diff --git a/octoprint_mystromswitch/__init__.py b/octoprint_mystromswitch/__init__.py
index 8b10fa8..854655b 100644
--- a/octoprint_mystromswitch/__init__.py
+++ b/octoprint_mystromswitch/__init__.py
@@ -49,9 +49,10 @@ class MyStromSwitchPlugin(octoprint.plugin.SettingsPlugin,
         self._logger.info(self.ip)
         self._logger.info(self.intervall)
 
-        self._logger.info("Starting timer.")
-        self._timer = RepeatedTimer(self.intervall, self._timer_task)
-        self._timer.start()
+        if self.intervall >= 1 and self.ip is not None:
+            self._logger.info("Starting timer")
+            self._timer = RepeatedTimer(self.intervall, self._timer_task)
+            self._timer.start()
 
     def _timer_task(self):
         self._logger.debug("timer_task")
@@ -75,6 +76,10 @@ class MyStromSwitchPlugin(octoprint.plugin.SettingsPlugin,
     def on_shutdown(self):
         self._logger.info("Hello World!")
 
+    def on_settings_load(self):
+        self._logger.info("on_settings_load")
+        self.initialize()
+
     def on_settings_initialized(self):
         self._logger.info("on_settings_initialized")
         self.initialize()