diff --git a/MainCode/adalm1000_logger.py b/MainCode/adalm1000_logger.py
index 801be9b..2fa3d24 100644
--- a/MainCode/adalm1000_logger.py
+++ b/MainCode/adalm1000_logger.py
@@ -17,23 +17,6 @@ from PyQt5.QtWidgets import (QApplication, QMainWindow, QWidget, QVBoxLayout, QH
 from PyQt5.QtCore import Qt, QTimer, pyqtSignal, pyqtSlot, QObject, QThread
 from PyQt5 import sip
 import pysmu
-import pysmu.libsmu
-from pysmu.exceptions import SessionError
-
-class PatchedSession(pysmu.Session):
-    def __init__(self, ignore_dataflow=False, queue_size=0):
-        try:
-            super().__init__(ignore_dataflow=ignore_dataflow, queue_size=queue_size)
-        except SessionError as e:
-            if "failed scanning" in str(e):
-                print("Warning: Session initialization quirk, continuing...")
-            else:
-                raise
-        finally:  # Ensure scan happens regardless of exception
-            self.scan()  # Move scan into finally block
-            
-        if not self.devices:
-            print("No devices found after manual scan")
 
 class DeviceManager:
     def __init__(self, dev):
@@ -70,11 +53,31 @@ class DeviceManager:
             'time': [], 'voltage': [], 'current': [], 'count': 0, 'last_plot_time': 0
         }
 
+        self.consecutive_read_errors = 0  # Track read failures
+        self.max_consecutive_errors = 5   # Threshold before reset
+    
+    def handle_read_error(self, increment=1):
+        """Handle read errors with automatic reset"""
+        self.consecutive_read_errors += increment
+        
+        if self.consecutive_read_errors >= self.max_consecutive_errors:
+            try:
+                print("Resetting device due to persistent errors")
+                self.dev.session.end()
+                time.sleep(0.5)
+                self.dev.session = PatchedSession()
+                self.dev.session.start(0)
+                return True  # Recovery attempted
+            except Exception as e:
+                print(f"Device reset failed: {e}")
+                return False  # Unrecoverable error
+        return True  # Under threshold - continue
+
     def start_measurement(self, interval=0.1):
         if self.measurement_thread and self.measurement_thread.isRunning():
             self.measurement_thread.stop()
-           
-        self.measurement_thread = MeasurementThread(self.dev, interval)
+        
+        self.measurement_thread = MeasurementThread(self.dev, interval, self)  # Pass self as parent_manager
         self.measurement_thread.start()
         self.is_running = True
 
@@ -109,7 +112,7 @@ class MeasurementThread(QThread):
     update_signal = pyqtSignal(float, float, float)
     error_signal = pyqtSignal(str)
     
-    def __init__(self, device, interval=0.1):
+    def __init__(self, device, interval, parent_manager):  # Add parent_manager
         super().__init__()
         self.device = device 
         self.interval = interval
@@ -120,47 +123,35 @@ class MeasurementThread(QThread):
         self.start_time = None
         self.measurement_queue = Queue(maxsize=1)
         self.current_direction = 1  # 1 for source, -1 for sink
+        self.parent_manager = parent_manager 
     
     def run(self):
-        """Continuous measurement loop"""
+        """Continuous measurement loop with enhanced error handling"""
         self._running = True
-        if self.start_time is None:
-            self.start_time = time.time()
+        self.start_time = time.time()
+        consecutive_errors = 0
+        max_consecutive_errors = 5
+        
         while self._running:
             try:
                 samples = self.device.read(self.filter_window_size, 500, True)
 
