diff --git a/UIs/BeetRoundWidgets/CMakeLists.txt b/UIs/BeetRoundWidgets/CMakeLists.txt
index 8c97104..1e558a0 100644
--- a/UIs/BeetRoundWidgets/CMakeLists.txt
+++ b/UIs/BeetRoundWidgets/CMakeLists.txt
@@ -36,6 +36,7 @@ if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
         views/itemdetailmapper.h views/itemdetailmapper.cpp
         widgets/comboboxdelegate.h widgets/comboboxdelegate.cpp
         widgets/spinboxdelegate.h widgets/spinboxdelegate.cpp
+        widgets/biddingroundcontrol.h widgets/biddingroundcontrol.cpp
     )
 # Define target properties for Android with Qt 6 as:
 #    set_property(TARGET ${TARGET_APP} APPEND PROPERTY QT_ANDROID_PACKAGE_SOURCE_DIR
diff --git a/UIs/BeetRoundWidgets/mainwindow.cpp b/UIs/BeetRoundWidgets/mainwindow.cpp
index 5b3985f..1fb23d4 100644
--- a/UIs/BeetRoundWidgets/mainwindow.cpp
+++ b/UIs/BeetRoundWidgets/mainwindow.cpp
@@ -17,6 +17,7 @@
 #include "model/generalsortfiltermodel.h"
 #include "model/metadata.h"
 #include "model/tablemodel.h"
+#include "widgets/biddingroundcontrol.h"
 #include "widgets/comboboxdelegate.h"
 #include "widgets/spinboxdelegate.h"
 
@@ -70,6 +71,8 @@ MainWindow::MainWindow(QWidget* parent)
 
   onSelectionChanged(QItemSelection(), QItemSelection());
   onCurrentChanged(QModelIndex(), QModelIndex());
+
+  setupEventTab();
 }
 
 MainWindow::~MainWindow() { delete ui; }
@@ -176,11 +179,6 @@ void MainWindow::on_actionCheck_for_update_triggered() {
   }
 }
 
-void MainWindow::on_pushButton_clicked() {
-  const QString prefix("Backend provided by: ");
-  ui->label->setText(prefix + m_core->toString());
-}
-
 void MainWindow::openNewItemDialog() {
   showStatusMessage(tr("Invoked 'Edit|New Item'"));
   m_newItemDialog->show();
@@ -300,24 +298,9 @@ void MainWindow::findItems() {
   }
 }
 
-void MainWindow::fetchItems() {
-  showStatusMessage(tr("Invoked 'Server|Fetch items'"));
-  emit m_core->fetchItemsFromServer();
-}
-
-void MainWindow::postItems() {
-  showStatusMessage(tr("Invoked 'Server|Post items'"));
-  const QModelIndex currentIndex = ui->tableView->currentIndex();
-  const QByteArray jsonData      = m_proxyModel->jsonDataForServer(currentIndex);
-  emit m_core->postItemToServer(jsonData);
-}
-
-void MainWindow::deleteItem() {
-  showStatusMessage(tr("Invoked 'Server|Delete items'"));
-  const QModelIndex currentIndex = ui->tableView->currentIndex();
-  // const QByteArray jsonData      = m_proxyModel->jsonDataForServer(currentIndex);
-  const QString currentId = m_proxyModel->getUuid(currentIndex);
-  emit m_core->deleteItemFromServer(currentId);
+void MainWindow::fetchCurrentBiddings() {
+  showStatusMessage(tr("Invoked 'Server|Fetch current biddings'"));
+  emit m_core->sendGetRequest(GetBiddingsOfHighestRound);
 }
 
 void MainWindow::execSettingsDialog() {
@@ -522,25 +505,12 @@ void MainWindow::createEditActions() {
 }
 
