Fix overrun error in multicast queue

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/trunk@2148 b32b6428-25c9-4566-ad07-03861ab6144f

libs/monitor/xaal/monitor/monitor.py

@@ -27,7 +27,7 @@ class Device:
         self.last_alive = int(time.time())
         self.next_alive = 0
         # Refresh rate 
-        self.refresh = 0
+        self.refresh = now() - REFRESH_RATE + random.randint(0,20)
         self.refresh_attributes = 0
         self.refresh_description = 0
         self.refresh_db = 0
@@ -35,7 +35,7 @@ class Device:
     def update_attributes(self, data):
         """ rude update attributes. Return true if updated"""
         self.refresh_attributes = now()
-        # really no the best comparaison, but we just need a flag
+        # really not the best comparaison, but we just need a flag
         if self.attributes == data:
             return False
         self.attributes.update(data)
@@ -199,7 +199,7 @@ class Monitor:
         self.engine.add_rx_handler(self.parse_msg)
         self.engine.add_timer(self.auto_wash, 10)
         self.engine.add_timer(self.send_isalive, 240)
-        self.engine.add_timer(self.refresh_devices, 5)
+        self.engine.add_timer(self.refresh_devices, 2)
 
     def parse_msg(self, msg):
         # do nothing for some msg