diff --git a/hardwaresetup.cpp b/hardwaresetup.cpp
index 1b37840..217a4eb 100644
--- a/hardwaresetup.cpp
+++ b/hardwaresetup.cpp
@@ -323,8 +323,8 @@ void HardwareSetup::run() {
         cout << "Port opened" << endl;
 
         // prepare buffer
-        struct TransStruct * received;
-        uint8_t uintBuf[4 * 6];
+        struct TransCheck * received;
+        uint8_t uintBuf[4 * 6 + 2];
         void * voidBuf;
 
         // configure among others non-canonical mode (important)
@@ -334,7 +334,7 @@ void HardwareSetup::run() {
         tcsetattr(fd, TCSANOW, &config);
 
         // read raw data to buffer
-        ssize_t length = read(fd, uintBuf, 24);
+        ssize_t length = read(fd, uintBuf, 24 + 2);
 
         // flush existing data
         if (length < 24) {
@@ -345,47 +345,66 @@ void HardwareSetup::run() {
 
             // read data
             cout << "try to read data" << endl;
-            read(this->fd, uintBuf, 4 * 6);
+            read(this->fd, uintBuf, 4 * 6 + 2);
             cout << "data read" << endl;
             voidBuf = static_cast<void *>(uintBuf);
-            received = static_cast<struct TransStruct *>(voidBuf);
+            received = static_cast<struct TransCheck *>(voidBuf);
 
-            usleep(150000); // 150ms
+            usleep(50000); // 150ms
 
             for (int i = 0; i < 6; i++) {
-                if (received[i].update != 0) {
-                    switch (received[i].id) {
-                    case 0:
-                        cout << "Shell Zeit 1: "
-                             << static_cast<int>(received[i].time) << endl;
-                        emit Shell(static_cast<int>(received[i].time), 1);
-                        break;
-                    case 1:
-                        cout << "Dea Zeit 1: "
-                             << static_cast<int>(received[i].time) << endl;
-                        emit Dea(static_cast<int>(received[i].time), 1);
-                        break;
-                    case 2:
-                        cout << "Shell Zeit 2: "
-                             << static_cast<int>(received[i].time) << endl;
-                        emit Shell(static_cast<int>(received[i].time), 2);
-                        break;
-                    case 3:
-                        cout << "Dea Zeit 2: "
-                             << static_cast<int>(received[i].time) << endl;
-                        emit Dea(static_cast<int>(received[i].time), 2);
-                        break;
-                    case 4:
-                        cout << "Shell Zeit 2: "
-                             << static_cast<int>(received[i].time) << endl;
-                        emit Shell(static_cast<int>(received[i].time), 3);
-                        break;
-                    case 5:
-                        cout << "Dea Zeit 3: "
-                             << static_cast<int>(received[i].time) << endl;
-                        emit Dea(static_cast<int>(received[i].time), 3);
-                        break;
+                if (received->begin == '#' && received->end == '!') {
+
+                    if (received->data[i].update != 0) {
+                        switch (received->data[i].id) {
+                        case 0:
+                            cout << "Shell Zeit 1: "
+                                 << static_cast<int>(received->data[i].time)
+                                 << endl;
+                            emit Shell(static_cast<int>(received->data[i].time),
+                                       1);
+                            break;
+                        case 1:
+                            cout << "Dea Zeit 1: "
+                                 << static_cast<int>(received->data[i].time)
+                                 << endl;
+                            emit Dea(static_cast<int>(received->data[i].time),
+                                     1);
+                            break;
+                        case 2:
+                            cout << "Shell Zeit 2: "
+                                 << static_cast<int>(received->data[i].time)
+                                 << endl;
+                            emit Shell(static_cast<int>(received->data[i].time),
+                                       2);
+                            break;
+                        case 3:
+                            cout << "Dea Zeit 2: "
+                                 << static_cast<int>(received->data[i].time)
+                                 << endl;
+                            emit Dea(static_cast<int>(received->data[i].time),
+                                     2);
+                            break;
+                        case 4:
+                            cout << "Shell Zeit 2: "
+                                 << static_cast<int>(received->data[i].time)
+                                 << endl;
+                            emit Shell(static_cast<int>(received->data[i].time),
+                                       3);
+                            break;
+                        case 5:
+                            cout << "Dea Zeit 3: "
+                                 << static_cast<int>(received->data[i].time)
+                                 << endl;
+                            emit Dea(static_cast<int>(received->data[i].time),
+                                     3);
+                            break;
+                        }
                     }
+                } // dataframe ok
+                else {
+                    // dataframe not ok
+                    tcflush(fd, TCIFLUSH);
                 }
             }
         }
diff --git a/hardwaresetup.h b/hardwaresetup.h
index 39cd6b6..68a5ab2 100644
--- a/hardwaresetup.h
+++ b/hardwaresetup.h
@@ -6,7 +6,7 @@
 #include <stdio.h>
 #include <string.h>
 #ifdef ATMEGA
-    #include <usb.h>
+#include <usb.h>
 #endif
 struct TransStruct {
     uint16_t time;
@@ -14,6 +14,12 @@ struct TransStruct {
     uint8_t update;
 };
 
+struct TransCheck {
+    char begin;
+    struct TransStruct data[6];
+    char end;
+};
+
 class HardwareSetup : public QThread {
     Q_OBJECT
   protected: