diff --git a/README.md b/README.md
index 9db7a4e..627aac8 100644
--- a/README.md
+++ b/README.md
@@ -103,7 +103,7 @@ Config is done in the HA integrations UI.
 
 ### Host
 
-The IP address of the main deco which you visit in the browser to see the web admin page. Example: `192.168.0.1`
+The IP address of the main deco which you visit in the browser to see the web admin page. Example: `http://192.168.0.1`. Some decos use https, so if you have trouble connection, try using `https` e.g. `https://192.168.0.1`.
 
 ### Login Credentials
 
diff --git a/custom_components/tplink_deco/__init__.py b/custom_components/tplink_deco/__init__.py
index 1627412..e489441 100644
--- a/custom_components/tplink_deco/__init__.py
+++ b/custom_components/tplink_deco/__init__.py
@@ -263,6 +263,10 @@ async def async_migrate_entry(hass, config_entry: ConfigEntry):
         new[CONF_DECO_PREFIX] = ""
         new[CONF_DECO_POSTFIX] = DEFAULT_DECO_POSTFIX
 
+    if config_entry.version == 5:
+        config_entry.version = 6
+        new[CONF_HOST] = f"http://{new[CONF_HOST]}"
+
     hass.config_entries.async_update_entry(config_entry, data=new)
 
     _LOGGER.info("Migration to version %s successful", config_entry.version)
diff --git a/custom_components/tplink_deco/api.py b/custom_components/tplink_deco/api.py
index a802ae8..beb79f5 100644
--- a/custom_components/tplink_deco/api.py
+++ b/custom_components/tplink_deco/api.py
@@ -172,7 +172,7 @@ async def _async_list_devices(self) -> dict:
         device_list_payload = {"operation": "read"}
         response_json = await self._async_post(
             context,
-            f"http://{self._host}/cgi-bin/luci/;stok={self._stok}/admin/device",
+            f"{self._host}/cgi-bin/luci/;stok={self._stok}/admin/device",
             params={"form": "device_list"},
             data=self._encode_payload(device_list_payload),
         )
@@ -207,7 +207,7 @@ async def async_reboot_decos(self, deco_macs) -> dict:
         }
         response_json = await self._async_post(
             context,
-            f"http://{self._host}/cgi-bin/luci/;stok={self._stok}/admin/device",
+            f"{self._host}/cgi-bin/luci/;stok={self._stok}/admin/device",
             params={"form": "system"},
             data=self._encode_payload(client_payload),
         )
@@ -227,7 +227,7 @@ async def _async_list_clients(self, deco_mac) -> dict:
         client_payload = {"operation": "read", "params": {"device_mac": deco_mac}}
         response_json = await self._async_post(
             context,
-            f"http://{self._host}/cgi-bin/luci/;stok={self._stok}/admin/client",
+            f"{self._host}/cgi-bin/luci/;stok={self._stok}/admin/client",
             params={"form": "client_list"},
             data=self._encode_payload(client_payload),
         )
@@ -263,7 +263,7 @@ async def _async_fetch_keys(self):
         context = "Fetch keys"
         response_json = await self._async_post(
             context,
-            f"http://{self._host}/cgi-bin/luci/;stok=/login",
+            f"{self._host}/cgi-bin/luci/;stok=/login",
             params={"form": "keys"},
             data=json.dumps({"operation": "read"}),
         )
@@ -288,7 +288,7 @@ async def _async_fetch_auth(self):
         context = "Fetch auth"
         response_json = await self._async_post(
             context,
-            f"http://{self._host}/cgi-bin/luci/;stok=/login",
+            f"{self._host}/cgi-bin/luci/;stok=/login",
             params={"form": "auth"},
             data=json.dumps({"operation": "read"}),
         )
@@ -356,7 +356,7 @@ async def _async_login(self):
         try:
             response_json = await self._async_post(
                 context,
-                f"http://{self._host}/cgi-bin/luci/;stok=/login",
+                f"{self._host}/cgi-bin/luci/;stok=/login",
                 params={"form": "login"},
                 data=self._encode_payload(login_payload),
             )
diff --git a/custom_components/tplink_deco/config_flow.py b/custom_components/tplink_deco/config_flow.py
index af69379..824c532 100644
--- a/custom_components/tplink_deco/config_flow.py
+++ b/custom_components/tplink_deco/config_flow.py
@@ -16,6 +16,7 @@
 from homeassistant.core import callback
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryAuthFailed
+from homeassistant.exceptions import ConfigEntryNotReady
 
