diff --git a/CMakeLists.txt b/CMakeLists.txt
index a1ce0a5..11ab008 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,8 +42,6 @@ add_executable(${PROJECT_NAME}
     mainwindow.h
     mainwindow.cpp
     mainwindow.ui
-    multiplexer.h
-    multiplexer.cpp
     triggerwidget.cpp
     triggerwidget.h
     pythonrunner.cpp
diff --git a/channelwidget.cpp b/channelwidget.cpp
index 5c32f45..2f6a02e 100644
--- a/channelwidget.cpp
+++ b/channelwidget.cpp
@@ -108,7 +108,6 @@ void ChannelWidget::onGangComboChanged(int index)
             gangedChannelNumber = -1;
             checkbox.setEnabled(true);
             checkbox.setChecked(false);
-            checkbox.setChecked(false);
         } else {
             // A ganged channel was selected
             QString currentText = gangcombo.currentText();
@@ -128,7 +127,7 @@ void ChannelWidget::onGangComboChanged(int index)
 void ChannelWidget::onOtherChannelStateChanged(uint16_t deviceSerial, uint16_t channelNumber, bool checked)
 {
         // If this channel is ganged to the channel that changed state
-        if (gangedDeviceSerial == deviceSerial && gangedChannelNumber == channelNumber) {
+        if (this->deviceSerial == deviceSerial && this->channelNumber == channelNumber) {
             // Update our checkbox state to follow the ganged channel
             checkbox.blockSignals(true);
             checkbox.setChecked(checked);
@@ -163,3 +162,9 @@ void ChannelWidget::setGangedChannel(uint16_t gangedDeviceSerial, uint16_t gange
         updateCheckboxState();
 }
 
+void ChannelWidget::replaceMultiplexer(std::shared_ptr<struct eismultiplexer> multiplexer, int serial)
+{
+    if(serial == deviceSerial || serial == -1)
+        this->multiplexer = multiplexer;
+}
+
diff --git a/channelwidget.h b/channelwidget.h
index 959ad86..f149df0 100644
--- a/channelwidget.h
+++ b/channelwidget.h
@@ -33,6 +33,7 @@ public slots:
 private slots:
         void onChannelToggled(bool checked);
         void onGangComboChanged(int index);
+        void replaceMultiplexer(std::shared_ptr<struct eismultiplexer> multiplexer, int serial = -1);
 
 signals:
         void channelAboutToBeTurnedOn(uint16_t deviceSerial, uint16_t channelNumber);
diff --git a/mainwindow.cpp b/mainwindow.cpp
index ed4f5b4..b7bd50e 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -1,4 +1,3 @@
-#include <eismultiplexer.h>
 #include <QMessageBox>
 #include <QMessageBox>
 #include <set>
@@ -19,7 +18,6 @@ MainWindow::MainWindow(QWidget *parent):
     isFileModified(false)
 {
         ui->setupUi(this);
-        enumerateDevices();
 
         codeEditor.setAutoIndentation(true);
         codeEditor.setAutoParentheses(true);
@@ -55,6 +53,8 @@ MainWindow::MainWindow(QWidget *parent):
         connect(ui->pushButtonRun, &QPushButton::clicked, this, &MainWindow::runScript);
         connect(ui->pushButtonStop, &QPushButton::clicked, this, &MainWindow::stopScript);
         connect(&pythonRunner, &PythonRunner::scriptFinished, this, &MainWindow::stopScript);
+        enumerateDevices();
+        generateExample();
 }
 
 MainWindow::~MainWindow()
@@ -62,6 +62,30 @@ MainWindow::~MainWindow()
         delete ui;
 }
 
+void MainWindow::readState()
+{
+    for (auto& multiplexer : multiplexers) {
+        channel_t channelstate = eismultiplexer_get_connected(multiplexer.second.get());
+        for (auto& channel : channels) {
+            for(size_t i = 0; i < 16; ++i) {
+                channel_t mask = static_cast<channel_t>(1 << i);
+                channel->onOtherChannelStateChanged(multiplexer.first, i, channelstate & mask);
+            }
+        }
+
+        int triggerCount = eismultiplexer_get_trigger_count(multiplexer.second.get());
+        for(int i = 0; i < triggerCount; ++i) {
+            bool level;
+            trigger_state_t state;
+            int ret = eismultiplexer_get_trigger_state(multiplexer.second.get(), i, &state, &level);
+            if (ret < 0) {
+                for (auto& trigger : triggers)
+                    trigger->updateSate(multiplexer.first, i, state);
+            }
+        }
+    }
+}
+
 void MainWindow::updateStatus()
 {
     if (!currentFilePath.isEmpty()) {
@@ -150,6 +174,9 @@ void MainWindow::enumerateDevices()
 {
         size_t count = 0;
         uint16_t* serials = eismultiplexer_list_available_devices(&count);
+        if (ui->scrollArea->layout())
+            delete ui->scrollArea->layout();
+        QVBoxLayout* channelLayout = new QVBoxLayout(ui->scrollArea);
 
