diff --git a/libguh/hardware/gpio.cpp b/libguh/hardware/gpio.cpp
index d036faec..6ce72cbd 100644
--- a/libguh/hardware/gpio.cpp
+++ b/libguh/hardware/gpio.cpp
@@ -96,9 +96,9 @@ int Gpio::openGpio()
     int fd = open(buf, O_RDONLY | O_NONBLOCK );
     if (fd < 0) {
         qDebug() << "ERROR: could not open /sys/class/gpio" << m_gpio << "/direction";
-        return fd;
+        return false;
     }
-    return fd;
+    return true;
 }
 
 /*! Returns true, if the direction \a dir of the GPIO could be set correctly.
diff --git a/libguh/hardware/radio433.h b/libguh/hardware/radio433.h
index eba0a1ab..c1500258 100644
--- a/libguh/hardware/radio433.h
+++ b/libguh/hardware/radio433.h
@@ -31,6 +31,7 @@ public:
     explicit Radio433(QObject *parent = 0);
     ~Radio433();
 
+    bool available();
     bool enabel();
     bool disabel();
 
diff --git a/libguh/hardware/radio433transmitter.h b/libguh/hardware/radio433transmitter.h
index 9211cf27..16d63161 100644
--- a/libguh/hardware/radio433transmitter.h
+++ b/libguh/hardware/radio433transmitter.h
@@ -37,6 +37,7 @@ public:
 
     bool startTransmitter();
     bool stopTransmitter();
+    bool setUpGpio();
 
     void sendData(QList<int> rawData);
 
@@ -51,7 +52,6 @@ private:
     bool m_allowSending;
 
     void run();
-    bool setUpGpio();
 
     QMutex m_queueMutex;
     QQueue<QList<int> > m_rawDataQueue;