diff --git a/pyhon/appliance.py b/pyhon/appliance.py
index 00e9716..d54df40 100644
--- a/pyhon/appliance.py
+++ b/pyhon/appliance.py
@@ -5,7 +5,7 @@ from typing import TYPE_CHECKING
 
 from pyhon import helper
 from pyhon.commands import HonCommand
-from pyhon.parameter import HonParameterFixed
+from pyhon.parameter.fixed import HonParameterFixed
 
 if TYPE_CHECKING:
     from pyhon import HonAPI
diff --git a/pyhon/commands.py b/pyhon/commands.py
index c7c7537..03f70d0 100644
--- a/pyhon/commands.py
+++ b/pyhon/commands.py
@@ -1,12 +1,10 @@
 from typing import Optional, Dict, Any, List, TYPE_CHECKING
 
-from pyhon.parameter import (
-    HonParameterFixed,
-    HonParameterEnum,
-    HonParameterRange,
-    HonParameterProgram,
-    HonParameter,
-)
+from pyhon.parameter.base import HonParameter
+from pyhon.parameter.enum import HonParameterEnum
+from pyhon.parameter.fixed import HonParameterFixed
+from pyhon.parameter.program import HonParameterProgram
+from pyhon.parameter.range import HonParameterRange
 
 if TYPE_CHECKING:
     from pyhon import HonAPI
diff --git a/pyhon/parameter.py b/pyhon/parameter.py
deleted file mode 100644
index e5fba67..0000000
--- a/pyhon/parameter.py
+++ /dev/null
@@ -1,150 +0,0 @@
-from typing import Dict, Any, List, TYPE_CHECKING
-
-if TYPE_CHECKING:
-    from pyhon.commands import HonCommand
-
-
-def str_to_float(string: str | float) -> float:
-    try:
-        return int(string)
-    except ValueError:
-        return float(str(string).replace(",", "."))
-
-
-class HonParameter:
-    def __init__(self, key: str, attributes: Dict[str, Any]) -> None:
-        self._key = key
-        self._category: str = attributes.get("category", "")
-        self._typology: str = attributes.get("typology", "")
-        self._mandatory: int = attributes.get("mandatory", 0)
-        self._value: str | float = ""
-
-    @property
-    def key(self) -> str:
-        return self._key
-
-    @property
-    def value(self) -> str | float:
-        return self._value if self._value is not None else "0"
-
-    @property
-    def category(self) -> str:
-        return self._category
-
-    @property
-    def typology(self) -> str:
-        return self._typology
-
-    @property
-    def mandatory(self) -> int:
-        return self._mandatory
-
-
-class HonParameterFixed(HonParameter):
-    def __init__(self, key: str, attributes: Dict[str, Any]) -> None:
-        super().__init__(key, attributes)
-        self._value = attributes.get("fixedValue", None)
-
-    def __repr__(self) -> str:
-        return f"{self.__class__} (<{self.key}> fixed)"
-
-    @property
-    def value(self) -> str | float:
-        return self._value if self._value is not None else "0"
-
-    @value.setter
-    def value(self, value):
-        if not value == self._value:
-            raise ValueError("Can't change fixed value")
-
-
-class HonParameterRange(HonParameter):
-    def __init__(self, key: str, attributes: Dict[str, Any]) -> None:
-        super().__init__(key, attributes)
-        self._min: float = str_to_float(attributes["minimumValue"])
-        self._max: float = str_to_float(attributes["maximumValue"])
-        self._step: float = str_to_float(attributes["incrementValue"])
-        self._default: float = str_to_float(attributes.get("defaultValue", self._min))
-        self._value: float = self._default
-
-    def __repr__(self):
-        return f"{self.__class__} (<{self.key}> [{self._min} - {self._max}])"
-
-    @property
-    def min(self) -> float:
-        return self._min
-
-    @property
-    def max(self) -> float:
-        return self._max
-
-    @property
-    def step(self) -> float:
-        return self._step
-
-    @property
-    def value(self) -> float:
-        return self._value if self._value is not None else self._min
-
-    @value.setter
-    def value(self, value: float) -> None:
-        value = str_to_float(value)
