grove: added GroveRelay class for Grove Relay

Signed-off-by: Alexandru Radovici <alexandru.radovici@wyliodrin.com>
Signed-off-by: Sarah Knepper <sarah.knepper@intel.com>

examples/python/groverelay.py

@@ -0,0 +1,44 @@
+# Author: Sarah Knepper <sarah.knepper@intel.com>
+# Copyright (c) 2015 Intel Corporation.
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+import time
+import pyupm_grove as grove
+
+# Create the relay switch object using GPIO pin 0
+relay = grove.GroveRelay(0)
+
+# Close and then open the relay switch 3 times,
+# waiting one second each time.  The LED on the relay switch
+# will light up when the switch is on (closed).
+# The switch will also make a noise between transitions.
+for i in range (0,3):
+    relay.on()
+    if relay.isOn():
+        print relay.name(), 'is on'
+    time.sleep(1)
+    relay.off()
+    if relay.isOff():
+        print relay.name(), 'is off'
+    time.sleep(1)
+
+# Delete the relay switch object
+del relay