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Projects/LED_Fade/led_fade.py

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+# Adjust LED brightness by rotating Potentiometer
+
+# GrovePi + Rotary Angle Sensor (Potentiometer) + LED
+# http://www.seeedstudio.com/wiki/Grove_-_Rotary_Angle_Sensor
+# http://www.seeedstudio.com/wiki/Grove_-_LED_Socket_Kit
+
+'''
+The MIT License (MIT)
+
+GrovePi for the Raspberry Pi: an open source platform for connecting Grove Sensors to the Raspberry Pi.
+Copyright (C) 2017  Dexter Industries
+
+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 grovepi
+
+# Connect the Rotary Angle Sensor to analog port A2
+potentiometer = 2
+
+# Connect the LED to digital port D5
+led = 5
+
+grovepi.pinMode(led,"OUTPUT")
+time.sleep(1)
+i = 0
+
+while True:
+    try:
+        # Read resistance from Potentiometer
+        i = grovepi.analogRead(potentiometer)
+        print(i)
+
+        # Send PWM signal to LED
+        grovepi.analogWrite(led,i//4)
+
+    except IOError:
+        print("Error")