sispm improvements

powerplug.py

             try:
                 out_txt = subprocess.check_output(["sudo", "sispmctl", "-o" if state == True else "-f", output]).decode('UTF-8')
             except subprocess.CalledProcessError as grepexc:                                                                                                   
-                logger.error("sispm error code %d", grepexc.returncode)
+                logger.error("sispm error code %d while changing state of channel %s", grepexc.returncode, output)
             else:
                 logger.info('sispmctl channel %s changed to %s', output, state)
                 self.publish_states()
             self.set_out_state(output, not self.__state__[int(output) - 1])
 
     def get_out_states(self):
-        try:
-            out_txt = subprocess.check_output(["sudo", "sispmctl", "-g", "all"])
-        except subprocess.CalledProcessError as grepexc:
-            logger.error("sispm error code %d", grepexc.returncode)
-        else:
-            rv = []
-            for i in range(1, 5):
-                rv.append(out_txt.decode("UTF-8").split("\n")[i].split("\t")[1] == "on")
-            return rv
+        i = 0
+        while i < 10:	# number of tries
+            try:
+                out_txt = subprocess.check_output(["sudo", "sispmctl", "-g", "all"])
+            except subprocess.CalledProcessError as grepexc:
+                logger.error("sispm error code %d while getting states", grepexc.returncode)
+            else:
+                rv = []
+                for i in range(1, 5):
+                    rv.append(out_txt.decode("UTF-8").split("\n")[i].split("\t")[1] == "on")
+                return rv
+        logger.warning("Could not get state of powerplugs")
+        return self.__state__
 
     def publish_states(self):
         self.__state__ = self.get_out_states()
 
     def send_state(self, output):
         topic = config.MQTT_TOPIC + "/status/" + str(output)
-        logger.info("Sending Powerplug status information of plug %s to mqtt %s = %s", str(output), topic, str(self.__state__[output - 1]))
+        logger.debug("Sending Powerplug status information of plug %s to mqtt %s = %s", str(output), topic, str(self.__state__[output - 1]))
         try:
             self.__mqtt_client__.send(topic, "true" if self.__state__[output - 1] else "false")
         except (socket.timeout, OSError) as e:
-            logger.warning("Erro while sending state information information")
+            logger.warning("Error while sending state information via mqtt")
 
 
 class mqtt_powerplug(mqtt.mqtt_client):