diff --git a/changelog.txt b/changelog.txt
index 214e0479..be2520a1 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,5 +1,10 @@
-Version 0.22.3 (2022-01-16)
+Version 0.23.0 (2022-01-16)
 - Make ["DRY", "RAIN"] sensor a binary_sensor
+- Add converter to sensor value
+    - HmIP-SCTH230 CONCENTRATION to int
+    - Fix RSSI
+- raise connection_checker interval to 60s
+- Add sleep interval(120s) to wait with reconnect after successful connection check
 
 Version 0.22.2 (2022-01-15)
 - Rename hub extra_state_attributes to attributes
diff --git a/hahomematic/central_unit.py b/hahomematic/central_unit.py
index bee2d578..8784b091 100644
--- a/hahomematic/central_unit.py
+++ b/hahomematic/central_unit.py
@@ -416,13 +416,15 @@ async def is_connected(self) -> bool:
             self._available = True
         return True
 
-    async def reconnect(self) -> None:
+    async def reconnect(self, force_immediate: bool = False) -> None:
         """re-init all RPC clients."""
         if await self.is_connected():
             _LOGGER.warning(
                 "CentralUnit.reconnect: re-connect to central_unit %s",
                 self.instance_name,
             )
+            if not force_immediate:
+                await asyncio.sleep(config.RECONNECT_WAIT)
             for client in self._clients.values():
                 await client.proxy_re_init()
 
@@ -594,7 +596,7 @@ def stop(self) -> None:
         self._active = False
 
     async def _check_connection(self) -> None:
-        sleep_time = config.CONNECTION_CHECKER_INTERVAL
+        connection_checker_interval = config.CONNECTION_CHECKER_INTERVAL
         while self._active:
             _LOGGER.debug(
                 "ConnectionCecker.check_connection: Checking connection to server %s",
@@ -606,12 +608,12 @@ async def _check_connection(self) -> None:
                         "ConnectionCecker.check_connection: No connection to server %s",
                         self._central.instance_name,
                     )
-                    await asyncio.sleep(sleep_time)
+                    await asyncio.sleep(connection_checker_interval)
                     await self._central.reconnect()
-                await asyncio.sleep(sleep_time)
+                await asyncio.sleep(connection_checker_interval)
             except NoConnection as nex:
                 _LOGGER.exception("check_connection: no connection: %s", nex.args)
-                await asyncio.sleep(sleep_time)
+                await asyncio.sleep(connection_checker_interval)
                 continue
             except Exception:
                 _LOGGER.exception("check_connection: Exception")
diff --git a/hahomematic/config.py b/hahomematic/config.py
index ec594fdc..805f6425 100644
--- a/hahomematic/config.py
+++ b/hahomematic/config.py
@@ -5,6 +5,7 @@
 
 from hahomematic.const import DEFAULT_INIT_TIMEOUT, DEFAULT_TIMEOUT
 
-CONNECTION_CHECKER_INTERVAL = 30
+CONNECTION_CHECKER_INTERVAL = 60
+RECONNECT_WAIT = 120
 INIT_TIMEOUT = DEFAULT_INIT_TIMEOUT
 TIMEOUT = DEFAULT_TIMEOUT
diff --git a/hahomematic/platforms/sensor.py b/hahomematic/platforms/sensor.py
index b1a68077..5561a7de 100644
--- a/hahomematic/platforms/sensor.py
+++ b/hahomematic/platforms/sensor.py
@@ -42,4 +42,47 @@ def value(self) -> Any | None:
         """Return the value."""
         if self._value is not None and self._value_list is not None:
             return self._value_list[self._value]
+        if convert_func := self._get_converter_func():
+            return convert_func(self._value)
         return self._value
+
+    def _get_converter_func(self) -> Any:
+        """Return a converter based on sensor."""
+        if convert_func := CONVERTERS_BY_DEVICE_PARAM.get(
+            (self.device_type, self.parameter)
+        ):
+            return convert_func
+        if convert_func := CONVERTERS_BY_PARAM.get(self.parameter):
+            return convert_func
+
+
+def _convert_float_to_int(value: Any) -> int | None:
+    """Convert value to int."""
+    if value is not None and isinstance(value, float):
+        return int(value)
+    return value
+
+
+def _fix_rssi(value: Any) -> int | None:
+    """Fix rssi value."""
+    if value is None or not isinstance(value, int):
+        return None
+    if -120 <= value <= 0:
+        return value
+    if 0 < value <= 120:
+        return value * -1
+    if -256 <= value <= -146:
+        return (value * -1) - 256
+    if 146 <= value <= 256:
+        return value - 256
+    return None
+
+
+CONVERTERS_BY_DEVICE_PARAM: dict[tuple[str, str], Any] = {
+    ("HmIP-SCTH230", "CONCENTRATION"): _convert_float_to_int,
+}
+
+CONVERTERS_BY_PARAM: dict[str, Any] = {
+    "RSSI_PEER": _fix_rssi,
+    "RSSI_DEVICE": _fix_rssi,
+}
diff --git a/setup.py b/setup.py
index 5af670ce..7af2b2cd 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@ def readme():
     },
 PACKAGE_NAME = "hahomematic"
 HERE = os.path.abspath(os.path.dirname(__file__))
-VERSION = "0.22.3"
+VERSION = "0.23.0"
 
 PACKAGES = find_packages(exclude=["tests", "tests.*", "dist", "build"])