diff --git a/src/hwapi.cpp b/src/hwapi.cpp
index 843e3d6..74e0262 100755
--- a/src/hwapi.cpp
+++ b/src/hwapi.cpp
@@ -138,39 +138,35 @@ hwapi::hwapi(QObject *parent) : QObject(parent)
 
 void hwapi::onCCWakeGpioChanged(QString const &fileName) {
     if (fileName == m_watchedFile) {
+        qCritical() << __func__ << ":" << __LINE__ << " " << m_watchedFile;
         QFile f(m_watchedFile);
-        if (f.open(QFile::ReadOnly | QFile::Text)) {
+        if (f.exists() && f.open(QFile::ReadOnly | QFile::Text)) {
             QTextStream stream(&f);
             QString const &content = stream.readAll();
             if (content.startsWith("0")) {
-                qCritical() << __func__ << ":" << __LINE__ << "switching terminal off...";
-                mod_switchWake(false);
-                mod_switchPower(false);
-                f.close();
-                f.setFileName(m_watchedFile);
-                // to turn off cc-terminal, the content must be "0"
-                if (f.open(QFile::WriteOnly | QIODevice::Truncate | QIODevice::Text)) {
-                    QTextStream s(&f);
-                    s << "switching terminal off";
-                }
+                qCritical() << __func__ << ":" << __LINE__ << "switching cc-terminal off...";
+                credit_switchWake(false);
+                credit_switchPower(false);
             } else
             if (content.startsWith("1")) {
-                qCritical() << __func__ << ":" << __LINE__ << "switching terminal on...";
-                mod_switchPower(true);
-                mod_switchWake(true);
-                f.close();
-                f.setFileName(m_watchedFile);
-                // to turn on cc-terminal, the content must be "1"
-                if (f.open(QFile::WriteOnly | QIODevice::Truncate | QIODevice::Text)) {
-                    QTextStream s(&f);
-                    s << "switching terminal on";
-                }
+                qCritical() << __func__ << ":" << __LINE__ << "switching cc-terminal on...";
+                credit_switchPower(true);
+                credit_switchWake(true);
+            } else
+            if (content.startsWith("2")) {
+                qCritical() << __func__ << ":" << __LINE__ << "switching cc-terminal off and on...";
+                credit_switchWake(false);
+                credit_switchPower(false);
+                QThread::sleep(1);
+                credit_switchPower(true);
+                credit_switchWake(true);
             } else {
-                qCritical() << "watched file contained" << content;
+                qCritical() << "switching cc-terminal watched file contained" << content;
+                QFile::resize(m_watchedFile, 0); // empty file
             }
         }
     } else {
-        qCritical() << "ERROR watching the wrong file" << fileName;
+        qCritical() << "ERROR watching the wrong file" << fileName << m_watchedFile;
     }
 }