-        if self._min <= value <= self._max and not value % self._step:
-            self._value = value
-        else:
-            raise ValueError(
-                f"Allowed: min {self._min} max {self._max} step {self._step}"
-            )
-
-
-class HonParameterEnum(HonParameter):
-    def __init__(self, key: str, attributes: Dict[str, Any]) -> None:
-        super().__init__(key, attributes)
-        self._default = attributes.get("defaultValue")
-        self._value = self._default or "0"
-        self._values: List[str] = attributes.get("enumValues", [])
-
-    def __repr__(self) -> str:
-        return f"{self.__class__} (<{self.key}> {self.values})"
-
-    @property
-    def values(self) -> List[str]:
-        return [str(value) for value in self._values]
-
-    @property
-    def value(self) -> str | float:
-        return self._value if self._value is not None else self.values[0]
-
-    @value.setter
-    def value(self, value: str) -> None:
-        if value in self.values:
-            self._value = value
-        else:
-            raise ValueError(f"Allowed values {self._value}")
-
-
-class HonParameterProgram(HonParameterEnum):
-    _FILTER = ["iot_recipe", "iot_guided"]
-
-    def __init__(self, key: str, command: "HonCommand") -> None:
-        super().__init__(key, {})
-        self._command = command
-        self._value: str = command.program
-        self._values: List[str] = list(command.programs)
-        self._typology: str = "enum"
-
-    @property
-    def value(self) -> str | float:
-        return self._value
-
-    @value.setter
-    def value(self, value: str) -> None:
-        if value in self.values:
-            self._command.program = value
-        else:
-            raise ValueError(f"Allowed values {self._values}")
-
-    @property
-    def values(self) -> List[str]:
-        values = [v for v in self._values if all(f not in v for f in self._FILTER)]
-        return sorted(values)
diff --git a/pyhon/parameter/__init__.py b/pyhon/parameter/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/pyhon/parameter/base.py b/pyhon/parameter/base.py
new file mode 100644
index 0000000..c2c818a
--- /dev/null
+++ b/pyhon/parameter/base.py
@@ -0,0 +1,30 @@
+from typing import Dict, Any
+
+
+class HonParameter:
+    def __init__(self, key: str, attributes: Dict[str, Any]) -> None:
+        self._key = key
+        self._category: str = attributes.get("category", "")
+        self._typology: str = attributes.get("typology", "")
+        self._mandatory: int = attributes.get("mandatory", 0)
+        self._value: str | float = ""
+
+    @property
+    def key(self) -> str:
+        return self._key
+
+    @property
+    def value(self) -> str | float:
+        return self._value if self._value is not None else "0"
+
+    @property
+    def category(self) -> str:
+        return self._category
+
+    @property
+    def typology(self) -> str:
+        return self._typology
+
+    @property
+    def mandatory(self) -> int:
+        return self._mandatory
diff --git a/pyhon/parameter/enum.py b/pyhon/parameter/enum.py
new file mode 100644
index 0000000..c5afcda
--- /dev/null
+++ b/pyhon/parameter/enum.py
@@ -0,0 +1,29 @@
+from typing import Dict, Any, List
+
+from pyhon.parameter.base import HonParameter
+
+
+class HonParameterEnum(HonParameter):
+    def __init__(self, key: str, attributes: Dict[str, Any]) -> None:
+        super().__init__(key, attributes)
+        self._default = attributes.get("defaultValue")
+        self._value = self._default or "0"
+        self._values: List[str] = attributes.get("enumValues", [])
+
+    def __repr__(self) -> str:
+        return f"{self.__class__} (<{self.key}> {self.values})"
+
+    @property
+    def values(self) -> List[str]:
+        return [str(value) for value in self._values]
+
+    @property
+    def value(self) -> str | float:
+        return self._value if self._value is not None else self.values[0]
+
+    @value.setter
+    def value(self, value: str) -> None:
+        if value in self.values:
+            self._value = value
+        else:
+            raise ValueError(f"Allowed values {self._value}")
diff --git a/pyhon/parameter/fixed.py b/pyhon/parameter/fixed.py
new file mode 100644
index 0000000..c3f60ec
--- /dev/null
+++ b/pyhon/parameter/fixed.py
@@ -0,0 +1,21 @@
+from typing import Dict, Any
+
+from pyhon.parameter.base import HonParameter
+
+
+class HonParameterFixed(HonParameter):
+    def __init__(self, key: str, attributes: Dict[str, Any]) -> None:
+        super().__init__(key, attributes)
+        self._value = attributes.get("fixedValue", None)
+
+    def __repr__(self) -> str:
+        return f"{self.__class__} (<{self.key}> fixed)"
+
+    @property
+    def value(self) -> str | float:
+        return self._value if self._value is not None else "0"
+
+    @value.setter
+    def value(self, value):
+        if not value == self._value:
+            raise ValueError("Can't change fixed value")
diff --git a/pyhon/parameter/program.py b/pyhon/parameter/program.py
new file mode 100644
index 0000000..a41603c
--- /dev/null
+++ b/pyhon/parameter/program.py
@@ -0,0 +1,33 @@
+from typing import List, TYPE_CHECKING
+
+from pyhon.parameter.enum import HonParameterEnum
+
+if TYPE_CHECKING:
+    from pyhon.commands import HonCommand
+
+
+class HonParameterProgram(HonParameterEnum):
+    _FILTER = ["iot_recipe", "iot_guided"]
+
+    def __init__(self, key: str, command: "HonCommand") -> None:
+        super().__init__(key, {})
+        self._command = command
+        self._value: str = command.program
+        self._values: List[str] = list(command.programs)
+        self._typology: str = "enum"
+
+    @property
+    def value(self) -> str | float:
+        return self._value
+
+    @value.setter
+    def value(self, value: str) -> None:
+        if value in self.values:
+            self._command.program = value
+        else:
+            raise ValueError(f"Allowed values {self._values}")
+
+    @property
+    def values(self) -> List[str]:
+        values = [v for v in self._values if all(f not in v for f in self._FILTER)]
+        return sorted(values)
diff --git a/pyhon/parameter/range.py b/pyhon/parameter/range.py
new file mode 100644
index 0000000..d0d26d9
--- /dev/null
+++ b/pyhon/parameter/range.py
@@ -0,0 +1,49 @@
+from typing import Dict, Any
+
+from pyhon.parameter.base import HonParameter
+
+
+def str_to_float(string: str | float) -> float:
+    try:
+        return int(string)
+    except ValueError:
+        return float(str(string).replace(",", "."))
+
+
+class HonParameterRange(HonParameter):
+    def __init__(self, key: str, attributes: Dict[str, Any]) -> None:
+        super().__init__(key, attributes)
+        self._min: float = str_to_float(attributes["minimumValue"])
+        self._max: float = str_to_float(attributes["maximumValue"])
+        self._step: float = str_to_float(attributes["incrementValue"])
+        self._default: float = str_to_float(attributes.get("defaultValue", self._min))
+        self._value: float = self._default
+
+    def __repr__(self):
+        return f"{self.__class__} (<{self.key}> [{self._min} - {self._max}])"
+
+    @property
+    def min(self) -> float:
+        return self._min
+
+    @property
+    def max(self) -> float:
+        return self._max
+
+    @property
+    def step(self) -> float:
+        return self._step
+
+    @property
+    def value(self) -> float:
+        return self._value if self._value is not None else self._min
+
+    @value.setter
+    def value(self, value: float) -> None:
+        value = str_to_float(value)
+        if self._min <= value <= self._max and not value % self._step:
+            self._value = value
+        else:
+            raise ValueError(
+                f"Allowed: min {self._min} max {self._max} step {self._step}"
+            )