         if (!serials || count == 0)
         {
@@ -168,6 +195,7 @@ void MainWindow::enumerateDevices()
                 int ret = eismultiplexer_connect(multiplexer.get(), serial);
                 if (ret == 0)
                 {
+                        multiplexers.push_back({serial, multiplexer});
                         uint16_t channelCount = 0;
                         qDebug()<<"Adding channels from device "<<serial;
                         if (eismultiplexer_get_channel_count(multiplexer.get(), &channelCount) >= 0)
@@ -177,7 +205,7 @@ void MainWindow::enumerateDevices()
                                         std::shared_ptr<ChannelWidget> widget(new ChannelWidget(serial, channel, multiplexer));
                                         qDebug()<<"Added widget from device "<<serial<<" channel "<<channel;
                                         channels.push_back(widget);
-                                        ui->channelLayout->addWidget(widget.get());
+                                        channelLayout->addWidget(widget.get());
                                 }
                         }
 
@@ -191,7 +219,7 @@ void MainWindow::enumerateDevices()
                                         std::shared_ptr<TriggerWidget> triggerWidget(new TriggerWidget(serial, trigger, multiplexer));
                                         qDebug()<<"Added trigger widget from device "<<serial<<" trigger "<<trigger;
                                         triggers.push_back(triggerWidget);
-                                        ui->channelLayout->addWidget(triggerWidget.get());
+                                        channelLayout->addWidget(triggerWidget.get());
                                 }
                         }
                 }
@@ -202,7 +230,8 @@ void MainWindow::enumerateDevices()
                         qWarning()<<"Failed to connect to device with serial"<<serial<<"eismultiplexer_connect returned"<<ret;
                 }
         }
-        ui->channelLayout->addStretch();
+
+        channelLayout->addStretch();
 
         // Second pass: populate gang combos and connect signals for channels
         for (const auto& widget : channels) {
@@ -226,10 +255,11 @@ void MainWindow::enumerateDevices()
             }
         }
 
+        readState();
+
         ui->statusbar->showMessage("Ready");
 
         free(serials);
-        generateExample();
 }
 
 void MainWindow::runScript() {
@@ -239,14 +269,25 @@ void MainWindow::runScript() {
     ui->pushButtonStop->setEnabled(true);
     codeEditor.setEnabled(false);
     ui->scrollArea->setEnabled(false);
+    disconnectDevices();
 }
 
 void MainWindow::stopScript() {
     pythonRunner.stopScript();
+    channels.clear();
+    triggers.clear();
     ui->pushButtonRun->setEnabled(true);
     ui->pushButtonStop->setEnabled(false);
     codeEditor.setEnabled(true);
     ui->scrollArea->setEnabled(true);
+    enumerateDevices();
+}
+
+void MainWindow::disconnectDevices()
+{
+    for(auto& multiplexer : multiplexers)
+        eismultiplexer_disconnect(multiplexer.second.get());
+    multiplexers.clear();
 }
 
 void MainWindow::generateExample()
diff --git a/mainwindow.h b/mainwindow.h
index 0c60a8f..686c6a2 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -1,13 +1,13 @@
 #ifndef MAINWINDOW_H
 #define MAINWINDOW_H
 
+#include <eismultiplexer.h>
 #include <QMainWindow>
 #include <memory>
 #include <QCodeEditor>
 #include <QPythonCompleter>
 #include <QPythonHighlighter>
 #include <QProgressBar>
-
 #include "channelwidget.h"
 #include "triggerwidget.h"
 #include "pythonrunner.h"
@@ -19,10 +19,11 @@ class MainWindow;
 
 class MainWindow : public QMainWindow
 {
-        Q_OBJECT
-        std::vector<std::shared_ptr<ChannelWidget>> channels;
-        std::vector<std::shared_ptr<TriggerWidget>> triggers;
-        Ui::MainWindow *ui;
+    Q_OBJECT
+    std::vector<std::shared_ptr<TriggerWidget>> triggers;
+    std::vector<std::shared_ptr<ChannelWidget>> channels;
+    std::vector<std::pair<uint16_t, std::shared_ptr<struct eismultiplexer>>> multiplexers;
+    Ui::MainWindow *ui;
     QCodeEditor codeEditor;
     QPythonHighlighter highligter;
     QPythonCompleter completer;
@@ -42,11 +43,13 @@ private slots:
         void onActionSaveAsTriggered();
         void runScript();
         void stopScript();
+        void readState();
 
