diff --git a/pybricks/iodevices.py b/pybricks/iodevices.py
index c10bbac..2134b11 100644
--- a/pybricks/iodevices.py
+++ b/pybricks/iodevices.py
@@ -12,64 +12,26 @@ class LUMPDevice():
         """
         pass
 
-    def read(self):
-        """Read latest values from the sensor.
+    def read(self, mode):
+        """Read values from a given mode.
+
+        Arguments:
+            mode (``int``): Device mode.
 
         Returns:
             ``tuple``: Values read from the sensor.
         """
         pass
 
-    def write(self, values):
+    def write(self, mode, values):
         """Write values to the sensor.
 
         Arguments:
+            mode (``int``): Device mode.
             data (``tuple``): Values to be written.
         """
         pass
 
-    def get_mode(self):
-        """Get the currently active mode or combi-mode.
-
-        Returns:
-            ``tuple``: Values read from the sensor.
-        """
-        pass
-
-    def set_mode(self, mode):
-        """Set the sensor to a given mode.
-
-        Arguments:
-            mode (``int``): Mode index.
-        """
-        pass
-
-    def set_combi_mode(self, todo1, todo2):
-        """Set the sensor to a given combi-mode.
-
-        TODO: Need to figure out how this works.
-
-        Arguments:
-            TODO (``tuple``): TODO.
-        """
-        pass
-
-    def format(self):
-        """Get the data type for the currently active mode.
-
-        Returns:
-            ``str``: Struct format specifier.
-        """
-        pass
-
-    def id(self):
-        """Get the unique type ID for this device.
-
-        Returns:
-            ``int``: Device ID.
-        """
-        pass
-
 
 class AnalogSensor():
     """Generic or custom analog sensor."""