-                 # --- VOLLSTÄNDIGER DEBUG-REPLACEMENT AB HIER ---
-                print(f"\n{'='*50}")
-                print(f"DEBUG: Neue Messung - Zeit: {time.time():.3f}")
-                print(f"DEBUG: Anzahl empfangener Samples: {len(samples) if samples else 'None'}")
-                
+                # --- Handle empty samples ---
                 if not samples:
-                    print("DEBUG: FEHLER - Keine Samples empfangen!")
-                    raise DeviceDisconnectedError("No samples received")
-                
-                # Zeige die komplette Struktur der ersten 3 Samples
-                for i, sample in enumerate(samples[:3]):
-                    print(f"DEBUG: Sample[{i}] = {sample}")
-                    if len(sample) >= 2:
-                        print(f"  Channel A: Strom={sample[0][1]:.6f}A, Spannung={sample[0][0]:.6f}V")
-                        print(f"  Channel B: Strom={sample[1][1]:.6f}A, Spannung={sample[1][0]:.6f}V")
-                
-                # Berechne raw_voltage und zeige Zwischenergebnisse
-                voltage_values = [s[1][0] for s in samples]
-                raw_voltage = np.mean(voltage_values)
-                print(f"DEBUG: Channel B Spannung - Werte: {voltage_values}, Mittelwert: {raw_voltage:.6f}V")
-                
-                # Berechne raw_current und zeige Zwischenergebnisse  
-                current_values = [s[0][1] for s in samples]
-                raw_current = np.mean(current_values) * self.current_direction
-                print(f"DEBUG: Channel A Strom - Werte: {current_values}, Mittelwert: {np.mean(current_values):.6f}A, mit Richtung: {raw_current:.6f}A")
-                print(f"{'='*50}")
-                # --- DEBUG-ENDE ---
-
-                if not samples:
-                    raise DeviceDisconnectedError("No samples received")
+                    consecutive_errors += 1
+                    if consecutive_errors >= max_consecutive_errors:
+                        # Attempt device reset through parent manager
+                        if hasattr(self, 'parent_manager'):
+                            if not self.parent_manager.handle_read_error():
+                                raise DeviceDisconnectedError("Persistent read failures")
+                        consecutive_errors = 0  # Reset after handling
+                    time.sleep(0.1)
+                    continue
+                    
+                # Reset error counter on successful read
+                consecutive_errors = 0
                 
+                # --- Process samples ---
                 current_time = time.time() - self.start_time
                 
                 # Get voltage from Channel B (HI_Z mode) and current from Channel A
@@ -178,11 +169,11 @@ class MeasurementThread(QThread):
                 voltage = np.mean(self.voltage_window)
                 current = np.mean(self.current_window)
                 
-                # Validate measurements
-                if voltage is None or not (-1.0 <= voltage <= 6.0):
-                    raise ValueError(f"Invalid voltage: {voltage}V")
-                if not (-0.25 <= current <= 0.25):
-                    raise ValueError(f"Invalid current: {current}A")
+                # Validate measurements before processing
+                if not (0.0 <= voltage <= 5.0):  # ADALM1000 voltage range
+                    raise ValueError(f"Voltage out of range: {voltage:.4f}V")
+                if not (-0.25 <= current <= 0.25):  # ADALM1000 current range
+                    raise ValueError(f"Current out of range: {current:.4f}A")
                 
                 # Emit update
                 self.update_signal.emit(voltage, current, current_time)
@@ -191,14 +182,32 @@ class MeasurementThread(QThread):
                 try:
                     self.measurement_queue.put_nowait((voltage, current))
                 except Full:
-                    pass
+                    pass  # It's OK to skip if queue is full
                 
+                # Adaptive sleep based on interval
                 time.sleep(max(0.05, self.interval))
                 
+            except DeviceDisconnectedError as e:
+                self.error_signal.emit(f"Device disconnected: {str(e)}")
+                break
+            except ValueError as e:
+                # Skip invalid measurements but log first occurrence
+                if consecutive_errors == 0:
+                    self.error_signal.emit(f"Measurement error: {str(e)}")
+                consecutive_errors += 1
+                time.sleep(0.1)
             except Exception as e:
                 self.error_signal.emit(f"Read error: {str(e)}")
+                consecutive_errors += 1
                 time.sleep(1)
-                continue
+                
+                # Handle persistent errors
+                if consecutive_errors >= max_consecutive_errors:
+                    if hasattr(self, 'parent_manager'):
+                        if not self.parent_manager.handle_read_error():
+                            self.error_signal.emit("Critical error - stopping measurement")
+                            break
+                    consecutive_errors = 0
 
     def set_direction(self, direction):
         """Set current direction (1 for source, -1 for sink)"""
@@ -1039,7 +1048,7 @@ class BatteryTester(QMainWindow):
         self.main_layout.addWidget(self.canvas, 1)
 
     def init_device(self):
-        """Initialize all ADALM1000 with proper permission handling"""
+        """Initialize ADALM1000 devices with proper error handling"""
         try:
             # Cleanup previous session
             if hasattr(self, 'session'):
@@ -1047,30 +1056,34 @@ class BatteryTester(QMainWindow):
                     self.session.end()
                 except:
                     pass
-                del self.session
 
