Improve code sample

README.md

@@ -48,13 +48,14 @@ The following script can be used as a quickstart.
 
 ```python
 import asyncio
-from sagemcom_api.enums import EncryptionMethod
 from sagemcom_api.client import SagemcomClient
+from sagemcom_api.enums import EncryptionMethod
+from sagemcom_api.exceptions import NonWritableParameterException
 
 HOST = ""
 USERNAME = ""
 PASSWORD = ""
-ENCRYPTION_METHOD = EncryptionMethod.MD5 # or EncryptionMethod.SHA512
+ENCRYPTION_METHOD = EncryptionMethod.SHA512 # or EncryptionMethod.MD5
 
 async def main() -> None:
     async with SagemcomClient(HOST, USERNAME, PASSWORD, ENCRYPTION_METHOD) as client:
@@ -79,8 +80,13 @@ async def main() -> None:
         custom_command_output = await client.get_value_by_xpath("Device/UserInterface/AdvancedMode")
         print(custom_command_output)
 
-        # Set value via XPath notation
-        custom_command_output = await client.set_value_by_xpath("Device/UserInterface/AdvancedMode", "true")
+        # Set value via XPath notation and catch specific errors
+        try:
+            custom_command_output = await client.set_value_by_xpath("Device/UserInterface/AdvancedMode", "true")
+        except NonWritableParameterException as exception:  # pylint: disable=broad-except
+            print("Not allowed to set AdvancedMode parameter on your device.")
+            return
+
         print(custom_command_output)
 
 asyncio.run(main())