diff --git a/src/Backend.cpp b/src/Backend.cpp
index 2556057..5d8bed0 100644
--- a/src/Backend.cpp
+++ b/src/Backend.cpp
@@ -48,9 +48,6 @@ void Backend::setBrokerPort(int port) {
 const QMqttClient::ClientState Backend::brokerState() const {
   return this->m_client->state();
 }
-void Backend::setBrokerState(const QMqttClient::ClientState &state) {
-  this->m_client->setState(state);
-}
 
 void Backend::onBrokerStateChanged(const QMqttClient::ClientState &state) {
   qWarning() << "State change" << state;
@@ -58,5 +55,9 @@ void Backend::onBrokerStateChanged(const QMqttClient::ClientState &state) {
   if (state != QMqttClient::Connected)
     return;
 
-  // TODO: subscribe
+  this->m_client->subscribe(QMqttTopicFilter("/spec"), 1);
+}
+
+const Spec::SpecStatus Backend::specStatus() const {
+  return this->m_specStatus;
 }
\ No newline at end of file
diff --git a/src/Backend.hpp b/src/Backend.hpp
index 284284a..feedb5f 100644
--- a/src/Backend.hpp
+++ b/src/Backend.hpp
@@ -15,16 +15,46 @@
 #include <QObject>
 #include <QtQml>
 
+namespace Spec {
+Q_NAMESPACE
+
+enum SpecStatus {
+  SPEC_READY,
+  SPEC_ACQUIRING,
+  SPEC_NEEDS_CALIBRATION,
+  SPEC_ERROR,
+  SPEC_UNKNOWN,
+};
+
+enum ConnectionStatus {
+  BROKER_DISCONNECTED,
+  BROKER_CONNECTING,
+  BROKER_CONNECTED,
+};
+
+Q_ENUM_NS(SpecStatus)
+Q_ENUM_NS(ConnectionStatus)
+
+} // namespace Spec
+
 class Backend : public QObject {
   Q_OBJECT
+
+  // Broker properties
   Q_PROPERTY(QString brokerHost READ brokerHost WRITE setBrokerHost NOTIFY
                  brokerHostChanged)
   Q_PROPERTY(int brokerPort READ brokerPort WRITE setBrokerPort NOTIFY
                  brokerPortChanged)
-  Q_PROPERTY(QMqttClient::ClientState brokerState READ brokerState WRITE
-                 setBrokerState NOTIFY brokerStateChanged)
+  Q_PROPERTY(QMqttClient::ClientState brokerState READ brokerState NOTIFY
+                 brokerStateChanged)
   QML_NAMED_ELEMENT(Backend)
 
+  // Spectrometer properties
+  Q_PROPERTY(
+      Spec::SpecStatus specStatus READ specStatus NOTIFY specStatusChanged)
+
+  QML_EXTENDED_NAMESPACE(Spec)
+
 public:
   explicit Backend(QObject *parent = nullptr);
 
@@ -45,12 +75,14 @@ public:
   void setBrokerPort(int port);
 
   const QMqttClient::ClientState brokerState() const;
-  void setBrokerState(const QMqttClient::ClientState &state);
+
+  const Spec::SpecStatus specStatus() const;
 
 signals:
   void brokerHostChanged();
   void brokerPortChanged();
   void brokerStateChanged();
+  void specStatusChanged();
 
 private slots:
   void onBrokerStateChanged(const QMqttClient::ClientState &state);
@@ -58,4 +90,5 @@ private slots:
 private:
   Q_DISABLE_COPY(Backend)
   QMqttClient *m_client;
+  Spec::SpecStatus m_specStatus = Spec::SPEC_UNKNOWN;
 };
\ No newline at end of file
diff --git a/src/Gui/Splash.qml b/src/Gui/Splash.qml
index 2c5322c..d8b2b48 100644
--- a/src/Gui/Splash.qml
+++ b/src/Gui/Splash.qml
@@ -7,7 +7,7 @@ import "PStyle"
 import "Login"
 import "."
 
-Window {
+ApplicationWindow {
   visible: true
   width: 640
   height: 480
@@ -30,7 +30,10 @@ Window {
     repeat: false
     interval: 750
 
-    onTriggered: loader.source = "qrc:/Login/Login.qml"
+    onTriggered: {
+      loader.source = "qrc:/Login/Login.qml"
+      footer.visible = true
+    }
   }
 
   Timer {
@@ -81,4 +84,73 @@ Window {
       }
     }
   }
+
+  footer: ToolBar {
+    visible: false
+
+    background: PBackground {
+      color: Qt.lighter(PStyle.backColor)
+    }
+
+    RowLayout {
+      anchors.verticalCenter: parent.verticalCenter
+      width: parent.width
+
+      spacing: 12
+
+      RowLayout {
+        PText {
+          font: PStyle.getFont(10)
+          text: qsTr("Connection status:")
+        }
+
+        Rectangle {
+          Layout.preferredHeight: 12
+          Layout.preferredWidth: 12
+          color:
+            App.brokerState == 2 ? "lime" :
+            App.brokerState == 1 ? "yellow" :
+            "red"
+          radius: width / 2
+        }
+
+        PText {
+          font: PStyle.getFont(10)
+          text:
+            App.brokerState == 2 ? "connected" :
+            App.brokerState == 1 ? "connecting" :
+            "disconnected"
+        }
+      }
+
+      RowLayout {
+        Layout.alignment: Qt.AlignRight
+
+        PText {
+          font: PStyle.getFont(10)
+          text: qsTr("Spectrometer status:")
+        }
+
+        Rectangle {
+          Layout.preferredHeight: 12
+          Layout.preferredWidth: 12
+          color:
+            App.specStatus == App.SPEC_UNKNOWN ? "gray" :
+            App.specStatus == App.SPEC_ERROR ? "red" :
+            "lime"
+          radius: width / 2
+        }
+
+        PText {
+          font: PStyle.getFont(10)
+          text:
+            App.specStatus == App.SPEC_ERROR ? "error" :
+            App.specStatus == App.SPEC_READY ? "ready" :
+            App.specStatus == App.SPEC_NEEDS_CALIBRATION ? "needs calibration" :
+            App.specStatus == App.SPEC_ACQUIRING ? "acquiring" :
+            "unknown"
+        }
+      }
+    }
+  }
 }
\ No newline at end of file