diff --git a/pytec/pytec/gui/model/thermostat.py b/pytec/pytec/gui/model/thermostat.py
index 821d558..a0fd111 100644
--- a/pytec/pytec/gui/model/thermostat.py
+++ b/pytec/pytec/gui/model/thermostat.py
@@ -3,9 +3,16 @@ from qasync import asyncSlot
 from pytec.gui.model.property import Property, PropertyMeta
 import asyncio
 import logging
+from enum import Enum
 from pytec.aioclient import AsyncioClient
 
 
+class ThermostatConnectionState(Enum):
+    DISCONNECTED = False
+    CONNECTING = "connecting"
+    CONNECTED = True
+
+
 class Thermostat(QObject, metaclass=PropertyMeta):
     hw_rev = Property(dict)
     fan = Property(dict)