only tag missing if missing for more than 24 hours

zigate/core.py

@@ -494,12 +494,15 @@ def _tag_missing(self, addr):
         '''
         tag a device as missing
         '''
+        last_24h = datetime.datetime.now()-datetime.timedelta(hours=24)
+        last_24h = last_24h.strftime('%Y-%m-%d %H:%M:%S')
         if addr in self._devices:
-            self._devices[addr].missing = True
-            LOGGER.warning('The device {} is missing'.format(addr))
-            dispatch_signal(ZIGATE_DEVICE_UPDATED,
-                            self, **{'zigate': self,
-                                     'device': self._devices[addr]})
+            if self._devices[addr].last_seen and self._devices[addr].last_seen < last_24h:
+                self._devices[addr].missing = True
+                LOGGER.warning('The device {} is missing'.format(addr))
+                dispatch_signal(ZIGATE_DEVICE_UPDATED,
+                                self, **{'zigate': self,
+                                         'device': self._devices[addr]})
 
     def get_missing(self):
         '''
@@ -1504,6 +1507,10 @@ def rssi(self):
     def rssi(self, value):
         self.info['rssi'] = value
 
+    @property
+    def last_seen(self):
+        return self.info.get('last_seen')
+
     @property
     def battery_percent(self):
         percent = self.get_property_value('battery_percent')