diff --git a/mainwindow.cpp b/mainwindow.cpp
index e15d861..367718a 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -33,6 +33,8 @@ MainWindow::MainWindow(QWidget *parent) :
     paused = false;
     commandDone = false;
     checkingTemperature = true;
+    injectingCommand = false;
+    userCommand = "";
     currentLine = 0;
 
     serialupdate();
@@ -419,7 +421,14 @@ void MainWindow::on_sendBtn_clicked()
 
 void MainWindow::sendNext()
 {
-    if(sending && !paused && printer.bytesToWrite() < 100 && commandDone)
+    if(injectingCommand && commandDone && printer.bytesToWrite() < 100)
+    {
+        sendLine(userCommand);
+        commandDone=false;
+        injectingCommand=false;
+        return;
+    }
+    else if(sending && !paused && printer.bytesToWrite() < 100 && commandDone)
     {
         if(currentLine >= gcode.size()) //check if we are at the end of array
         {
@@ -454,7 +463,7 @@ void MainWindow::on_pauseBtn_clicked()
 
 void MainWindow::checkStatus()
 {
-    if(checkingTemperature && (sinceLastTemp.elapsed() < statusTimer.interval())) sendLine("M105");
+    if(checkingTemperature && (sinceLastTemp.elapsed() < statusTimer.interval())) injectCommand("M105");
 }
 
 void MainWindow::on_checktemp_stateChanged(int arg1)
@@ -482,6 +491,12 @@ void MainWindow::on_actionAbout_triggered()
     aboutwindow.exec();
 }
 
+void MainWindow::injectCommand(QString command)
+{
+    injectingCommand = true;
+    userCommand = command;
+}
+
 void MainWindow::updateRecent()
 {
 
diff --git a/mainwindow.h b/mainwindow.h
index 89329a0..c01202d 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -46,7 +46,9 @@ private:
     bool paused;
     bool commandDone;
     bool checkingTemperature;
+    bool injectingCommand;
     int currentLine;
+    QString userCommand;
 
 
 private slots:
@@ -61,6 +63,7 @@ private slots:
     void sendNext();
     void checkStatus();
     void updateRecent();
+    void injectCommand(QString command);
 
     void xplus();
     void yplus();