 from .__init__ import async_create_and_refresh_coordinators
 from .const import CONF_CLIENT_POSTFIX
@@ -54,7 +55,9 @@ def _get_schema(data: dict[str:Any]):
     scan_interval = data.get(CONF_SCAN_INTERVAL, DEFAULT_SCAN_INTERVAL)
     schema.update(
         {
-            vol.Required(CONF_HOST, default=data.get(CONF_HOST, "10.0.0.1")): str,
+            vol.Required(
+                CONF_HOST, default=data.get(CONF_HOST, "http://192.168.0.1")
+            ): str,
             vol.Required(
                 CONF_SCAN_INTERVAL,
                 default=scan_interval,
@@ -126,17 +129,21 @@ async def _async_test_credentials(hass: HomeAssistant, data: dict[str:Any]):
     except TimeoutException:
         return {"base": "timeout_connect"}
     except ConfigEntryAuthFailed as err:
-        _LOGGER.warning("Error authenticating credentials: %s", err)
+        _LOGGER.error("Error authenticating credentials: %s", err)
         return {"base": "invalid_auth"}
+    except ConfigEntryNotReady as err:
+        _LOGGER.error("Error connection to host: %s", err)
+        return {"base": "invalid_host"}
     except Exception as err:
-        _LOGGER.warning("Error testing credentials: %s", err)
+        _LOGGER.error("Error testing credentials: %s", err)
+        raise err
         return {"base": "unknown"}
 
 
 class TplinkDecoFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
     """Config flow for tplink_deco."""
 
-    VERSION = 5
+    VERSION = 6
     CONNECTION_CLASS = config_entries.CONN_CLASS_CLOUD_POLL
     reauth_entry: ConfigEntry = None
 
diff --git a/custom_components/tplink_deco/strings.json b/custom_components/tplink_deco/strings.json
index 8fdac29..ebf2420 100644
--- a/custom_components/tplink_deco/strings.json
+++ b/custom_components/tplink_deco/strings.json
@@ -28,6 +28,7 @@
     },
     "error": {
       "invalid_auth": "[%key:common::config_flow::error::invalid_auth%]",
+      "invalid_host": "[%key:common::config_flow::error::invalid_host%]",
       "timeout_connect": "[%key:common::config_flow::error::timeout_connect%]",
       "unknown": "[%key:common::config_flow::error::unknown%]"
     }
@@ -57,6 +58,7 @@
     },
     "error": {
       "invalid_auth": "[%key:common::config_flow::error::invalid_auth%]",
+      "invalid_host": "[%key:common::config_flow::error::invalid_host%]",
       "timeout_connect": "[%key:common::config_flow::error::timeout_connect%]",
       "unknown": "[%key:common::config_flow::error::unknown%]"
     }
diff --git a/custom_components/tplink_deco/translations/en.json b/custom_components/tplink_deco/translations/en.json
index 97189a1..6a3ad51 100644
--- a/custom_components/tplink_deco/translations/en.json
+++ b/custom_components/tplink_deco/translations/en.json
@@ -31,6 +31,7 @@
     },
     "error": {
       "invalid_auth": "Invalid authentication",
+      "invalid_host": "Unable to connect to host.",
       "timeout_connect": "Timeout establishing connection",
       "unknown": "Unexpected error"
     }
@@ -57,6 +58,7 @@
     },
     "error": {
       "invalid_auth": "Invalid authentication",
+      "invalid_host": "Unable to connect to host.",
       "timeout_connect": "Timeout establishing connection",
       "unknown": "Unexpected error"
     }