-            self.session = PatchedSession(ignore_dataflow=True, queue_size=10000)
+            self.session = pysmu.Session(ignore_dataflow=True, queue_size=10000)
+            
+            # Retry mechanism with progress feedback
+            retry_count = 0
+            while not self.session.devices and retry_count < 3:
+                self.status_bar.showMessage(f"Scanning for devices... (Attempt {retry_count + 1}/3)")
+                QApplication.processEvents()  # Update UI
+                time.sleep(1)
+                self.session.scan()  # Manual scan
+                retry_count += 1
 
             if not self.session.devices:
-                self.status_bar.showMessage("No ADALM1000 devices found")
-                self.session_active = False
-                self.active_device = None  # Sicherstellen, dass es None ist
+                self.handle_no_devices()
                 return
-            
+                
             self.session.start(0)
-            self.devices.clear()
+            self.devices = {}
             for dev in self.session.devices:
                 manager = DeviceManager(dev)
                 manager.start_measurement(interval=self.interval)
                 self.devices[dev.serial] = manager
 
-            self.session.start(0)
-
-            # Erstes Gerät aktivieren
-            first_serial = self.session.devices[0].serial
+            # Select first device
+            first_serial = next(iter(self.devices.keys()))
             self.active_device = self.devices[first_serial]
 
-            # UI aktualisieren
+            # Update UI
             self.device_combo.clear()
             for serial in self.devices:
                 self.device_combo.addItem(serial)
@@ -1081,13 +1094,26 @@ class BatteryTester(QMainWindow):
             self.status_light.setStyleSheet("background-color: green; border-radius: 10px;")
             self.start_button.setEnabled(True)
 
-            # Starte Mess-Update für aktives Gerät
+            # Connect measurement signals
             self.measurement_thread = self.active_device.measurement_thread
             self.measurement_thread.update_signal.connect(self.update_measurements)
             self.measurement_thread.error_signal.connect(self.handle_device_error)
 
         except Exception as e:
-            self.handle_device_error(str(e))
+            self.handle_device_error(f"Initialization failed: {str(e)}")
+
+    def handle_no_devices(self):
+        """Handle case when no devices are found"""
+        self.session_active = False
+        self.active_device = None
+        self.status_bar.showMessage("No ADALM1000 devices found")
+        self.status_light.setStyleSheet("background-color: red; border-radius: 10px;")
+        self.start_button.setEnabled(False)
+        self.device_combo.clear()
+        
+        # Show reconnect button
+        self.reconnect_btn.setEnabled(True)
+        self.reconnect_btn.setVisible(True)
 
     def request_usb_permissions(self):
         """Handle USB permission issues with user interaction"""
@@ -1219,7 +1245,9 @@ class BatteryTester(QMainWindow):
 
     @pyqtSlot(float, float, float)
     def update_measurements(self, voltage, current, current_time):
-        if not self.active_device:
+        # Add measurement validation
+        if not self.validate_measurements(voltage, current):
+            print(f"Invalid measurement: V={voltage:.4f}, I={current:.4f}")
             return
         
         dev_manager = self.active_device
@@ -2301,16 +2329,20 @@ class BatteryTester(QMainWindow):
         self.update_plot()
 
     def update_plot(self):
-        """More robust plotting with error handling"""
+        """Fixed plot method with safe attribute access"""
         try:
+            if not self.active_device:
+                return
+                
             # Create local copies of data safely
             with self.plot_mutex:
-                if not self.display_time_data:
+                dev = self.active_device
+                if not dev.display_time_data:
                     return
                     
-                x_data = np.array(self.display_time_data)
-                y1_data = np.array(self.display_voltage_data)
-                y2_data = np.array(self.display_current_data)
+                x_data = list(dev.display_time_data)
+                y1_data = list(dev.display_voltage_data)
+                y2_data = list(dev.display_current_data)
             
             # Update plot data
             self.line_voltage.set_data(x_data, y1_data)
@@ -2326,7 +2358,10 @@ class BatteryTester(QMainWindow):
         except Exception as e:
             print(f"Plot error: {e}")
             # Attempt to recover
-            self.reset_plot()
+            try:
+                self.reset_plot()
+            except:
+                pass
 
     def auto_scale_axes(self):
         """Auto-scale plot axes with appropriate padding and strict boundaries"""
@@ -2360,24 +2395,30 @@ class BatteryTester(QMainWindow):
 
