add support for 88005 light

Author: chrisruk

buildhat/__init__.py

@@ -5,6 +5,7 @@
 from .colordistance import ColorDistanceSensor
 from .matrix import Matrix
 from .wedo import TiltSensor, MotionSensor
+from .light import Light
 from .hat import Hat
 from .serinterface import BuildHAT
 from .exc import *

buildhat/devices.py

@@ -11,6 +11,7 @@ class Device:
     _instance = None
     _started = 0
     _device_names = {  2: "PassiveMotor",
+                       8: "Light",
                       34: "TiltSensor",
                       35: "MotionSensor",
                       37: "ColorDistanceSensor",

buildhat/light.py

@@ -0,0 +1,15 @@
+from .devices import Device
+from .exc import DeviceInvalid
+
+class Light(Device):
+    """Light
+
+    Use on()/off() functions to turn lights on/off
+
+    :param port: Port of device
+    :raises DeviceInvalid: Occurs if there is no light attached to port
+    """
+    def __init__(self, port):
+        super().__init__(port)
+        if self.typeid != 8:
+            raise DeviceInvalid('There is not a light connected to port %s (Found %s)' % (port, self.name))