diff --git a/main.qml b/main.qml
index 4423868c..aedb3b63 100644
--- a/main.qml
+++ b/main.qml
@@ -192,11 +192,17 @@ Window {
         }
 
         onClicked: {
-            featureComingSoon.open()
-//            if (Network.isActive)
-//                Network.isActive = false
-//            else
-//                networkDialog.open()
+            if (Network.isActive)
+                Network.isActive = false
+            else
+                networkDialog.open()
+        }
+    }
+
+    Connections {
+        target: Network
+        function onHealthCheckFailed(code) {
+            healthCheckFailed.open();
         }
     }
 
@@ -237,9 +243,9 @@ Window {
     }
 
     PopupDialog {
-        id: featureComingSoon
+        id: healthCheckFailed
         anchors.centerIn: parent
-        text: qsTr("Feature coming soon!")
+        text: qsTr("Connection to datalake failed.")
     }
 
     Button {
@@ -278,12 +284,6 @@ Window {
             copyEdit.selectAll()
             copyEdit.copy()
             copyMessage.open()
-            timer.start()
-        }
-        Timer {
-            id: timer
-            interval: 500; running: false; repeat: false
-            onTriggered: copyMessage.close()
         }
     }
 
diff --git a/network.cpp b/network.cpp
index f5bc331d..cde7e170 100644
--- a/network.cpp
+++ b/network.cpp
@@ -24,11 +24,10 @@ Network::Network()
 {
     QSettings settings;
     settings.sync();
-    m_isActive = settings.value("network/isActive", false).toBool();
     m_uniqueId = settings.value("uniqueId", generateUniqueId()).toString();
     settings.setValue("uniqueId", m_uniqueId);
     settings.sync();
-    emit activeChanged();
+    setActive(settings.value("network/isActive", false).toBool());
 }
 
 void Network::setActive(bool b)
@@ -38,6 +37,8 @@ void Network::setActive(bool b)
     settings.sync();
     m_isActive = b;
     emit activeChanged();
+    if (m_isActive)
+        sendHealth();
 }
 
 QString Network::generateUniqueId() const
@@ -101,8 +102,10 @@ void Network::handleJsonUploadFinished()
     int code = response.toInt(&ok);
     if (!ok)
         qWarning() << "ERROR: Invalid response.";
-    if (code != 200)
+    if (code != 200) {
         qWarning() << "ERROR: response != 200 code:" << code;
+        sendHealth();
+    }
 
     QByteArray jsonData = jsonReply->readAll();
     QJsonParseError err;
@@ -124,3 +127,31 @@ bool Network::sendConversation(const QString &conversation)
 {
     return packageAndSendJson(conversation);
 }
+
+void Network::sendHealth()
+{
+    QUrl healthUrl("http://localhost/v1/health");
+    QNetworkRequest request(healthUrl);
+    QNetworkReply *healthReply = m_networkManager.get(request);
+    connect(healthReply, &QNetworkReply::finished, this, &Network::handleHealthFinished);
+}
+
+void Network::handleHealthFinished()
+{
+    QNetworkReply *healthReply = qobject_cast<QNetworkReply *>(sender());
+    if (!healthReply)
+        return;
+
+    QVariant response = healthReply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
+    Q_ASSERT(response.isValid());
+    bool ok;
+    int code = response.toInt(&ok);
+    if (!ok)
+        qWarning() << "ERROR: Invalid response.";
+    if (code != 200) {
+        qWarning() << "ERROR: response != 200 code:" << code;
+        emit healthCheckFailed(code);
+        setActive(false);
+    }
+    healthReply->deleteLater();
+}
diff --git a/network.h b/network.h
index bc5bd233..b2fa63a0 100644
--- a/network.h
+++ b/network.h
@@ -10,7 +10,6 @@ class Network : public QObject
     Q_OBJECT
     Q_PROPERTY(bool isActive READ isActive WRITE setActive NOTIFY activeChanged)
 public:
-
     static Network *globalInstance();
 
     bool isActive() const { return m_isActive; }
@@ -21,11 +20,14 @@ public:
 
 Q_SIGNALS:
     void activeChanged();
+    void healthCheckFailed(int code);
 
 private Q_SLOTS:
+    void handleHealthFinished();
     void handleJsonUploadFinished();
 
 private:
+    void sendHealth();
     bool packageAndSendJson(const QString &json);
 
 private:
diff --git a/qml/PopupDialog.qml b/qml/PopupDialog.qml
index 60be8871..de45cc53 100644
--- a/qml/PopupDialog.qml
+++ b/qml/PopupDialog.qml
@@ -4,7 +4,7 @@ import QtQuick.Controls
 import QtQuick.Layouts
 
 Dialog {
-    id: copyMessage
+    id: popupDialog
     anchors.centerIn: parent
     modal: false
     opacity: 0.9
@@ -29,4 +29,14 @@ Dialog {
     exit: Transition {
         NumberAnimation { duration: 500; property: "opacity"; from: 1.0; to: 0.0 }
     }
+
+    onOpened: {
+        timer.start()
+    }
+
+    Timer {
+        id: timer
+        interval: 500; running: false; repeat: false
+        onTriggered: popupDialog.close()
+    }
 }
\ No newline at end of file