diff --git a/MQTTClient.py b/MQTTClient.py
index f6a420a..4df009f 100644
--- a/MQTTClient.py
+++ b/MQTTClient.py
@@ -322,7 +322,7 @@ class MQTTClient:
                 if entity[namenorm]['unit_of_measurement'] == "\u00b0C":
                     entity[namenorm]['device_class'] = "temperature"
                 elif entity[namenorm]['unit_of_measurement'] == '%':
-                    entity[namenorm]['device_class'] = "power_factor"
+                    entity[namenorm]['state_class'] = "measurement"
                 elif entity[namenorm]['unit_of_measurement'] == 'kW':
                     entity[namenorm]['device_class'] = "power"
                 elif entity[namenorm]['unit_of_measurement'] == 'rpm':
diff --git a/MessageProcessor.py b/MessageProcessor.py
index a91957a..d091077 100644
--- a/MessageProcessor.py
+++ b/MessageProcessor.py
@@ -76,7 +76,7 @@ class MessageProcessor:
                 try:
                     msgvalue = self.determine_value(msg.packet_payload, msgname)
                 except Exception as e:
-                    raise MessageWarningException(argument=msg['payload'], message=f"Value of {hexmsg:<6} couldn't be determinate, skip Message {e}")
+                    raise MessageWarningException(argument=msg.packet_payload, message=f"Value of {hexmsg} couldn't be determinate, skip Message {e}")
                 self.protocolMessage(msg, msgname, msgvalue)
             else:
                 logger.debug(f"Message not Found in NASA repository: {hexmsg:<6} Type: {msg.packet_message_type} Payload: {msg.packet_payload}")
diff --git a/NASAPacket.py b/NASAPacket.py
index e9d150b..e42f771 100644
--- a/NASAPacket.py
+++ b/NASAPacket.py
@@ -259,9 +259,9 @@ class NASAPacket:
         elif message_type == 3:
             payload_size = len(msg_rest)
             if capacity != 1:
-                raise ValueError(message="Message with structure type must have capacity of 1.")
+                raise ValueError("Message with structure type must have capacity of 1.")
         else:
-            raise ValueError(message=f"Mssage type unknown: {message_type}")
+            raise ValueError(f"Mssage type unknown: {message_type}")
         
         payload = msg_rest[2:2 + payload_size]
         if len(payload) > 255:
diff --git a/README.md b/README.md
index 2720323..0cd48dd 100644
--- a/README.md
+++ b/README.md
@@ -60,6 +60,65 @@ EHS-Sentinel subscribes <hass_discovery_prefix>/status Topic and if it receive a
   `journalctl | grep ehsSentinel`
 
 
+## Venv Installation (recommendet)
+
+In general, it is recommended to work with a virtual environment (venvs) in python to be independent of other projects.
+Some Distributions like debian 12 dont allow to use system wide pip package installation, so you have to use venv.
+
+1. Just clone the repository
+    `git clone https://github.com/echoDaveD/EHS-Sentinel`
+
+2. Install python venv
+  `apt install python3.11-venv` <- modify your python verison here
+
+3. Create Python venv
+  `python3 -m venv EHS-Sentinel`
+
+4. change diractory
+   `cd EHS-Sentinel`
+
+5. activate venv
+  `source bin/activate`
+
+6. Install the requierments
+    `pip install -r requirements.txt`
+
+7. Copy the `data/config.yml` and provide your Configuration
+
+8. get path of venv python executable
+  `which python3` <- copy the output
+
+9. Change to ehs-sentinel.service file as followed:
+
+   `ExecStart = <path to python3> <Path of the script you want to run>` <- provide here to path to your folder where startEHSSentinel.py is
+
+   sample: `ExecStart = /root/EHS-Sentinel/bin/python3 /root/EHS-Sentinel/startEHSSentinel.py --configfile /root/EHS-Sentinel/config.yml`
+
+10. Change your `config.yml` to absolut paths:
+   `nasaRepositoryFile: /root/EHS-Sentinel/data/NasaRepository.yml`
+
+11. Deactivate venv
+  `dactivate`
+
+12. Copy the service File to your systemd folder:
+  `cp ehs-sentinel.service /etc/systemd/system`
+
+13. Enable the new service
+  `systemctl enable ehs-sentinel`
+
+14. Reload deamon
+  `systemctl daemon-reload`
+
+15. Start the Service
+  `systemctl start ehs-sentinel`
+
+16. check if anything is fine 
+  `systemctl status ehs-sentinel`
+
+17. If your want to check the journal logs
+  `journalctl | grep ehsSentinel`
+
+
 # Configuration
 
 
diff --git a/data/NasaRepository.yml b/data/NasaRepository.yml
index 1c173d5..5487676 100644
--- a/data/NasaRepository.yml
+++ b/data/NasaRepository.yml
@@ -787,7 +787,7 @@ ENUM_IN_WATERPUMP_PWM_VALUE:
   description: Water pump speed
   remarks: "unit\xC2\_%"
   signed: ''
-  type: ENUM
+  type: VAR
   unit: '%'
 ENUM_IN_WATER_VALVE_1_ON_OFF:
   address: '0x4103'
@@ -2887,10 +2887,10 @@ NASA_OUTDOOR_CONTROL_WATTMETER_ALL_UNIT_ACCUM:
   description: Outdoor unit cumulative power consumption. Sum of modules
   remarks: value is Wh, so do div 1000
   state_class: total_increasing
-  device_class: "measurement"
+  device_class: energy
   signed: 'false'
   type: LVAR
-  unit: kW
+  unit: kWh
 NASA_OUTDOOR_CONTROL_WATTMETER_TOTAL_SUM:
   address: '0x8415'
   arithmetic: ''
@@ -5796,6 +5796,7 @@ NASA_EHSSENTINEL_COP:
   arithmetic: ''
   description: Current COP
   remarks: Custom Measurment
+  state_class: measurement
   signed: 'true'
   type: VAR
   unit: ''
@@ -5804,6 +5805,7 @@ NASA_EHSSENTINEL_HEAT_OUTPUT:
   arithmetic: ''
   description: Current generated Heat Output
   remarks: Custom Measurment
+  state_class: measurement
   signed: 'true'
   type: VAR
   unit: "kW"
diff --git a/requirements.txt b/requirements.txt
index 74a9d47..5dbe9dd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,7 @@
 aiofiles>=24.1.0
+future>=1.0.0
+gmqtt>=0.7.0
+iso8601>=2.1.0
 pyserial>=3.5
 pyserial-asyncio>=0.6
-PyYAML>=6.0.2
-serial>=0.0.97
-gmqtt>=0.7.0
\ No newline at end of file
+PyYAML>=6.0.2
\ No newline at end of file