 void MainWindow::createServerActions() {
-  m_fetchItemsAct = make_unique<QAction>(tr("&Fetch item(s)"), this);
-  m_fetchItemsAct->setShortcut(QKeySequence(Qt::CTRL | Qt::ALT | Qt::Key_Down));
-  m_fetchItemsAct->setStatusTip(tr("Fetches all item on configured server"));
-  connect(m_fetchItemsAct.get(), &QAction::triggered, this, &MainWindow::fetchItems);
-  ui->menu_Server->addAction(m_fetchItemsAct.get());
-
-  m_postItemsAct = make_unique<QAction>(tr("&Post item(s)"), this);
-  m_postItemsAct->setShortcut(QKeySequence(Qt::CTRL | Qt::ALT | Qt::Key_Up));
-  // m_postItemsAct->setStatusTip(tr("Posts the selected items on configured server"));
-  m_postItemsAct->setStatusTip(tr("Posts the current item on configured server"));
-  connect(m_postItemsAct.get(), &QAction::triggered, this, &MainWindow::postItems);
-  ui->menu_Server->addAction(m_postItemsAct.get());
-
-  m_deleteItemsAct = make_unique<QAction>(tr("&Delete item"), this);
-  m_deleteItemsAct->setShortcut(QKeySequence(Qt::CTRL | Qt::ALT | Qt::Key_Backspace));
-  // m_deleteItemsAct->setStatusTip(tr("Deletes the selected items on configured server"));
-  m_deleteItemsAct->setStatusTip(tr("Deletes the current item on configured server"));
-  connect(m_deleteItemsAct.get(), &QAction::triggered, this, &MainWindow::deleteItem);
-  ui->menu_Server->addAction(m_deleteItemsAct.get());
+  m_fetchCurrentBiddingsAct = make_unique<QAction>(tr("&Fetch biddings"), this);
+  m_fetchCurrentBiddingsAct->setShortcut(QKeySequence(Qt::CTRL | Qt::ALT | Qt::Key_Down));
+  m_fetchCurrentBiddingsAct->setStatusTip(tr("Fetches all biddings of the current round"));
+  connect(m_fetchCurrentBiddingsAct.get(), &QAction::triggered, this,
+          &MainWindow::fetchCurrentBiddings);
+  ui->menu_Server->addAction(m_fetchCurrentBiddingsAct.get());
 }
 
 void MainWindow::createToolsActions() {
@@ -569,3 +539,20 @@ void MainWindow::createGuiDialogs() {
   m_editItemDialog = make_unique<EditItemDialog>(ui->tableView, this);
   m_editItemDialog->createContent();
 }
+
+void MainWindow::setupEventTab() {
+  QWidget* containerWidget     = new QWidget();
+  QVBoxLayout* containerLayout = new QVBoxLayout(containerWidget);
+  m_biddingRoundControl        = make_unique<BiddingRoundControl>();
+  containerLayout->addWidget(m_biddingRoundControl.get());
+
+  /// requests
+  connect(m_biddingRoundControl.get(), &BiddingRoundControl::sendGetRequest, m_core.get(),
+          &GenericCore::sendGetRequest);
+
+  /// responses
+  connect(m_core.get(), &GenericCore::currentBiddingRoundChanged, m_biddingRoundControl.get(),
+          &BiddingRoundControl::onCurrentBiddingRoundChanged);
+
+  ui->tabWidget->insertTab(0, containerWidget, "Event (&1)");
+}
diff --git a/UIs/BeetRoundWidgets/mainwindow.h b/UIs/BeetRoundWidgets/mainwindow.h
index b8f9949..75f610d 100644
--- a/UIs/BeetRoundWidgets/mainwindow.h
+++ b/UIs/BeetRoundWidgets/mainwindow.h
@@ -19,6 +19,7 @@ class TableModel;
 class GeneralSortFilterModel;
 class NewItemDialog;
 class EditItemDialog;
+class BiddingRoundControl;
 
 using namespace std;
 
@@ -44,8 +45,6 @@ class MainWindow : public QMainWindow {
   void onAboutClicked();
   void on_actionCheck_for_update_triggered();
 
-  void on_pushButton_clicked();
-
   /// slots for menu actions
   void openNewItemDialog();
   void openEditItemDialog();
@@ -64,9 +63,7 @@ class MainWindow : public QMainWindow {
   void findItems();
 
   /// 'Server' slots
-  void fetchItems();
-  void postItems();
-  void deleteItem();
+  void fetchCurrentBiddings();
 
   /// 'Tools' slots
   void execSettingsDialog();
@@ -78,7 +75,7 @@ class MainWindow : public QMainWindow {
   shared_ptr<GeneralSortFilterModel> m_proxyModel;
   QUndoStack* m_modelUndoStack;
   unique_ptr<QUndoView> m_modelUndoView;
-
+  unique_ptr<BiddingRoundControl> m_biddingRoundControl;
   /// File actions
   unique_ptr<QAction> m_newFileAct;
   unique_ptr<QAction> m_openAct;
@@ -98,9 +95,7 @@ class MainWindow : public QMainWindow {
   unique_ptr<QAction> m_deleteItemAct;
   unique_ptr<QAction> m_findItemAct;
   /// Server actions
-  unique_ptr<QAction> m_fetchItemsAct;
-  unique_ptr<QAction> m_postItemsAct;
-  unique_ptr<QAction> m_deleteItemsAct;
+  unique_ptr<QAction> m_fetchCurrentBiddingsAct;
 
