Fix events so they work with multiple devices (#22477)

homeassistant/components/axis/binary_sensor.py

@@ -24,8 +24,8 @@ async def async_setup_entry(hass, config_entry, async_add_entities):
         """Add binary sensor from Axis device."""
         async_add_entities([AxisBinarySensor(event, device)], True)
 
-    device.listeners.append(
-        async_dispatcher_connect(hass, 'axis_add_sensor', async_add_sensor))
+    device.listeners.append(async_dispatcher_connect(
+        hass, device.event_new_sensor, async_add_sensor))
 
 
 class AxisBinarySensor(BinarySensorDevice):

homeassistant/components/axis/device.py

@@ -99,11 +99,16 @@ class AxisNetworkDevice:
 
         return True
 
+    @property
+    def event_new_sensor(self):
+        """Device specific event to signal new sensor available."""
+        return 'axis_add_sensor_{}'.format(self.serial)
+
     @callback
     def async_signal_callback(self, action, event):
         """Call to configure events when initialized on event stream."""
         if action == 'add':
-            async_dispatcher_send(self.hass, 'axis_add_sensor', event)
+            async_dispatcher_send(self.hass, self.event_new_sensor, event)
 
     @callback
     def shutdown(self, event):