diff --git a/src/controlBus.cpp b/src/controlBus.cpp
index 536c667..e7a500f 100644
--- a/src/controlBus.cpp
+++ b/src/controlBus.cpp
@@ -15,16 +15,20 @@ static uint8_t    rs_connect;       // 0,1
 
 void epi_setSerial(int BaudNr, QString BaudStr, QString ComName, uint8_t connect)
 {
+//    qDebug() << "ENTER" << BaudNr << BaudStr << ComName << connect;
+
     rs_comportName = ComName;
     rs_baudStr     = BaudStr;
     rs_baudNr      = BaudNr;    // 0=1200  1=9600  2=19200  3=38400  4=57600  5=115200  oder -1
     rs_connect     = connect;     // 0/1
 
+//    qDebug() << "LEAVE" << rs_baudNr << rs_baudStr << rs_comportName << rs_connect;
 }
 
 void epi_closeSerial(void)
 {
     rs_connect=0;
+//    qDebug() << "ENTER/LEAVE rc_connect=0";
 }
 
 
@@ -32,6 +36,7 @@ void gpi_serialChanged(void)
 {
     // serial confirms that port was closed or opened
     rs_connect=2;   // Flanke, nur 1x öffnen/schließen
+    //qDebug() << "ENTER/LEAVE rc_connect=2";
 }
 
 uint8_t gpi_getSerialConn(void)
@@ -54,12 +59,14 @@ static bool rs_portIsOpen;
 
 void gpi_serialIsOpen(bool offen)
 {
+    //qDebug() << "ENTER/LEAVE offen=" << offen;
     rs_portIsOpen=offen;
 }
 
 bool epi_isSerialPortOpen()
 {
     // true: port is open   false: port is closed
+    //qDebug() << "ENTER/LEAVE offen=" << rs_portIsOpen;
     return rs_portIsOpen;
 }