
 
-void ColnodAPI::saveDeletedSubjects(const QByteArray &responseData)
+void ColnodAPI::saveDeletedSubjects(std::shared_ptr<Data> data, const QByteArray &responseData)
 {
     QJsonDocument doc = QJsonDocument::fromJson(responseData);
     QJsonArray items = doc.object()["items"].toArray();
     for (QJsonValueRef item : items) {
-        mData->deletedSubjects.append(item.toString());
+        data->deletedSubjects.append(item.toString());
     }
 }
 
diff --git a/src/colnod/colnodapi.h b/src/colnod/colnodapi.h
index f75abbe..68ed360 100644
--- a/src/colnod/colnodapi.h
+++ b/src/colnod/colnodapi.h
@@ -23,6 +23,20 @@ class Timestamp : public serversdk::DatabaseTable {
     Q_OBJECT
     TABLE_PROPERTY(qint64, timestamp, set_timestamp, 0)
 public:
+    Timestamp() = default;
+    explicit Timestamp(const Timestamp &time)
+    {
+        this->set_timestamp(time.timestamp());
+    }
+    explicit Timestamp(qint64 time)
+    {
+        set_timestamp(time);
+    }
+    explicit Timestamp(QDateTime time)
+    {
+        set_timestamp(time.toMSecsSinceEpoch());
+    }
+
     QString toDateString()
     {
         return QDateTime::fromMSecsSinceEpoch(a_timestamp).toString("yyyy-MM-dd hh:mm:ss.zzz");
@@ -34,22 +48,22 @@ class ColnodAPI: public QObject
     Q_OBJECT
 public:
     ColnodAPI() = default;
-    ColnodAPI(serversdk::RequestManager* reqMan, const qint64 &lastSync = 0, const bool &dryMode = false, const QString &userName = "spaceti", const QString &password = "spaceti1");
+    ColnodAPI(serversdk::RequestManager* reqManconst, const bool &dryMode = false, const QString &userName = "spaceti", const QString &password = "spaceti1");
 
-    void downloadData();
+    void downloadData(const Timestamp &time);
     void processData(const std::shared_ptr<Data> &data);
 
     // New approach
     std::shared_ptr<serversdk::Request> requestLogin();
 
 
-    void getTokensUpdated(const Timestamp &time);
-    void getTokensDeleted(const Timestamp &time);
-    void getSubjectsUpdated(const Timestamp &time);
-    void getSubjectsDeleted(const Timestamp &time);
+    std::shared_ptr<serversdk::Request> getTokensUpdated(const Timestamp &time);
+    std::shared_ptr<serversdk::Request> getTokensDeleted(const Timestamp &time);
+    std::shared_ptr<serversdk::Request> getSubjectsUpdated(const Timestamp &time);
+    std::shared_ptr<serversdk::Request> getSubjectsDeleted(const Timestamp &time);
 
-    void setTokens(const QHash<QString, std::shared_ptr<Token>> &tokens);
-    void deleteTokens(const QList<QString> &tokenIds);
+    std::shared_ptr<serversdk::Request> setTokens(const QHash<QString, std::shared_ptr<Token>> &tokens);
+    std::shared_ptr<serversdk::Request> deleteTokens(const QList<QString> &tokenIds);
 
     // Attributes
     QString userName() const;
@@ -62,14 +76,14 @@ public:
     bool isValid();
 
 private:
-    Q_SLOT void areDataReady();
+    Q_SLOT void areDataReady(std::shared_ptr<Data> data);
     Q_SLOT void isDataProcessFinished();
 
 private:
-    void saveUpdatedTokens(const QByteArray &responseData);
-    void saveUpdatedSubjects(const QByteArray &responseData);
-    void saveDeletedTokens(const QByteArray &responseData);
-    void saveDeletedSubjects(const QByteArray &responseData);
+    void saveUpdatedTokens(std::shared_ptr<Data> data, const QByteArray &responseData);
+    void saveUpdatedSubjects(std::shared_ptr<Data> data, const QByteArray &responseData);
+    void saveDeletedTokens(std::shared_ptr<Data> data, const QByteArray &responseData);
+    void saveDeletedSubjects(std::shared_ptr<Data> data, const QByteArray &responseData);
 
     void newData();
 
diff --git a/src/colnod/syncmanager.cpp b/src/colnod/syncmanager.cpp
index c56e7a9..4020c02 100644
--- a/src/colnod/syncmanager.cpp
+++ b/src/colnod/syncmanager.cpp
@@ -32,7 +32,7 @@ bool SyncManager::databaseInitialization()
 
     // here -> nothing can fail
     mlastSync.set_timestamp(database->getLastSync());
-    colnod = std::make_shared<ColnodAPI>(&reqMan, mlastSync.timestamp(), mDryMode);
+    colnod = std::make_shared<ColnodAPI>(&reqMan, mDryMode);
     return true;
 }
 
@@ -62,7 +62,7 @@ bool SyncManager::startSynchronization()
     // NOW I HAVE DATA FROM DATABASE
 