 private:
         void enumerateDevices();
         void generateExample();
         void updateStatus();
+        void disconnectDevices();
         QString currentFilePath;
         bool isFileModified;
 };
diff --git a/mainwindow.ui b/mainwindow.ui
index d32da49..c858820 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -16,58 +16,65 @@
   <widget class="QWidget" name="centralwidget">
    <layout class="QHBoxLayout" name="horizontalLayout">
     <item>
-     <layout class="QVBoxLayout" name="codeLayout">
-      <property name="leftMargin">
-       <number>10</number>
+     <widget class="QSplitter" name="splitter">
+      <property name="orientation">
+       <enum>Qt::Orientation::Horizontal</enum>
       </property>
-      <item>
-       <layout class="QHBoxLayout" name="horizontalLayout_3">
+      <widget class="QWidget" name="">
+       <layout class="QVBoxLayout" name="codeLayout">
+        <property name="leftMargin">
+         <number>0</number>
+        </property>
         <item>
-         <widget class="QPushButton" name="pushButtonStop">
-          <property name="enabled">
-           <bool>false</bool>
-          </property>
-          <property name="text">
-           <string>Stop</string>
-          </property>
-          <property name="icon">
-           <iconset theme="QIcon::ThemeIcon::MediaPlaybackStop"/>
-          </property>
-         </widget>
-        </item>
-        <item>
-         <widget class="QPushButton" name="pushButtonRun">
-          <property name="text">
-           <string>Run</string>
-          </property>
-          <property name="icon">
-           <iconset theme="QIcon::ThemeIcon::MediaPlaybackStart"/>
-          </property>
-         </widget>
+         <layout class="QHBoxLayout" name="horizontalLayout_3">
+          <item>
+           <widget class="QPushButton" name="pushButtonStop">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
+            <property name="text">
+             <string>Stop</string>
+            </property>
+            <property name="icon">
+             <iconset theme="QIcon::ThemeIcon::MediaPlaybackStop"/>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QPushButton" name="pushButtonRun">
+            <property name="text">
+             <string>Run</string>
+            </property>
+            <property name="icon">
+             <iconset theme="QIcon::ThemeIcon::MediaPlaybackStart"/>
+            </property>
+           </widget>
+          </item>
+         </layout>
         </item>
        </layout>
-      </item>
-     </layout>
-    </item>
-    <item>
-     <widget class="QScrollArea" name="scrollArea">
-      <property name="widgetResizable">
-       <bool>true</bool>
-      </property>
-      <widget class="QWidget" name="scrollAreaWidgetContents">
-       <property name="geometry">
-        <rect>
-         <x>0</x>
-         <y>0</y>
-         <width>591</width>
-         <height>533</height>
-        </rect>
+      </widget>
+      <widget class="QScrollArea" name="scrollArea">
+       <property name="minimumSize">
+        <size>
+         <width>400</width>
+         <height>0</height>
+        </size>
        </property>
-       <layout class="QVBoxLayout" name="verticalLayout_3">
-        <item>
-         <layout class="QVBoxLayout" name="channelLayout"/>
-        </item>
-       </layout>
+       <property name="widgetResizable">
+        <bool>true</bool>
+       </property>
+       <widget class="QWidget" name="scrollAreaWidgetContents">
+        <property name="geometry">
+         <rect>
+          <x>0</x>
+          <y>0</y>
+          <width>504</width>
+          <height>537</height>
+         </rect>
+        </property>
+        <layout class="QVBoxLayout" name="verticalLayout_3"/>
+       </widget>
       </widget>
      </widget>
     </item>
diff --git a/multiplexer.cpp b/multiplexer.cpp
deleted file mode 100644
index 3e1c8e0..0000000
--- a/multiplexer.cpp
+++ /dev/null
@@ -1,16 +0,0 @@
-#include "multiplexer.h"
-
-Multiplexer::Multiplexer(QObject *parent)
-	: QObject{parent}
-{}
-
-Multiplexer::~Multiplexer()
-{
-	for(auto& multiplexer : multiplexers)
-		eismultiplexer_disconnect(multiplexer.get());
-}
-
-void Multiplexer::probe()
-{
-
-}
diff --git a/multiplexer.h b/multiplexer.h
deleted file mode 100644
index 32a04ec..0000000
--- a/multiplexer.h
+++ /dev/null
@@ -1,22 +0,0 @@
-#ifndef MULTIPLEXER_H
-#define MULTIPLEXER_H
-
-#include <QObject>
-#include "eismultiplexer.h"
-
-class Multiplexer : public QObject
-{
-	Q_OBJECT
-	std::vector<std::shared_ptr<struct eismultiplexer>> multiplexers;
-	std::vector<channel_t> channelStates;
-
-public:
-	explicit Multiplexer(QObject *parent = nullptr);
-	~Multiplexer();
-	void probe();
-
-signals:
-	void foundDevice(std::shared_ptr<struct eismultiplexer>);
-};
-
-#endif // MULTIPLEXER_H
diff --git a/pythonrunner.cpp b/pythonrunner.cpp
index 8f7e126..e2ba0ab 100644
--- a/pythonrunner.cpp
+++ b/pythonrunner.cpp
@@ -16,7 +16,7 @@ PythonRunner::~PythonRunner() {
     }
 }
 
-void PythonRunner::runScript(const QString& scriptContent) {
+bool PythonRunner::runScript(const QString& scriptContent) {
     if (m_process->state() == QProcess::Running) {
         m_process->terminate();
         m_process->waitForFinished(1000);
@@ -24,6 +24,8 @@ void PythonRunner::runScript(const QString& scriptContent) {
 
     m_outputWidget->clear();
     m_process->start("python3", QStringList() << "-u" << "-c" << scriptContent);
+
+    return true;
 }
 
 void PythonRunner::stopScript() {
diff --git a/pythonrunner.h b/pythonrunner.h
index 3855486..8a8ac15 100644
--- a/pythonrunner.h
+++ b/pythonrunner.h
@@ -3,6 +3,7 @@
 #include <QTextEdit>
 #include <QProcess>
 #include <QObject>
+#include <QTemporaryDir>
 
 class PythonRunner : public QObject {
     Q_OBJECT
@@ -11,7 +12,7 @@ public:
     PythonRunner(QTextEdit* outputWidget, QObject* parent = nullptr);
     ~PythonRunner();
 
-    void runScript(const QString& scriptContent);
+    bool runScript(const QString& scriptContent);
     void stopScript();
 
 private slots:
@@ -25,4 +26,6 @@ signals:
 private:
     QTextEdit* m_outputWidget;
     QProcess* m_process;
+    bool ready;
+    QTemporaryDir dir;
 };
diff --git a/triggerwidget.cpp b/triggerwidget.cpp
index efa6627..f051768 100644
--- a/triggerwidget.cpp
+++ b/triggerwidget.cpp
@@ -70,9 +70,46 @@ void TriggerWidget::onLevelToggled(bool checked)
     updateTriggerState();
 }
 
+void TriggerWidget::updateSate(uint16_t serial, uint16_t trigger, trigger_state_t state)
+{
+    if (serial == deviceSerial && trigger == triggerNumber) {
+        switch (state)
+        {
+        case TRIGGER_INPUT:
+            levelCheckbox.blockSignals(true);
+            levelCheckbox.setChecked(false);
+            levelCheckbox.setEnabled(false);
+            levelCheckbox.blockSignals(false);
+            inputCheckbox.blockSignals(true);
+            inputCheckbox.setChecked(true);
+            inputCheckbox.blockSignals(false);
+            break;
+        case TRIGGER_HIGH:
+            inputCheckbox.blockSignals(true);
+            inputCheckbox.setChecked(false);
+            inputCheckbox.blockSignals(false);
+            levelCheckbox.blockSignals(true);
+            levelCheckbox.setChecked(true);
+            levelCheckbox.setEnabled(true);
+            levelCheckbox.blockSignals(false);
+            break;
+        case TRIGGER_LOW:
+            inputCheckbox.blockSignals(true);
+            inputCheckbox.setChecked(false);
+            inputCheckbox.blockSignals(false);
+            levelCheckbox.blockSignals(true);
+            levelCheckbox.setChecked(true);
+            levelCheckbox.setEnabled(false);
+            levelCheckbox.blockSignals(false);
+        default:
+            break;
+        }
+    }
+}
+
 void TriggerWidget::updateTriggerState()
 {
-    trigger_state_t state;
+    trigger_state_t state = TRIGGER_INPUT;
     if(inputCheckbox.isChecked())
     {
         levelCheckbox.blockSignals(true);
diff --git a/triggerwidget.h b/triggerwidget.h
index 718ed1b..0fe17cb 100644
--- a/triggerwidget.h
+++ b/triggerwidget.h
@@ -22,6 +22,7 @@ public:
 
     uint16_t getDeviceSerial() const;
     uint16_t getTriggerNumber() const;
+    void updateSate(uint16_t serial, uint16_t trigger, trigger_state_t state);
 
 private slots:
     void onInputToggled(bool checked);