diff --git a/pyhon/api.py b/pyhon/api.py
index 2903d7e..e83c100 100644
--- a/pyhon/api.py
+++ b/pyhon/api.py
@@ -70,7 +70,7 @@ class HonConnection:
             "applianceType": device.appliance_type,
             "code": device.appliance["code"],
             "applianceModelId": device.appliance_model_id,
-            "firmwareId": "41",
+            "firmwareId": device.appliance["eepromId"],
             "macAddress": device.mac_address,
             "fwVersion": device.appliance["fwVersion"],
             "os": const.OS,
diff --git a/pyhon/parameter.py b/pyhon/parameter.py
index 361d05d..2970fd9 100644
--- a/pyhon/parameter.py
+++ b/pyhon/parameter.py
@@ -30,7 +30,7 @@ class HonParameter:
 class HonParameterFixed(HonParameter):
     def __init__(self, key, attributes):
         super().__init__(key, attributes)
-        self._value = attributes["fixedValue"]
+        self._value = attributes.get("fixedValue", None)
 
     def __repr__(self):
         return f"{self.__class__} (<{self.key}> fixed)"