diff --git a/example.py b/example.py
index 5753754..e89ef7b 100644
--- a/example.py
+++ b/example.py
@@ -10,11 +10,12 @@
 from ppk2_api.ppk2_api import PPK2_API
 
 ppk2s_connected = PPK2_API.list_devices()
-if(len(ppk2s_connected) == 1):
-    ppk2_port = ppk2s_connected[0]
-    print(f'Found PPK2 at {ppk2_port}')
+if len(ppk2s_connected) == 1:
+    ppk2_port = ppk2s_connected[0][0]
+    ppk2_serial = ppk2s_connected[0][1]
+    print(f"Found PPK2 at {ppk2_port} with serial number {ppk2_serial}")
 else:
-    print(f'Too many connected PPK2\'s: {ppk2s_connected}')
+    print(f"Too many connected PPK2's: {ppk2s_connected}")
     exit()
 
 ppk2_test = PPK2_API(ppk2_port, timeout=1, write_timeout=1, exclusive=True)
diff --git a/example_mp.py b/example_mp.py
index 183d5ad..523dcd9 100644
--- a/example_mp.py
+++ b/example_mp.py
@@ -10,11 +10,12 @@
 from ppk2_api.ppk2_api import PPK2_MP as PPK2_API
 
 ppk2s_connected = PPK2_API.list_devices()
-if(len(ppk2s_connected) == 1):
-    ppk2_port = ppk2s_connected[0]
-    print(f'Found PPK2 at {ppk2_port}')
+if len(ppk2s_connected) == 1:
+    ppk2_port = ppk2s_connected[0][0]
+    ppk2_serial = ppk2s_connected[0][1]
+    print(f"Found PPK2 at {ppk2_port} with serial number {ppk2_serial}")
 else:
-    print(f'Too many connected PPK2\'s: {ppk2s_connected}')
+    print(f"Too many connected PPK2's: {ppk2s_connected}")
     exit()
 
 ppk2_test = PPK2_API(ppk2_port, buffer_max_size_seconds=1, buffer_chunk_seconds=0.01, timeout=1, write_timeout=1, exclusive=True)
diff --git a/src/ppk2_api/ppk2_api.py b/src/ppk2_api/ppk2_api.py
index 58bab9c..4b39a69 100644
--- a/src/ppk2_api/ppk2_api.py
+++ b/src/ppk2_api/ppk2_api.py
@@ -98,6 +98,9 @@ def __init__(self, port: str, **kwargs):
     def __del__(self):
         """Destructor"""
         try:
+            # reset device
+            self._write_serial((PPK2_Command.RESET,))
+
             if self.ser:
                 self.ser.close()
         except Exception as e:
@@ -210,11 +213,20 @@ def _handle_raw_data(self, adc_value):
     @staticmethod
     def list_devices():
         import serial.tools.list_ports
+
         ports = serial.tools.list_ports.comports()
-        if os.name == 'nt':
-            devices = [port.device for port in ports if port.description.startswith("nRF Connect USB CDC ACM")]
+        if os.name == "nt":
+            devices = [
+                (port.device, port.serial_number[:8])
+                for port in ports
+                if port.description.startswith("nRF Connect USB CDC ACM") and port.location.endswith("1")
+            ]
         else:
-            devices = [port.device for port in ports if port.product == 'PPK2']
+            devices = [
+                (port.device, port.serial_number[:8])
+                for port in ports
+                if port.product == "PPK2" and port.location.endswith("1")
+            ]
         return devices
 
     def get_data(self):