Create alexa_server.py

alexa_server.py

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+""" This is a python 2 script to launch a flask server and communicate with Alexa through Flask-Ask. When it receives commands it uses the AlexaLamp class to 
+send commands to the mood lamp attatched to the Raspberry Pi. Relies on ngrok to be run in a seperate terminal to open up a secure route from the local host to outside internet."""
+
+from flask import Flask 
+from flask_ask import Ask, statement 
+import requests 
+import json 
+import threading
+import math
+import time
+import datetime
+import unicornhat as unicorn
+
+
+class AlexaLamp():
+    def __init__(self):
+        self.light_on = False
+        self.display_cleared = False
+        self.stop_thread = False
+        unicorn.set_layout(unicorn.PHAT)
+        unicorn.rotation(0)
+        unicorn.brightness(0.5)
+
+    def start_rainbow(self):
+        print "starting rainbow"
+        self.light_on = True
+        self.stop_thread = False
+        self.display_cleared = False
+        self.thread_obj = threading.Thread(target=self.rainbow)
+        self.thread_obj.start()
+
+    def stop_rainbow(self):
+        print "stopping rainbow"
+        self.light_on = False
+        self.stop_thread = True
+        self.display_cleared = True
+        self.thread_obj.join()
+        print "closed thread"
+
+    def rainbow(self):
+        i = 0.0
+        offset = 30
+        while not self.stop_thread:
+            if self.light_on:
+                i = i + 0.3
+                for y in range(4):
+                    for x in range(8):
+                        r = 0#x * 32
+                        g = 0#y * 32
+                        xy = x + y / 4
+                        r = (math.cos((x+i)/2.0) + math.cos((y+i)/2.0)) * 64.0 + 128.0
+                        g = (math.sin((x+i)/1.5) + math.sin((y+i)/2.0)) * 64.0 + 128.0
+                        b = (math.sin((x+i)/2.0) + math.cos((y+i)/1.5)) * 64.0 + 128.0
+                        r = max(0, min(255, r + offset))
+                        g = max(0, min(255, g + offset))
+                        b = max(0, min(255, b + offset))
+                        unicorn.set_pixel(x,y,int(r),int(g),int(b))
+                unicorn.show()
+                self.display_cleared = False
+            else:
+                if not self.display_cleared:
+                    unicorn.clear()
+                    unicorn.show()
+                    self.display_cleared = True
+            time.sleep(0.02)
+        unicorn.clear()
+        unicorn.show()
+
+@ask.launch 
+@ask.intent("lightOn") 
+def on(): 
+   print "light on"
+   alexa_lamp.start_rainbow()
+   return statement("Raspberry Pi Light turned on.") 
+
+@ask.intent("lightOff") 
+def off(): 
+   print "light off"
+   alexa_lamp.stop_rainbow() 
+   return statement("Raspberry Pi Light turned off.") 
+
+if __name__ == "__main__": 
+    app = Flask(__name__) 
+    ask = Ask(app, '/') 
+    alexa_lamp = AlexaLamp()
+    app.run(debug=True)