   /// View actions
   unique_ptr<QAction> m_showModelUndoViewAct;
@@ -119,5 +114,7 @@ class MainWindow : public QMainWindow {
   void createToolsActions();
   void createHelpMenu();
   void createGuiDialogs();
+
+  void setupEventTab();
 };
 #endif  // MAINWINDOW_H
diff --git a/UIs/BeetRoundWidgets/mainwindow.ui b/UIs/BeetRoundWidgets/mainwindow.ui
index d32d7f5..86e34b6 100644
--- a/UIs/BeetRoundWidgets/mainwindow.ui
+++ b/UIs/BeetRoundWidgets/mainwindow.ui
@@ -14,22 +14,22 @@
    <string>GenericQtClient</string>
   </property>
   <widget class="QWidget" name="centralwidget">
-   <layout class="QVBoxLayout" name="verticalLayout">
-    <item>
-     <widget class="QTableView" name="tableView"/>
-    </item>
-    <item>
-     <widget class="QLabel" name="label">
-      <property name="text">
-       <string>Push the button!</string>
-      </property>
-     </widget>
-    </item>
-    <item>
-     <widget class="QPushButton" name="pushButton">
-      <property name="text">
-       <string>Button</string>
+   <layout class="QGridLayout" name="gridLayout_2">
+    <item row="0" column="0">
+     <widget class="QTabWidget" name="tabWidget">
+      <property name="currentIndex">
+       <number>0</number>
       </property>
+      <widget class="QWidget" name="tab_user">
+       <attribute name="title">
+        <string>Mitglieder (&amp;2)</string>
+       </attribute>
+       <layout class="QGridLayout" name="gridLayout">
+        <item row="0" column="0">
+         <widget class="QTableView" name="tableView"/>
+        </item>
+       </layout>
+      </widget>
      </widget>
     </item>
    </layout>
diff --git a/UIs/BeetRoundWidgets/widgets/biddingroundcontrol.cpp b/UIs/BeetRoundWidgets/widgets/biddingroundcontrol.cpp
new file mode 100644
index 0000000..71dfbe1
--- /dev/null
+++ b/UIs/BeetRoundWidgets/widgets/biddingroundcontrol.cpp
@@ -0,0 +1,67 @@
+#include "biddingroundcontrol.h"
+
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QPushButton>
+
+BiddingRoundControl::BiddingRoundControl(QWidget* parent)
+    : QWidget{parent} {
+  m_layout = new QHBoxLayout(this);
+  m_title  = new QLabel("Bidding round control:");
+  m_status = new QLabel("(No round started yet.)");
+
+  m_newRoundButton     = new QPushButton("Start new round");
+  m_restartRoundButton = new QPushButton("Restart last round");
+  m_stopRoundButton    = new QPushButton("Stop round");
+  m_refreshRoundButton = new QPushButton("Refresh");
+
+  m_newRoundButton->setEnabled(false);
+  m_restartRoundButton->setEnabled(false);
+  m_stopRoundButton->setEnabled(false);
+
+  m_layout->addWidget(m_title);
+  m_layout->addWidget(m_status);
+  m_layout->addWidget(m_newRoundButton);
+  m_layout->addWidget(m_restartRoundButton);
+  m_layout->addWidget(m_stopRoundButton);
+  m_layout->addWidget(m_refreshRoundButton);
+
+  connect(m_newRoundButton, &QPushButton::clicked, this,
+          &BiddingRoundControl::onStartNewRoundTriggered);