 
-    colnod->downloadData();
+    colnod->downloadData(Timestamp(syncBegin));
     connect(colnod.get(), &ColnodAPI::downloadDataFinished, [=](std::shared_ptr<Data> data) {
         if (!data) {
             qCritical(syncmanager) << "Not possible to get correct data from colnod";
@@ -133,7 +133,7 @@ bool SyncManager::downloadData()
     connect(colnod.get(), &ColnodAPI::downloadDataFinished, this, &SyncManager::saveColnodData);
     //connect(database.get(), &DatabaseAPI::downloadDataFinished, this, &SyncManager::saveDatabaseData);
     //database->downloadData();
-    colnod->downloadData();
+    //colnod->downloadData();
 
     return res;
 }
diff --git a/test/auto/auto.pro b/test/auto/auto.pro
index d155315..3fa2a6d 100644
--- a/test/auto/auto.pro
+++ b/test/auto/auto.pro
@@ -2,4 +2,5 @@ TEMPLATE = subdirs
 
 SUBDIRS += \
     database/tst_databaseapi.pro \
+    colnod/tst_colnodapi.pro \
     syncmanager/tst_syncmanager.pro \
diff --git a/test/auto/colnod/tst_colnodapi.cpp b/test/auto/colnod/tst_colnodapi.cpp
new file mode 100644
index 0000000..69d32e8
--- /dev/null
+++ b/test/auto/colnod/tst_colnodapi.cpp
@@ -0,0 +1,113 @@
+#include <QtTest>
+
+#include "colnodapi.h"
+#include "serversdk/request.h"
+// add necessary includes here
+
+Q_DECLARE_METATYPE(std::shared_ptr<Data>)
+Q_DECLARE_METATYPE(std::shared_ptr<serversdk::Request>);
+
+class ColnodTest : public QObject
+{
+    Q_OBJECT
+public:
+    ColnodTest()
+    {
+        qRegisterMetaType<std::shared_ptr<Data>>();
+        qRegisterMetaType<std::shared_ptr<serversdk::Request>>();
+    }
+
+private slots:
+    void login();
+    void getTokens();
+    void download_data_test();
+    void download_data_fail_test();
+
+private:
+    QString getLoginToken(ColnodAPI &colnod);
+};
+
+
+
+
+void ColnodTest::login()
+{
+    serversdk::RequestManager reqMan;
+    ColnodAPI colnod(&reqMan);
+    auto login = colnod.requestLogin();
+    QSignalSpy spy(login.get(), &serversdk::Request::finished);
+    QCOMPARE(spy.count(), 0);
+    QVERIFY(spy.wait());
+    QCOMPARE(spy.count(), 1);
+    QVERIFY(login->responseData().contains("id"));
+}
+
+void ColnodTest::getTokens()
+{
+    serversdk::RequestManager reqMan;
+    ColnodAPI colnod(&reqMan);
+
+    // get login token
+    auto login = colnod.requestLogin();
+    QSignalSpy spy(login.get(), &serversdk::Request::finished);
+    spy.wait();
+    QString token = getLoginToken(colnod);
+    Timestamp time(QDateTime::currentMSecsSinceEpoch());
+    colnod.getTokensUpdated(time);
+}
+
+void ColnodTest::download_data_test()
+{
+    serversdk::RequestManager reqMan;
+    ColnodAPI colnod(&reqMan);
+    {
+        QSignalSpy spy(&colnod, &ColnodAPI::downloadDataFinished);
+        colnod.downloadData(Timestamp(1570190399259));
+        QVERIFY(spy.wait());
+
+        auto data = qvariant_cast<std::shared_ptr<Data>>(spy.at(0).at(0));
+        QVERIFY(data);
+
+        QVERIFY(data->updatedTokens.size() > 0);
+        QVERIFY(data->updatedTokens.contains("5e2f1260-da1c-441f-9644-24dfe3b97b2a"));
+    }
+    {
+        Timestamp time(QDateTime::currentMSecsSinceEpoch());
+        colnod.downloadData(time);
+        QSignalSpy spy(&colnod, &ColnodAPI::downloadDataFinished);
+        QVERIFY(spy.wait());
+        auto data = qvariant_cast<std::shared_ptr<Data>>(spy.at(0).at(0));
+        QVERIFY(data);
+
+        QVERIFY(data->updatedTokens.size() == 0);
+    }
+}
+
+void ColnodTest::download_data_fail_test()
+{
+    serversdk::RequestManager reqMan;
+    ColnodAPI colnod(&reqMan, false, "spaceti", "wrong password");
+
+    Timestamp time(0);
+    QSignalSpy spy(&colnod, &ColnodAPI::downloadDataFinished);
+    colnod.downloadData(time);
+
+    QVERIFY(spy.wait());
+
+    auto data = qvariant_cast<std::shared_ptr<Data>>(spy.at(0).at(0));
+
+
+}
+
+QString ColnodTest::getLoginToken(ColnodAPI &colnod)
+{
+    auto login = colnod.requestLogin();
+    QSignalSpy spy(login.get(), &serversdk::Request::finished);
+    spy.wait();
+    return login->responseData().mid(7,36);
+
+}
+
+QTEST_GUILESS_MAIN(ColnodTest)
+
+#include "tst_colnodapi.moc"
diff --git a/test/auto/colnod/tst_colnodapi.pro b/test/auto/colnod/tst_colnodapi.pro
new file mode 100644
index 0000000..b0e4013
--- /dev/null
+++ b/test/auto/colnod/tst_colnodapi.pro
@@ -0,0 +1,11 @@
+QT += testlib
+QT -= gui
+
+CONFIG += qt console warn_on depend_includepath testcase
+CONFIG -= app_bundle
+
+TEMPLATE = app
+
+SOURCES +=  tst_colnodapi.cpp
+
+include(../../test.pri)