diff --git a/custom_components/solvis_control/__init__.py b/custom_components/solvis_control/__init__.py
index 3b929a4..41ac740 100644
--- a/custom_components/solvis_control/__init__.py
+++ b/custom_components/solvis_control/__init__.py
@@ -23,6 +23,8 @@
     CONF_OPTION_2,
     CONF_OPTION_3,
     CONF_OPTION_4,
+    POLL_RATE_SLOW,
+    POLL_RATE_DEFAULT,
 )
 from .coordinator import SolvisModbusCoordinator
 
@@ -69,6 +71,8 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
         entry.data.get(CONF_OPTION_2),
         entry.data.get(CONF_OPTION_3),
         entry.data.get(CONF_OPTION_4),
+        entry.data.get(POLL_RATE_DEFAULT),
+        entry.data.get(POLL_RATE_SLOW),
     )
     await coordinator.async_config_entry_first_refresh()
     hass.data[DOMAIN][entry.entry_id].setdefault(DATA_COORDINATOR, coordinator)
@@ -127,6 +131,13 @@ async def async_migrate_entry(hass, config_entry: ConfigEntry):
             if DEVICE_VERSION not in new_data:
                 new_data[DEVICE_VERSION] = "SC3"
             config_entry.minor_version = 3
+        if config_entry.minor_version < 4:
+            _LOGGER.info(f"Migrating from version {config_entry.version}")
+            if POLL_RATE_DEFAULT not in new_data:
+                new_data[POLL_RATE_DEFAULT] = 30
+            if POLL_RATE_SLOW not in new_data:
+                new_data[POLL_RATE_SLOW] = 300
+            config_entry.minor_version = 4
         hass.config_entries.async_update_entry(config_entry, data=new_data)
         _LOGGER.info(f"Migration to version {config_entry.version} successful")
         return True
diff --git a/custom_components/solvis_control/config_flow.py b/custom_components/solvis_control/config_flow.py
index d2dc8b9..1920a68 100644
--- a/custom_components/solvis_control/config_flow.py
+++ b/custom_components/solvis_control/config_flow.py
@@ -10,6 +10,7 @@
 from homeassistant.core import callback
 from homeassistant.data_entry_flow import FlowResult
 from homeassistant.helpers.typing import ConfigType
+from homeassistant.helpers import config_validation as cv
 
 from .const import (
     CONF_HOST,
@@ -21,11 +22,19 @@
     CONF_OPTION_3,
     CONF_OPTION_4,
     DEVICE_VERSION,
+    POLL_RATE_DEFAULT,
+    POLL_RATE_SLOW,
 )
 
 _LOGGER = logging.getLogger(__name__)
 
 
+def validate_poll_rates(data):
+    if data[POLL_RATE_SLOW] % data[POLL_RATE_DEFAULT] != 0:
+        raise vol.Invalid("POLL_RATE_SLOW must be a multiple of POLL_RATE_DEFAULT")
+    return data
+
+
 def get_host_schema_config(data: ConfigType) -> Schema:
     return vol.Schema(
         {
@@ -51,6 +60,12 @@ def get_solvis_devices(data: ConfigType) -> Schema:
     return vol.Schema(
         {
             vol.Required(DEVICE_VERSION, default="SC3"): vol.In({"SC2": 2, "SC3": 1}),
+            vol.Required(POLL_RATE_DEFAULT, default=30): vol.All(
+                vol.Coerce(int), vol.Range(min=30)
+            ),
+            vol.Required(POLL_RATE_SLOW, default=300): vol.All(
+                vol.Coerce(int), vol.Range(min=60)
+            ),
         }
     )
 
@@ -80,7 +95,15 @@ def get_solvis_devices_options(data: ConfigType) -> Schema:
             vol.Required(
                 DEVICE_VERSION, default=data.get(DEVICE_VERSION, "SC3")
             ): vol.In({"SC2": 2, "SC3": 1}),
-        }
+            vol.Required(POLL_RATE_DEFAULT, default=30): vol.All(
+                vol.Coerce(int), vol.Range(min=30)
+            ),
+            vol.Required(POLL_RATE_SLOW, default=300): vol.All(
+                vol.Coerce(int), vol.Range(min=60)
+            ),
+        },
+        extra=vol.ALLOW_EXTRA,
+        validator=validate_poll_rates,
     )
 