+  connect(m_restartRoundButton, &QPushButton::clicked, this,
+          &BiddingRoundControl::onRestartLastRoundTriggered);
+  connect(m_stopRoundButton, &QPushButton::clicked, this,
+          &BiddingRoundControl::onStopCurrentRoundTriggered);
+  connect(m_refreshRoundButton, &QPushButton::clicked, this,
+          &BiddingRoundControl::onRefreshCurrentRoundTriggered);
+}
+
+void BiddingRoundControl::onRefreshCurrentRoundTriggered() {
+  emit sendGetRequest(GetCurrentBiddingRound);
+}
+
+void BiddingRoundControl::onStartNewRoundTriggered() { emit sendGetRequest(StartNewBiddingRound); }
+
+void BiddingRoundControl::onRestartLastRoundTriggered() {
+  emit sendGetRequest(RestartLastBiddingRound);
+}
+
+void BiddingRoundControl::onStopCurrentRoundTriggered() {
+  emit sendGetRequest(StopCurrentBiddingRound);
+}
+
+void BiddingRoundControl::onCurrentBiddingRoundChanged(int roundNumber, bool isActive) {
+  QString text = QString::number(roundNumber);
+  if (isActive) {
+    text.append(" (active)");
+    m_newRoundButton->setEnabled(false);
+    m_restartRoundButton->setEnabled(false);
+    m_stopRoundButton->setEnabled(true);
+  } else {
+    text.append(" (stopped)");
+    m_newRoundButton->setEnabled(true);
+    m_restartRoundButton->setEnabled(roundNumber > 0);
+    m_stopRoundButton->setEnabled(false);
+  }
+  m_status->setText(text);
+}
diff --git a/UIs/BeetRoundWidgets/widgets/biddingroundcontrol.h b/UIs/BeetRoundWidgets/widgets/biddingroundcontrol.h
new file mode 100644
index 0000000..ee64bf1
--- /dev/null
+++ b/UIs/BeetRoundWidgets/widgets/biddingroundcontrol.h
@@ -0,0 +1,39 @@
+#ifndef BIDDINGROUNDCONTROL_H
+#define BIDDINGROUNDCONTROL_H
+
+#include <QWidget>
+#include "model/metadata.h"
+
+class QPushButton;
+class QLabel;
+class QHBoxLayout;
+class BiddingRoundControl : public QWidget {
+  Q_OBJECT
+ public:
+  explicit BiddingRoundControl(QWidget* parent = nullptr);
+
+ signals:
+  void sendGetRequest(GetRequestTypes type, QVariant data = QVariant());
+
+ public slots:
+  /// button slots
+  void onRefreshCurrentRoundTriggered();
+  void onStartNewRoundTriggered();
+  void onRestartLastRoundTriggered();
+  void onStopCurrentRoundTriggered();
+
+  /// event slots
+  void onCurrentBiddingRoundChanged(int roundNumber, bool isActive);
+
+ private:
+  QHBoxLayout* m_layout = nullptr;
+  QLabel* m_title       = nullptr;
+  QLabel* m_status      = nullptr;
+
+  QPushButton* m_newRoundButton     = nullptr;
+  QPushButton* m_restartRoundButton = nullptr;
+  QPushButton* m_stopRoundButton    = nullptr;
+  QPushButton* m_refreshRoundButton = nullptr;
+};
+
+#endif  // BIDDINGROUNDCONTROL_H
diff --git a/UIs/BeetRoundWidgets/widgets/comboboxdelegate.h b/UIs/BeetRoundWidgets/widgets/comboboxdelegate.h
index 59a03c3..a79b5d8 100644
--- a/UIs/BeetRoundWidgets/widgets/comboboxdelegate.h
+++ b/UIs/BeetRoundWidgets/widgets/comboboxdelegate.h
@@ -2,9 +2,10 @@
 #define COMBOBOXDELEGATE_H
 
