Take into account the notify_only_if_changed parameter

platypush/plugins/hid/__init__.py

@@ -142,6 +142,7 @@ class HidPlugin(RunnablePlugin):
         path = dev_def['path']
         data_size = rule['data_size']
         poll_seconds = rule['poll_seconds']
+        notify_only_if_changed = rule['notify_only_if_changed']
         last_data = None
         self.logger.info(f'Starting monitor for device {path}')
 
@@ -162,7 +163,7 @@ class HidPlugin(RunnablePlugin):
                 wait()
                 continue
 
-            if len(data) and data != last_data:
+            if not notify_only_if_changed or data != last_data:
                 data_dump = ''.join(f'{x:02x}' for x in data)
                 get_bus().post(HidDeviceDataEvent(data=data_dump, **dev_def))
                 last_data = data

platypush/schemas/hid.py

@@ -68,10 +68,10 @@ class HidMonitoredDeviceSchema(HidDeviceSchema):
     )
 
     poll_seconds = fields.Float(
-        missing=0.1,
+        missing=0,
         metadata={
-            'description': 'How often we should check this device for new data '
-            '(default: 0.1 seconds)'
+            'description': 'How often we should wait before data reads '
+            '(default: no wait)'
         },
     )