Add controller

controller/main.py

@@ -0,0 +1,70 @@
+from gpiozero import LED, Button
+from time import sleep
+import paho.mqtt.client as mqtt
+
+red = LED(19)
+blue = LED(26)
+green = LED(13)
+button = Button(5)
+
+def main ():
+    idle = False
+    while True:
+        if not idle:
+            send_idle()
+            idle = True
+        sleep(5)
+        red.on()
+        send_stop()
+        if buttonWait():
+            red.off()
+            idle = False
+            playaudio()
+            displaytext()
+            sleep(5)
+            playaudio()
+            displaytext()
+            green.on()
+            printquestion()
+            sleep(1) 
+            green.off()       
+        red.off()   
+
+def buttonWait():
+    for i in range(500):
+        if button.value:
+            print("Button pressed")
+            return True
+        sleep(0.01)
+    return False
+
+def send_idle():
+    print("Idle")
+    client = mqtt.Client()
+    client.connect("localhost", 1883, 60)
+    client.publish("slave", "idle")
+
+def playaudio():
+    print("Play audio")
+    client = mqtt.Client()
+    client.connect("localhost", 1883, 60)
+    client.publish("slave", "audio")
+
+
+def playvideo():
+    pass
+
+def displaytext():
+    print("Display text")
+
+def printquestion():
+    print("Question")
+    client = mqtt.Client()
+    client.connect("localhost", 1883, 60)
+    client.publish("print", "question")
+
+def send_stop():
+    pass
+
+
+main()