 
@@ -95,7 +118,7 @@ def get_host_schema_options(data: ConfigType) -> Schema:
 
 class SolvisConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
     VERSION = 1
-    MINOR_VERSION = 3
+    MINOR_VERSION = 4
 
     def __init__(self) -> None:
         """Init the ConfigFlow."""
@@ -108,21 +131,6 @@ async def async_step_user(self, user_input: ConfigType | None = None) -> FlowRes
         errors = {}
         if user_input is not None:
             self.data = user_input
-            # try:
-            #     self.client = ModbusClient.AsyncModbusTcpClient(
-            #         user_input[CONF_HOST], user_input[CONF_PORT]
-            #     )
-            #     await self.client.connect()
-            #     # Perform a simple read to check the connection
-            #     await self.client.read_holding_registers(2818, 1, 1)
-            # except (ConnectionException, ModbusException) as exc:
-            #     _LOGGER.error(f"Modbus connection failed: {exc}")
-            #     errors["base"] = "cannot_connect"
-            # else:
-            #     await self.client.close()
-            #     await self.async_set_unique_id(
-            #         self.data[CONF_HOST], raise_on_progress=False
-            #     )
             self._abort_if_unique_id_configured()
             return await self.async_step_device()
 
@@ -136,9 +144,12 @@ async def async_step_device(
         """Handle the device step."""
         errors = {}
         if user_input is not None:
-            self.data.update(user_input)
-            return await self.async_step_features()
-
+            try:
+                self.data.update(user_input)
+                return await self.async_step_features()
+            except vol.Invalid as exc:
+                errors["base"] = str(exc)
+                errors["device"] = exc.error_message
         return self.async_show_form(
             step_id="device",
             data_schema=get_solvis_devices(self.data),
@@ -167,7 +178,7 @@ def async_get_options_flow(
 
 class SolvisOptionsFlow(config_entries.OptionsFlow):
     VERSION = 1
-    MINOR_VERSION = 3
+    MINOR_VERSION = 4
 
     def __init__(self, config) -> None:
         """Init the ConfigFlow."""
@@ -181,18 +192,6 @@ async def async_step_init(self, user_input: ConfigType | None = None) -> FlowRes
         _LOGGER.debug(f"Options flow values_1: {str(self.data)}", DOMAIN)
         if user_input is not None:
             self.data.update(user_input)
-            # try:
-            #     self.client = ModbusClient.AsyncModbusTcpClient(
-            #         user_input[CONF_HOST], user_input[CONF_PORT]
-            #     )
-            #     await self.client.connect()
-            #     # Perform a simple read to check the connection
-            #     await self.client.read_holding_registers(2818, 1, 1)
-            # except (ConnectionException, ModbusException) as exc:
-            #     _LOGGER.error(f"Modbus connection failed: {exc}")
-            #     errors["base"] = "cannot_connect"
-            # else:
-            #     await self.client.close()
             return await self.async_step_device()
 
         return self.async_show_form(
@@ -208,9 +207,12 @@ async def async_step_device(
         errors = {}
         _LOGGER.debug(f"Options flow values_1: {str(self.data)}", DOMAIN)
         if user_input is not None:
-            self.data.update(user_input)
-            return await self.async_step_features()
-
+            try:
+                self.data.update(user_input)
+                return await self.async_step_features()
+            except vol.Invalid as exc:
+                errors["base"] = str(exc)
+                errors["device"] = exc
         return self.async_show_form(
             step_id="device",
             data_schema=get_solvis_devices(self.data),
diff --git a/custom_components/solvis_control/const.py b/custom_components/solvis_control/const.py
index 1b240c8..1f6095d 100644
--- a/custom_components/solvis_control/const.py
+++ b/custom_components/solvis_control/const.py
@@ -7,6 +7,8 @@
 CONF_PORT = "port"
 
 DEVICE_VERSION = "device_version"
+POLL_RATE_DEFAULT = "poll_rate_default"
+POLL_RATE_SLOW = "poll_rate_slow"
 
 # Option attributes to make certain values configurable
 CONF_OPTION_1 = "HKR2"  # HKR 2
@@ -53,6 +55,12 @@ class ModbusFieldConfig:
     # Supported Version
     # 0: SC2 & SC3, 1: SC3, 2: SC2
     supported_version: int = 0
+    # Poll rate
+    # False: default, True: slow
+    poll_rate: bool = False
+    # Internal variable to store the value of the last poll
+    # Don't change
+    poll_time: int = 0
 