 #include <QStyledItemDelegate>
-
 class QStringListModel;
+
 class ComboboxDelegate : public QStyledItemDelegate {
+  // TODO move source code files into subfolder "widgets/delegate"
   Q_OBJECT
  public:
   explicit ComboboxDelegate(const QStringList items, QObject* parent = nullptr);
diff --git a/UIs/BeetRoundWidgets/widgets/spinboxdelegate.h b/UIs/BeetRoundWidgets/widgets/spinboxdelegate.h
index 1016640..a5e9920 100644
--- a/UIs/BeetRoundWidgets/widgets/spinboxdelegate.h
+++ b/UIs/BeetRoundWidgets/widgets/spinboxdelegate.h
@@ -4,6 +4,7 @@
 #include <QStyledItemDelegate>
 
 class SpinboxDelegate : public QStyledItemDelegate {
+  // TODO move source code files into subfolder "widgets/delegate"
   Q_OBJECT
  public:
   explicit SpinboxDelegate(QObject* parent = nullptr);
diff --git a/libs/BeetRoundCore/CMakeLists.txt b/libs/BeetRoundCore/CMakeLists.txt
index 11492df..fcda6a6 100644
--- a/libs/BeetRoundCore/CMakeLists.txt
+++ b/libs/BeetRoundCore/CMakeLists.txt
@@ -23,19 +23,20 @@ add_library(${TARGET_APP} STATIC
   genericcore.h
   ${TS_FILES}
   constants.h
+  structs.h
   data/settingshandler.h data/settingshandler.cpp
+  data/filehandler.h data/filehandler.cpp
+  formats/jsonparser.h formats/jsonparser.cpp
+  formats/csvparser.h formats/csvparser.cpp
+  model/metadata.h
   model/tablemodel.h model/tablemodel.cpp
   model/modelitem.h model/modelitem.cpp
-  formats/jsonparser.h formats/jsonparser.cpp
+  model/generalsortfiltermodel.h model/generalsortfiltermodel.cpp
   model/commands/insertrowscommand.h model/commands/insertrowscommand.cpp
   model/commands/removerowscommand.h model/commands/removerowscommand.cpp
   model/commands/edititemcommand.h model/commands/edititemcommand.cpp
-  data/filehandler.h data/filehandler.cpp
-  model/metadata.h
-  formats/csvparser.h formats/csvparser.cpp
-  model/generalsortfiltermodel.h model/generalsortfiltermodel.cpp
-  network/servercommunicator.h network/servercommunicator.cpp
   network/apiroutes.h
+  network/servercommunicator.h network/servercommunicator.cpp
   # 3rd party libraries
   ../3rdParty/rapidcsv/src/rapidcsv.h
 )
diff --git a/libs/BeetRoundCore/genericcore.cpp b/libs/BeetRoundCore/genericcore.cpp
index 6403ea5..3942fc0 100644
--- a/libs/BeetRoundCore/genericcore.cpp
+++ b/libs/BeetRoundCore/genericcore.cpp
@@ -8,6 +8,7 @@
 #include <QProcess>
 #include <QSettings>
 #include <QString>
+#include <QtGui/QUndoStack>
 
 #include "../../ApplicationConfig.h"
 #include "CoreConfig.h"
@@ -19,8 +20,6 @@
 #include "model/tablemodel.h"
 #include "network/servercommunicator.h"
 
-#include <QtGui/QUndoStack>
-
 using namespace std;
 
 GenericCore::GenericCore() {
@@ -155,36 +154,9 @@ bool GenericCore::isSyncServerSetup() const {
   }
 }
 
-void GenericCore::onSendItemTriggered(const QByteArray& jsonData) {
-  m_serverCommunicator->postItems(jsonData);
-}
-
-void GenericCore::onItemsFetched(const QByteArray jsonData) {
-  emit displayStatusMessage("New items fetched.");
-  // TODO ? check compability of JSON structure beforehand?
-  // NEXT check if item already exists and apply changes (UUID,...) ? ;
-  m_mainModel->appendItems(jsonData);
-}
-
-void GenericCore::onItemsFetchFailure(const QString errorString) {
-  emit displayStatusMessage(QString("Error: %1").arg(errorString));
-}
-
-void GenericCore::onPostRequestSuccessful(const QByteArray responseData) {
-  const QString message = m_mainModel->updateItemsFromJson(responseData);
-  emit displayStatusMessage(message);
-}
-
-void GenericCore::onPostRequestFailure(const QString errorString) {
-  emit displayStatusMessage(QString("Error: %1").arg(errorString));
-}
-
-void GenericCore::onDeleteRequestSuccessful(const QByteArray responseData) {
-  qWarning() << "TODO: Process success response!!!";
-}
-
-void GenericCore::onDeleteRequestFailure(const QString errorString) {
-  qWarning() << "TODO: Process error response!!!";
+void GenericCore::onBiddingsChanged(int round, QList<bidding> biddings) {
+  qInfo() << "onBiddingsChanged: round:" << round << "- biddings:" << biddings.count();
+  // NEXT merge biddings into model
 }
 
 void GenericCore::setupModels() {
@@ -246,27 +218,6 @@ QString GenericCore::getMaintenanceToolFilePath() const {
 
 void GenericCore::setupServerConfiguration() {
   m_serverCommunicator = make_unique<ServerCommunicator>(this);
-  /// request connections
-  connect(this, &GenericCore::fetchItemsFromServer, m_serverCommunicator.get(),
-          &ServerCommunicator::fetchItems);
-  connect(this, &GenericCore::postItemToServer, this, &GenericCore::onSendItemTriggered);
-  connect(this, &GenericCore::deleteItemFromServer, m_serverCommunicator.get(),
-          &ServerCommunicator::deleteItem);
-
-  /// response connections
-  connect(m_serverCommunicator.get(), &ServerCommunicator::itemsFetched, this,
-          &GenericCore::onItemsFetched);
-  connect(m_serverCommunicator.get(), &ServerCommunicator::itemsFetchFailure, this,
-          &GenericCore::onItemsFetchFailure);
-  connect(m_serverCommunicator.get(), &ServerCommunicator::postRequestSuccessful, this,
-          &GenericCore::onPostRequestSuccessful);
-  connect(m_serverCommunicator.get(), &ServerCommunicator::postRequestFailure, this,
-          &GenericCore::onPostRequestFailure);
-  connect(m_serverCommunicator.get(), &ServerCommunicator::deleteRequestSuccessful, this,
-          &GenericCore::onDeleteRequestSuccessful);
-  connect(m_serverCommunicator.get(), &ServerCommunicator::deleteRequestFailure, this,
-          &GenericCore::onDeleteRequestFailure);
-
   applyServerConfiguration();
 }
 