     @pyqtSlot(str)
     def handle_device_error(self, error_msg):
-        """Handle device errors gracefully"""
-        print(f"EXAKTER FEHLER: {error_msg}")
-        self.status_bar.showMessage(f"Device error: {error_msg}")
-        self.status_light.setStyleSheet("background-color: red; border-radius: 10px;")
-        self.session_active = False
-        self.test_running = False
-        self.measuring = False
-        self.start_button.setEnabled(False)
-        self.stop_button.setEnabled(False)
+        """Enhanced error handling with recovery"""
+        print(f"DEVICE ERROR: {error_msg}")
         
-        # Clear device-specific data ONLY if we have an active device
-        if self.active_device:
-            data = self.active_device
-            with self.plot_mutex:
-                data.time_data.clear()
-                data.voltage_data.clear()
-                data.current_data.clear()
-            self.update_plot()
+        # Special handling for USB errors
+        if "USB" in error_msg or "LIBUSB" in error_msg.upper():
+            error_msg += "\n\nCheck USB connection and permissions"
+            self.status_light.setStyleSheet("background-color: red;")
+        else:
+            self.status_light.setStyleSheet("background-color: orange;")
+            
+        self.status_bar.showMessage(f"Device error: {error_msg}")
+        
+        # Attempt automatic recovery for non-critical errors
+        if "No samples" in error_msg or "timed out" in error_msg:
+            QTimer.singleShot(1000, self.reconnect_device)
+    
+    def validate_measurements(self, voltage, current):
+        """Filter out invalid measurements"""
+        # Fix negative values caused by connection issues
+        if voltage < 0 or not (0 <= voltage <= 5.0):
+            return False
+        if abs(current) > 0.3:  # Beyond ADALM1000's ±200mA range
+            return False
+        return True
         
     @pyqtSlot(str)
     def update_test_phase(self, phase_text):
@@ -2434,52 +2475,129 @@ class BatteryTester(QMainWindow):
         QTimer.singleShot(1000, self.reconnect_device)
 
     def reconnect_device(self):
-        if hasattr(self, 'measurement_thread'):
-            self.measurement_thread.stop()
-            self.measurement_thread.wait(500)
+        """Robuste Geräte-Neuerkennung mit vollständigem Reset und Statusfeedback"""
+        self.status_bar.showMessage("Starting device reconnection...")
+        self.status_light.setStyleSheet("background-color: orange; border-radius: 10px;")
+        QApplication.processEvents()  # Sofortiges UI-Update erzwingen
 
