diff --git a/homeassistant/components/homematic/climate.py b/homeassistant/components/homematic/climate.py
index 6e16e16ba99..28943774b6c 100644
--- a/homeassistant/components/homematic/climate.py
+++ b/homeassistant/components/homematic/climate.py
@@ -63,6 +63,11 @@ class HMThermostat(HMDevice, ClimateEntity):
         | ClimateEntityFeature.TURN_ON
     )
     _attr_temperature_unit = UnitOfTemperature.CELSIUS
+    _attr_min_temp = 4.5
+    _attr_max_temp = 30.5
+    _attr_target_temperature_step = 0.5
+
+    _state: str
 
     @property
     def hvac_mode(self) -> HVACMode:
@@ -93,7 +98,7 @@ class HMThermostat(HMDevice, ClimateEntity):
         return [HVACMode.HEAT, HVACMode.OFF]
 
     @property
-    def preset_mode(self):
+    def preset_mode(self) -> str:
         """Return the current preset mode, e.g., home, away, temp."""
         if self._data.get("BOOST_MODE", False):
             return "boost"
@@ -110,7 +115,7 @@ class HMThermostat(HMDevice, ClimateEntity):
         return mode
 
     @property
-    def preset_modes(self):
+    def preset_modes(self) -> list[str]:
         """Return a list of available preset modes."""
         return [
             HM_PRESET_MAP[mode]
@@ -119,7 +124,7 @@ class HMThermostat(HMDevice, ClimateEntity):
         ]
 
     @property
-    def current_humidity(self):
+    def current_humidity(self) -> float | None:
         """Return the current humidity."""
         for node in HM_HUMI_MAP:
             if node in self._data:
@@ -127,7 +132,7 @@ class HMThermostat(HMDevice, ClimateEntity):
         return None
 
     @property
-    def current_temperature(self):
+    def current_temperature(self) -> float | None:
         """Return the current temperature."""
         for node in HM_TEMP_MAP:
             if node in self._data:
@@ -135,7 +140,7 @@ class HMThermostat(HMDevice, ClimateEntity):
         return None
 
     @property
-    def target_temperature(self):
+    def target_temperature(self) -> float | None:
         """Return the target temperature."""
         return self._data.get(self._state)
 
@@ -164,21 +169,6 @@ class HMThermostat(HMDevice, ClimateEntity):
         elif preset_mode == PRESET_ECO:
             self._hmdevice.MODE = self._hmdevice.LOWERING_MODE
 
-    @property
-    def min_temp(self):
-        """Return the minimum temperature."""
-        return 4.5
-
-    @property
-    def max_temp(self):
-        """Return the maximum temperature."""
-        return 30.5
-
-    @property
-    def target_temperature_step(self):
-        """Return the supported step of target temperature."""
-        return 0.5
-
     @property
     def _hm_control_mode(self):
         """Return Control mode."""
diff --git a/homeassistant/components/homematic/const.py b/homeassistant/components/homematic/const.py
index 91ef2e90242..484ab5ada2a 100644
--- a/homeassistant/components/homematic/const.py
+++ b/homeassistant/components/homematic/const.py
@@ -215,31 +215,31 @@ HM_IGNORE_DISCOVERY_NODE_EXCEPTIONS = {
     ]
 }
 
-HM_ATTRIBUTE_SUPPORT = {
-    "LOWBAT": ["battery", {0: "High", 1: "Low"}],
-    "LOW_BAT": ["battery", {0: "High", 1: "Low"}],
-    "ERROR": ["error", {0: "No"}],
-    "ERROR_SABOTAGE": ["sabotage", {0: "No", 1: "Yes"}],
-    "SABOTAGE": ["sabotage", {0: "No", 1: "Yes"}],
-    "RSSI_PEER": ["rssi_peer", {}],
-    "RSSI_DEVICE": ["rssi_device", {}],
-    "VALVE_STATE": ["valve", {}],
-    "LEVEL": ["level", {}],
-    "BATTERY_STATE": ["battery", {}],
-    "CONTROL_MODE": [
+HM_ATTRIBUTE_SUPPORT: dict[str, tuple[str, dict[int, str]]] = {
+    "LOWBAT": ("battery", {0: "High", 1: "Low"}),
+    "LOW_BAT": ("battery", {0: "High", 1: "Low"}),
+    "ERROR": ("error", {0: "No"}),
+    "ERROR_SABOTAGE": ("sabotage", {0: "No", 1: "Yes"}),
+    "SABOTAGE": ("sabotage", {0: "No", 1: "Yes"}),
+    "RSSI_PEER": ("rssi_peer", {}),
+    "RSSI_DEVICE": ("rssi_device", {}),
+    "VALVE_STATE": ("valve", {}),
+    "LEVEL": ("level", {}),
+    "BATTERY_STATE": ("battery", {}),
+    "CONTROL_MODE": (
         "mode",
         {0: "Auto", 1: "Manual", 2: "Away", 3: "Boost", 4: "Comfort", 5: "Lowering"},
-    ],
-    "POWER": ["power", {}],
-    "CURRENT": ["current", {}],
-    "VOLTAGE": ["voltage", {}],
-    "OPERATING_VOLTAGE": ["voltage", {}],
-    "WORKING": ["working", {0: "No", 1: "Yes"}],
-    "STATE_UNCERTAIN": ["state_uncertain", {}],
-    "SENDERID": ["last_senderid", {}],
-    "SENDERADDRESS": ["last_senderaddress", {}],
-    "ERROR_ALARM_TEST": ["error_alarm_test", {0: "No", 1: "Yes"}],
-    "ERROR_SMOKE_CHAMBER": ["error_smoke_chamber", {0: "No", 1: "Yes"}],
+    ),
+    "POWER": ("power", {}),
+    "CURRENT": ("current", {}),
+    "VOLTAGE": ("voltage", {}),
+    "OPERATING_VOLTAGE": ("voltage", {}),
+    "WORKING": ("working", {0: "No", 1: "Yes"}),
+    "STATE_UNCERTAIN": ("state_uncertain", {}),
+    "SENDERID": ("last_senderid", {}),
+    "SENDERADDRESS": ("last_senderaddress", {}),
+    "ERROR_ALARM_TEST": ("error_alarm_test", {0: "No", 1: "Yes"}),
+    "ERROR_SMOKE_CHAMBER": ("error_smoke_chamber", {0: "No", 1: "Yes"}),
 }
 
 HM_PRESS_EVENTS = [
diff --git a/homeassistant/components/homematic/entity.py b/homeassistant/components/homematic/entity.py
index bf029b2806d..3b5d2ebb509 100644
--- a/homeassistant/components/homematic/entity.py
+++ b/homeassistant/components/homematic/entity.py
@@ -5,6 +5,7 @@ from __future__ import annotations
 from abc import abstractmethod
 from datetime import timedelta
 import logging
+from typing import Any
 
 from pyhomematic import HMConnection
 from pyhomematic.devicetypes.generic import HMGeneric
@@ -50,7 +51,7 @@ class HMDevice(Entity):
         self._channel = config.get(ATTR_CHANNEL)
         self._state = config.get(ATTR_PARAM)
         self._unique_id = config.get(ATTR_UNIQUE_ID)
-        self._data: dict[str, str] = {}
+        self._data: dict[str, Any] = {}
         self._connected = False
         self._available = False
         self._channel_map: dict[str, str] = {}