diff --git a/libs/BeetRoundCore/genericcore.h b/libs/BeetRoundCore/genericcore.h
index 4bf30ea..9df744b 100644
--- a/libs/BeetRoundCore/genericcore.h
+++ b/libs/BeetRoundCore/genericcore.h
@@ -2,6 +2,10 @@
 #define GENERICCORE_H
 
 #include <QObject>
+#include <QVariant>
+
+#include "model/metadata.h"
+#include "structs.h"
 
 class QUndoStack;
 class QAbstractItemModel;
@@ -38,16 +42,18 @@ class GenericCore : public QObject {
   bool isSyncServerSetup() const;
 
  public slots:
-  void onSendItemTriggered(const QByteArray& jsonData);
-  void onItemsFetched(const QByteArray jsonData);
-  void onItemsFetchFailure(const QString errorString);
-  void onPostRequestSuccessful(const QByteArray responseData);
-  void onPostRequestFailure(const QString errorString);
-  void onDeleteRequestSuccessful(const QByteArray responseData);
-  void onDeleteRequestFailure(const QString errorString);
+  void onBiddingsChanged(int round, QList<bidding> biddings);
 
  signals:
   void displayStatusMessage(QString message);
+
+  /// *** server communication ***
+  ///     request signals
+  void sendGetRequest(GetRequestTypes type, QVariant data = QVariant());
+  ///     response signals
+  void currentBiddingRoundChanged(int round, bool isRunning);
+
+  /// deprecated signals
   void fetchItemsFromServer();
   void postItemToServer(const QByteArray& jsonData);
   void deleteItemFromServer(const QString& id);
diff --git a/libs/BeetRoundCore/model/metadata.h b/libs/BeetRoundCore/model/metadata.h
index 435511b..dbbe9c0 100644
--- a/libs/BeetRoundCore/model/metadata.h
+++ b/libs/BeetRoundCore/model/metadata.h
@@ -82,6 +82,16 @@ static const QString ITEM_KEY_STRING  = "item";
 /// file naming
 static const QString ITEMS_FILE_NAME = ITEMS_KEY_STRING + ".json";
 
+/// server communication
+enum GetRequestTypes {
+  GetCurrentBiddingRound,
+  StartNewBiddingRound,
+  RestartLastBiddingRound,
+  StopCurrentBiddingRound,
+  GetBiddingsOfSpecificRound,
+  GetBiddingsOfHighestRound
+};
+
 /// functions
 static UserRoles GET_ROLE_FOR_COLUMN(const int column) {
   switch (column) {
diff --git a/libs/BeetRoundCore/network/apiroutes.h b/libs/BeetRoundCore/network/apiroutes.h
index e89da3a..5422772 100644
--- a/libs/BeetRoundCore/network/apiroutes.h
+++ b/libs/BeetRoundCore/network/apiroutes.h
@@ -9,4 +9,12 @@ static const QString apiPrefix = "/api/";
 
 static const QString ROUTE_ITEMS = apiPrefix + "items";
 
+static const QString ROUTE_BIDDINGROUNDS        = apiPrefix + "bidding_rounds";
+static const QString ROUTE_CURRENT_BIDDINGROUND = ROUTE_BIDDINGROUNDS + "/get_current";
+static const QString ROUTE_START_BIDDINGROUND   = ROUTE_BIDDINGROUNDS + "/start_new";
+static const QString ROUTE_RESTART_BIDDINGROUND = ROUTE_BIDDINGROUNDS + "/restart";
+static const QString ROUTE_STOP_BIDDINGROUND    = ROUTE_BIDDINGROUNDS + "/stop";
+
+static const QString ROUTE_GET_BIDDINGS_OF_SPECIFIC_ROUND = apiPrefix + "biddings_of_round";
+static const QString ROUTE_GET_BIDDINGS_OF_HIGHEST_ROUND  = apiPrefix + "biddings_of_highest_round";
 #endif  // APIROUTES_H
diff --git a/libs/BeetRoundCore/network/servercommunicator.cpp b/libs/BeetRoundCore/network/servercommunicator.cpp
index 7545e2e..0c42fb6 100644
--- a/libs/BeetRoundCore/network/servercommunicator.cpp
+++ b/libs/BeetRoundCore/network/servercommunicator.cpp
@@ -1,21 +1,29 @@
 #include "servercommunicator.h"
-#include "apiroutes.h"
 