 
 PORT = 502
@@ -268,6 +276,7 @@ class ModbusFieldConfig:
         multiplier=1,
         entity_category="diagnostic",
         absolute_value=True,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # Ionisationsstrom
         name="ionisation_voltage",
@@ -372,6 +381,7 @@ class ModbusFieldConfig:
         multiplier=1,
         options=("2", "3", "4", "5", "6", "7"),
         input_type=1,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR1 Warmwasser Vorrang
         name="hkr1_warmwasser_vorrang",
@@ -382,6 +392,7 @@ class ModbusFieldConfig:
         register=2,
         multiplier=1,
         input_type=3,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR1 Vorlaufart
         name="hkr1_vorlaufart",
@@ -392,6 +403,7 @@ class ModbusFieldConfig:
         register=2,
         multiplier=1,
         enabled_by_default=False,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR1 Fix Vorlauf Tag
         name="hkr1_fix_vorlauf_tag",
@@ -403,6 +415,7 @@ class ModbusFieldConfig:
         multiplier=1,
         input_type=2,
         range_data=(5, 75),
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR1 Fix Vorlauf Nacht
         name="hkr1_fix_vorlauf_nacht",
@@ -415,6 +428,7 @@ class ModbusFieldConfig:
         edit=True,
         input_type=2,
         range_data=(5, 75),
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR1 Heizkurve Tag Temp. 1
         name="hkr1_heizkurve_temp_tag_1",
@@ -427,6 +441,7 @@ class ModbusFieldConfig:
         edit=True,
         input_type=2,
         range_data=(5, 50),
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR1 Heizkurve Tag Temp. 2
         name="hkr1_heizkurve_temp_tag_2",
@@ -439,6 +454,7 @@ class ModbusFieldConfig:
         edit=True,
         input_type=2,
         range_data=(5, 30),
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR1 Heizkurve Tag Temp. 3
         name="hkr1_heizkurve_temp_tag_3",
@@ -451,6 +467,7 @@ class ModbusFieldConfig:
         edit=True,
         input_type=2,
         range_data=(5, 30),
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR1 Heizkurve Absenkung
         name="hkr1_heizkurve_temp_absenkung",
@@ -463,6 +480,7 @@ class ModbusFieldConfig:
         edit=True,
         input_type=2,
         range_data=(5, 30),
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR1 Heizkurve Steilheit
         name="hkr1_heizkurve_steilheit",
@@ -476,6 +494,7 @@ class ModbusFieldConfig:
         input_type=2,
         range_data=(0.2, 2.5),
         step_size=0.05,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # Raumtemperatur_HKR1
         name="raumtemperatur_hkr1",
@@ -497,6 +516,7 @@ class ModbusFieldConfig:
         options=("2", "3", "4", "5", "6", "7"),
         conf_option=1,
         input_type=1,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR2 Vorlaufart
         name="hkr2_vorlaufart",
@@ -508,6 +528,7 @@ class ModbusFieldConfig:
         multiplier=1,
         conf_option=1,
         enabled_by_default=False,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR2 Warmwasser Vorrang
         name="hkr2_warmwasser_vorrang",
@@ -532,6 +553,7 @@ class ModbusFieldConfig:
         input_type=2,
         range_data=(5, 75),
         conf_option=1,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR2 Fix Vorlauf Nacht
         name="hkr2_fix_vorlauf_nacht",
@@ -545,6 +567,7 @@ class ModbusFieldConfig:
         input_type=2,
         range_data=(5, 75),
         conf_option=1,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR2 Heizkurve Tag Temp. 1
         name="hkr2_heizkurve_temp_tag_1",
@@ -558,6 +581,7 @@ class ModbusFieldConfig:
         input_type=2,
         range_data=(5, 50),
         conf_option=1,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR2 Heizkurve Tag Temp. 2
         name="hkr2_heizkurve_temp_tag_2",
@@ -571,6 +595,7 @@ class ModbusFieldConfig:
         input_type=2,
         range_data=(5, 30),
         conf_option=1,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR2 Heizkurve Tag Temp. 3
         name="hkr2_heizkurve_temp_tag_3",
@@ -584,6 +609,7 @@ class ModbusFieldConfig:
         input_type=2,
         range_data=(5, 30),
         conf_option=1,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR2 Heizkurve Absenkung
