final commit? looks like it works

src/qml/pages/FirstPage.qml

@@ -49,7 +49,7 @@ Page {
             anchors.horizontalCenter: parent.horizontalCenter
             Button {
                 id: startButton
-                text: mainPage.isInitialized ? "Stop" : "Start"
+                text: mainPage.isRunning ? "Stop" : "Start"
                 onClicked: {
                     if(mainPage.isRunning){
                         mainPage.isRunning = false;

src/qml/pages/SecondPage.qml

@@ -70,6 +70,7 @@ Page {
         Switch {
             id: noiseToggle
             anchors.right: parent.right
+            checked: true
             anchors.rightMargin: Theme.horizontalPageMargin
             onCheckedChanged: {
                 mlx90640.stubMode = checked