 #include <QJsonArray>
-#include <QJsonDocument>
 #include <QJsonObject>
+#include <QRestAccessManager>
 #include <QRestReply>
 
+#include "../genericcore.h"
+#include "../structs.h"
+#include "apiroutes.h"
+
 using namespace Qt::StringLiterals;
 
-ServerCommunicator::ServerCommunicator(QObject* parent)
-    : QObject{parent} {
+ServerCommunicator::ServerCommunicator(GenericCore* core)
+    : m_core(core)
+    , QObject{core} {
   m_netManager.setAutoDeleteReplies(true);
   m_restManager = std::make_shared<QRestAccessManager>(&m_netManager);
   m_serviceApi  = std::make_shared<QNetworkRequestFactory>();
+
+  connect(m_core, &GenericCore::sendGetRequest, this,
+          &ServerCommunicator::onSendGetRequestTriggered);
+  connect(this, &ServerCommunicator::biddingsChanged, m_core, &GenericCore::onBiddingsChanged);
 }
 
-bool ServerCommunicator::sslSupported() {
+bool ServerCommunicator::sslSupported() const {
 #if QT_CONFIG(ssl)
   return QSslSocket::supportsSsl();
 #else
@@ -104,3 +112,108 @@ void ServerCommunicator::setServerConfiguration(const QString url,
   m_email    = email;
   m_password = password;
 }
+
+void ServerCommunicator::onSendGetRequestTriggered(const GetRequestTypes type,
+                                                   QVariant data = QVariant()) {
+  QString path;
+  switch (type) {
+    case GetCurrentBiddingRound:
+      path = ROUTE_CURRENT_BIDDINGROUND;
+      break;
+    case StartNewBiddingRound:
+      path = ROUTE_START_BIDDINGROUND;
+      break;
+    case RestartLastBiddingRound:
+      path = ROUTE_RESTART_BIDDINGROUND;
+      break;
+    case StopCurrentBiddingRound:
+      path = ROUTE_STOP_BIDDINGROUND;
+      break;
+    case GetBiddingsOfSpecificRound:
+      path = ROUTE_GET_BIDDINGS_OF_SPECIFIC_ROUND + "/" + data.toString();
+      break;
+    case GetBiddingsOfHighestRound:
+      path = ROUTE_GET_BIDDINGS_OF_HIGHEST_ROUND;
+      break;
+    default:
+      qWarning() << "No route found for GetRequestType:" << type;
+      break;
+  }
+
+  // TODO move into default case of switch statement?
+  if (path.isEmpty()) {
+    qDebug() << "Empty path -> Not sending a request.";
+    return;
+  }
+
+  const QNetworkRequest request = m_serviceApi->createRequest(path);
+
+  m_restManager->get(request, this, [this, type](QRestReply& reply) {
+    if (reply.isSuccess()) {
+      qInfo() << "Request successful.";
+      const QJsonDocument doc = reply.readJson().value();
+      onGetReplySuccessful(type, doc);
+    } else {
+      if (reply.hasError()) {
+        const QString errorString = reply.errorString();
+        qWarning() << "Network error:" << errorString;
+        onGetReplyFailure(type, errorString);
+      } else {
+        int statusCode = reply.httpStatus();
+        qWarning() << "Request not successful:" << statusCode;
+        onGetReplyFailure(type, QString("HTTP status code: %1").arg(statusCode));
+      }
+    }
+  });
+}
+
+void ServerCommunicator::onGetReplySuccessful(const GetRequestTypes type, const QJsonDocument doc) {
+  switch (type) {
+    case GetCurrentBiddingRound:
+    case StartNewBiddingRound:
+    case RestartLastBiddingRound:
+    case StopCurrentBiddingRound:
+      currentBiddingRoundChangedReply(doc);
+      break;
+    case GetBiddingsOfSpecificRound:
+    case GetBiddingsOfHighestRound:
+      currentBiddingsReply(doc);
+      break;
+    default:
+      qWarning() << "Can't match request type:" << type;
+      break;
+  }
+}
+
+void ServerCommunicator::onGetReplyFailure(const GetRequestTypes type, const QString errorString) {
+  const QString message =
+      QString("Request of type %1 returned: %2").arg(QString::number(type), errorString);
+  m_core->displayStatusMessage(message);
+}
+
+void ServerCommunicator::currentBiddingRoundChangedReply(const QJsonDocument jsonDoc) {
+  qInfo() << "Current bidding round received.";
+  const QJsonObject rootObject = jsonDoc["data"].toObject();
+  const int roundNumber        = rootObject["round_number"].toInt();
+  const bool stopped           = rootObject["stopped"].toBool();
+  const bool isActive          = !stopped;
+
+  // NOTE ?use ServerCommunicator::currentBiddingRoundChanged signal instead of emiting a signal of
+  // the core directly?
+  emit m_core->currentBiddingRoundChanged(roundNumber, isActive);
+}
+
+void ServerCommunicator::currentBiddingsReply(const QJsonDocument jsonDoc) {
+  qCritical() << "currentBiddingsReply:" << jsonDoc;
+
+  // NEXT extract biddings from jsonDoc
+  const int roundNumber = 0;
+  const bidding dummyBidding{.userId       = QUuid(),
+                             .biddingRound = 0,
+                             .amount       = 123,
+                             .depotWishOne = "one",
+                             .depotWishTwo = "two"};
+  const QList<bidding> biddings{dummyBidding};
+
+  emit biddingsChanged(roundNumber, biddings);
+}
diff --git a/libs/BeetRoundCore/network/servercommunicator.h b/libs/BeetRoundCore/network/servercommunicator.h
index 3107604..0f6b3df 100644
--- a/libs/BeetRoundCore/network/servercommunicator.h
+++ b/libs/BeetRoundCore/network/servercommunicator.h
@@ -1,17 +1,23 @@
 #ifndef SERVERCOMMUNICATOR_H
 #define SERVERCOMMUNICATOR_H
 
+#include <QJsonDocument>
 #include <QNetworkAccessManager>
 #include <QNetworkRequestFactory>
 #include <QObject>
 #include <QRestAccessManager>
 
+#include "../model/metadata.h"
+
+class bidding;
+class GenericCore;
+
 class ServerCommunicator : public QObject {
   Q_OBJECT
  public:
-  explicit ServerCommunicator(QObject* parent = nullptr);
+  explicit ServerCommunicator(GenericCore* core);
 
-  bool sslSupported();
+  bool sslSupported() const;
 
   QUrl url() const;
   void setUrl(const QUrl& url);
@@ -19,6 +25,10 @@ class ServerCommunicator : public QObject {
   void setServerConfiguration(const QString url, const QString email, const QString password);
 
  public slots:
+  void onSendGetRequestTriggered(const GetRequestTypes type, QVariant data);
+  void onGetReplySuccessful(const GetRequestTypes type, const QJsonDocument doc);
+  void onGetReplyFailure(const GetRequestTypes type, const QString errorString);
+
   void fetchItems();
   void postItems(const QByteArray& jsonData);
   void deleteItem(const QString& id);
@@ -33,7 +43,12 @@ class ServerCommunicator : public QObject {
   void deleteRequestSuccessful(const QByteArray responseData);
   void deleteRequestFailure(const QString errorString);
 
+  void currentBiddingRoundChanged(int round, bool isRunning);
+  void biddingsChanged(int round, QList<bidding> biddings);
+
  private:
+  GenericCore* m_core = nullptr;
+
   QNetworkAccessManager m_netManager;
   std::shared_ptr<QRestAccessManager> m_restManager;
   std::shared_ptr<QNetworkRequestFactory> m_serviceApi;
@@ -41,6 +56,10 @@ class ServerCommunicator : public QObject {
   QString m_email;
   QString m_password;
   // QString m_authToken;
+
+  /// reply parser
+  void currentBiddingRoundChangedReply(const QJsonDocument jsonDoc);
+  void currentBiddingsReply(const QJsonDocument jsonDoc);
 };
 
 #endif  // SERVERCOMMUNICATOR_H
diff --git a/libs/BeetRoundCore/structs.h b/libs/BeetRoundCore/structs.h
new file mode 100644
index 0000000..c32bb93
--- /dev/null
+++ b/libs/BeetRoundCore/structs.h
@@ -0,0 +1,14 @@
+#ifndef STRUCTS_H
+#define STRUCTS_H
+
+#include <QUuid>
+
+struct bidding {
+  QUuid userId;
+  int biddingRound;
+  int amount;
+  QString depotWishOne;
+  QString depotWishTwo;
+};
+
+#endif  // STRUCTS_H