         name="hkr2_heizkurve_temp_absenkung",
@@ -597,6 +623,7 @@ class ModbusFieldConfig:
         input_type=2,
         range_data=(5, 30),
         conf_option=1,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR2 Heizkurve Steilheit
         name="hkr2_heizkurve_steilheit",
@@ -611,6 +638,7 @@ class ModbusFieldConfig:
         range_data=(0.2, 2.5),
         conf_option=1,
         step_size=0.05,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # Raumtemperatur_HKR2
         name="raumtemperatur_hkr2",
@@ -633,6 +661,7 @@ class ModbusFieldConfig:
         options=("2", "3", "4", "5", "6", "7"),
         conf_option=2,
         input_type=1,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR3 Vorlaufart
         name="hkr3_vorlaufart",
@@ -644,6 +673,7 @@ class ModbusFieldConfig:
         multiplier=1,
         conf_option=2,
         enabled_by_default=False,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR3 Warmwasser Vorrang
         name="hkr3_warmwasser_vorrang",
@@ -655,6 +685,7 @@ class ModbusFieldConfig:
         multiplier=1,
         input_type=3,
         conf_option=2,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR3 Fix Vorlauf Tag
         name="hkr3_fix_vorlauf_tag",
@@ -668,6 +699,7 @@ class ModbusFieldConfig:
         range_data=(5, 75),
         conf_option=2,
         input_type=2,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR3 Fix Vorlauf Nacht
         name="hkr3_fix_vorlauf_nacht",
@@ -681,6 +713,7 @@ class ModbusFieldConfig:
         input_type=2,
         range_data=(5, 75),
         conf_option=2,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR3 Heizkurve Tag Temp. 1
         name="hkr3_heizkurve_temp_tag_1",
@@ -694,6 +727,7 @@ class ModbusFieldConfig:
         input_type=2,
         range_data=(5, 50),
         conf_option=2,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR3 Heizkurve Tag Temp. 2
         name="hkr3_heizkurve_temp_tag_2",
@@ -707,6 +741,7 @@ class ModbusFieldConfig:
         input_type=2,
         range_data=(5, 30),
         conf_option=2,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR3 Heizkurve Tag Temp. 3
         name="hkr3_heizkurve_temp_tag_3",
@@ -720,6 +755,7 @@ class ModbusFieldConfig:
         input_type=2,
         range_data=(5, 30),
         conf_option=2,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # HKR3 Heizkurve Absenkung
         name="hkr3_heizkurve_temp_absenkung",
@@ -747,6 +783,7 @@ class ModbusFieldConfig:
         range_data=(0.2, 2.5),
         conf_option=2,
         step_size=0.05,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # Raumtemperatur_HKR3
         name="raumtemperatur_hkr3",
@@ -779,6 +816,7 @@ class ModbusFieldConfig:
         multiplier=1,
         entity_category="diagnostic",
         data_processing=1,
+        poll_rate=True,
     ),
     ModbusFieldConfig(  # VersionNBG
         name="version_nbg",
@@ -789,6 +827,7 @@ class ModbusFieldConfig:
         multiplier=1,
         entity_category="diagnostic",
         data_processing=1,
+        poll_rate=True,
     ),
     ModbusFieldConfig(
         name="digin_error",
diff --git a/custom_components/solvis_control/coordinator.py b/custom_components/solvis_control/coordinator.py
index 70a0367..d4d136a 100644
--- a/custom_components/solvis_control/coordinator.py
+++ b/custom_components/solvis_control/coordinator.py
@@ -28,13 +28,15 @@ def __init__(
         option_hkr3: bool,
         option_solar: bool,
         option_heatpump: bool,
+        poll_rate_default: int,
+        poll_rate_slow: int,
     ):
         """Initializes the Solvis Modbus data coordinator."""
         super().__init__(
             hass,
             _LOGGER,
             name=DOMAIN,
-            update_interval=timedelta(seconds=30),
+            update_interval=timedelta(seconds=poll_rate_default),
         )
         self.host = host
         self.port = port
@@ -43,6 +45,8 @@ def __init__(
         self.option_solar = option_solar
         self.option_heatpump = option_heatpump
         self.supported_version = supported_version
+        self.poll_rate_default = poll_rate_default
+        self.poll_rate_slow = poll_rate_slow
 