+        # 1. Vorhandene Verbindungen sauber beenden
         try:
-            self.session = PatchedSession(ignore_dataflow=True, queue_size=10000)
-            if not self.session.devices:
-                raise DeviceDisconnectedError("No devices found")
-
-            new_serials = {dev.serial for dev in self.session.devices}
-            old_serials = set(self.devices.keys())
-
-            # Neue hinzufügen
-            for dev in self.session.devices:
-                if dev.serial not in self.devices:
-                    manager = DeviceManager(dev)
-                    manager.start_measurement(self.interval)
-                    self.devices[dev.serial] = manager
-
-            # Entfernte entfernen
-            for serial in list(self.devices.keys()):
-                if serial not in new_serials:
-                    self.devices[serial].stop_measurement()
-                    del self.devices[serial]
-
-            # Aktualisiere UI
-            current_serial = self.active_device.serial if self.active_device else None
-            self.device_combo.clear()
-            for serial in self.devices:
-                self.device_combo.addItem(serial)
-
-            if current_serial in self.devices:
-                self.device_combo.setCurrentText(current_serial)
-                self.active_device = self.devices[current_serial]
-            else:
-                first = next(iter(self.devices))
-                self.device_combo.setCurrentText(first)
-                self.active_device = self.devices[first]
-
-            self.measurement_thread = self.active_device.measurement_thread
-            self.measurement_thread.update_signal.connect(self.update_measurements)
-
-            self.connection_label.setText(f"Reconnected: {self.active_device.serial}")
-            self.status_bar.showMessage("Reconnected all devices")
+            if hasattr(self, 'measurement_thread'):
+                self.measurement_thread.stop()
+                if not self.measurement_thread.wait(1000):  # Timeout 1s
+                    self.measurement_thread.terminate()
         except Exception as e:
-            QTimer.singleShot(2000, self.reconnect_device)
+            print(f"Error stopping measurement thread: {e}")
+
+        # 2. Alte Session bereinigen
+        if hasattr(self, 'session'):
+            try:
+                self.session.end()
+            except Exception as e:
+                print(f"Error ending session: {e}")
+            finally:
+                del self.session
+
+        # 3. Neue Session mit Fortschrittsfeedback
+        retry_count = 0
+        max_retries = 3
+        reconnect_delay = 2000  # ms
+        
+        while retry_count < max_retries:
+            try:
+                self.status_bar.showMessage(f"Scanning for devices (Attempt {retry_count + 1}/{max_retries})...")
+                QApplication.processEvents()
+                
+                # Neue Session erstellen
+                self.session = pysmu.Session(ignore_dataflow=True, queue_size=10000)
+                
+                # Manueller Scan mit Timeout
+                scan_success = False
+                for _ in range(2):  # Max 2 Scan-Versuche
+                    self.session.scan()
+                    if self.session.devices:
+                        scan_success = True
+                        break
+                    time.sleep(0.5)
+                
+                if not scan_success:
+                    raise DeviceDisconnectedError("No devices detected")
+
+                # 4. Geräteliste aktualisieren
+                current_devices = {dev.serial: dev for dev in self.session.devices}
+                old_devices = self.devices.copy() if hasattr(self, 'devices') else {}
+
+                # Neue Geräte hinzufügen
+                new_devices = {}
+                for serial, dev in current_devices.items():
+                    if serial in old_devices:
+                        # Bestehendes Gerät wiederverwenden
+                        new_devices[serial] = old_devices[serial]
+                    else:
+                        # Neues Gerät initialisieren
+                        self.status_bar.showMessage(f"Initializing device {serial}...")
+                        QApplication.processEvents()
+                        manager = DeviceManager(dev)
+                        manager.start_measurement(self.interval)
+                        new_devices[serial] = manager
+
+                # Nicht mehr vorhandene Geräte entfernen
+                for serial, manager in old_devices.items():
+                    if serial not in current_devices:
+                        try:
+                            manager.stop_measurement()
+                        except Exception as e:
+                            print(f"Error stopping device {serial}: {e}")
+
+                self.devices = new_devices
+
+                # 5. Aktives Gerät auswählen
+                current_serial = self.active_device.serial if (hasattr(self, 'active_device') and self.active_device) else None
+                
+                # UI aktualisieren
+                self.device_combo.clear()
+                for serial in self.devices:
+                    self.device_combo.addItem(serial)
+
+                if current_serial in self.devices:
+                    self.device_combo.setCurrentText(current_serial)
+                    self.active_device = self.devices[current_serial]
+                elif self.devices:
+                    first_serial = next(iter(self.devices))
+                    self.device_combo.setCurrentText(first_serial)
+                    self.active_device = self.devices[first_serial]
+                else:
+                    raise DeviceDisconnectedError("No valid devices available")
+
+                # Signalverbindungen herstellen
+                if hasattr(self.active_device, 'measurement_thread'):
+                    self.measurement_thread = self.active_device.measurement_thread
+                    self.measurement_thread.update_signal.connect(self.update_measurements)
+                    self.measurement_thread.error_signal.connect(self.handle_device_error)
+
+                # Erfolgsmeldung
+                self.connection_label.setText(f"Connected: {self.active_device.serial}")
+                self.status_bar.showMessage("Successfully reconnected devices")
+                self.status_light.setStyleSheet("background-color: green; border-radius: 10px;")
+                self.start_button.setEnabled(True)
+                return
+
+            except DeviceDisconnectedError as e:
+                retry_count += 1
+                if retry_count < max_retries:
+                    self.status_bar.showMessage(f"Reconnect failed: {e}. Retrying in {reconnect_delay/1000}s...")
+                    QApplication.processEvents()
+                    time.sleep(reconnect_delay/1000)
+                else:
+                    self.status_bar.showMessage(f"Reconnect failed after {max_retries} attempts")
+                    self.status_light.setStyleSheet("background-color: red; border-radius: 10px;")
+                    QTimer.singleShot(reconnect_delay, self.attempt_reconnect)
+            except Exception as e:
+                print(f"Critical reconnect error: {traceback.format_exc()}")
+                self.status_bar.showMessage(f"Critical error: {str(e)}")
+                self.status_light.setStyleSheet("background-color: red; border-radius: 10px;")
+                QTimer.singleShot(reconnect_delay, self.attempt_reconnect)
+                return
 
     def closeEvent(self, event):
         """Clean up on window close"""