         _LOGGER.debug("Creating Modbus client")
         self.modbus = ModbusClient.AsyncModbusTcpClient(host=host, port=port)
@@ -73,6 +77,17 @@ async def _async_update_data(self):
                 elif self.supported_version == 2 and register.supported_version == 1:
                     continue
 
+                # Calculation for passing entites, which are in SLOW_POLL_GOUP
+                if register.poll_rate:
+                    if register.poll_time > 0:
+                        register.poll_time -= self.poll_rate_default
+                        _LOGGER.debug(
+                            f"Skipping entity {register.name}/{register.address} due to slow poll rate"
+                        )
+                        continue
+                    if register.poll_time <= 0:
+                        register.poll_time = register.poll_rate_slow
+
                 entity_id = f"{DOMAIN}.{register.name}"
                 entity_entry = self.hass.data["entity_registry"].async_get(entity_id)
                 if entity_entry and entity_entry.disabled:
diff --git a/custom_components/solvis_control/number.py b/custom_components/solvis_control/number.py
index 96d7fe3..0138ea2 100644
--- a/custom_components/solvis_control/number.py
+++ b/custom_components/solvis_control/number.py
@@ -107,6 +107,7 @@ async def async_setup_entry(
                     register.address,
                     register.multiplier,
                     register.data_processing,
+                    register.poll_rate,
                 )
             )
 
@@ -131,6 +132,7 @@ def __init__(
         modbus_address: int = None,
         multiplier: float = 1,
         data_processing: int = 0,
+        poll_rate: bool = False,
     ):
         """Initialize the Solvis number entity."""
         super().__init__(coordinator)
@@ -158,6 +160,7 @@ def __init__(
             self.native_min_value = range_data[0]
             self.native_max_value = range_data[1]
         self.data_processing = data_processing
+        self.poll_rate = poll_rate
 
     @callback
     def _handle_coordinator_update(self) -> None:
diff --git a/custom_components/solvis_control/select.py b/custom_components/solvis_control/select.py
index 7a259ad..ed9cf4d 100644
--- a/custom_components/solvis_control/select.py
+++ b/custom_components/solvis_control/select.py
@@ -101,6 +101,7 @@ async def async_setup_entry(
                     register.options,  # These are the options for the select entity
                     register.address,
                     register.data_processing,
+                    register.poll_rate,
                 )
             )
 
@@ -120,6 +121,7 @@ def __init__(
         options: tuple = None,  # Renamed for clarity
         modbus_address: int = None,
         data_processing: int = None,
+        poll_rate: bool = False,
     ):
         """Initialize the Solvis select entity."""
         super().__init__(coordinator)
@@ -136,6 +138,7 @@ def __init__(
         self._attr_current_option = None
         self._attr_options = options  # Set the options for the select entity
         self.data_processing = data_processing
+        self.poll_rate = poll_rate
 
     @callback
     def _handle_coordinator_update(self) -> None:
diff --git a/custom_components/solvis_control/sensor.py b/custom_components/solvis_control/sensor.py
index 478af91..3a98fd8 100644
--- a/custom_components/solvis_control/sensor.py
+++ b/custom_components/solvis_control/sensor.py
@@ -103,6 +103,7 @@ async def async_setup_entry(
                     register.entity_category,
                     register.enabled_by_default,
                     register.data_processing,
+                    register.poll_rate,
                 )
             )
 
@@ -124,6 +125,7 @@ def __init__(
         entity_category: str | None = None,
         enabled_by_default: bool = True,
         data_processing: int = 0,
+        poll_rate: bool = False,
     ):
         """Initialize the Solvis sensor."""
         super().__init__(coordinator)
@@ -142,6 +144,7 @@ def __init__(
         self.unique_id = f"{re.sub('^[A-Za-z0-9_-]*$', '', name)}_{name}"
         self.translation_key = name
         self.data_processing = data_processing
+        self.poll_rate = poll_rate
 
     @callback
     def _handle_coordinator_update(self) -> None:
diff --git a/custom_components/solvis_control/switch.py b/custom_components/solvis_control/switch.py
index 379e7a5..05bc0ee 100644
--- a/custom_components/solvis_control/switch.py
+++ b/custom_components/solvis_control/switch.py
@@ -100,6 +100,7 @@ async def async_setup_entry(
                     register.enabled_by_default,
                     register.address,
                     register.data_processing,
+                    register.poll_rate,
                 )
             )
 
@@ -118,6 +119,7 @@ def __init__(
         enabled_by_default: bool = True,
         modbus_address: int = None,
         data_processing: int = 0,
+        poll_rate: bool = False,
     ):
         """Initialize the Solvis switch."""
         super().__init__(coordinator)
@@ -133,6 +135,7 @@ def __init__(
         self.translation_key = name
         self._attr_current_option = None
         self.data_processing = data_processing
+        self.poll_rate = poll_rate
 
     @callback
     def _handle_coordinator_update(self) -> None: