Fix binary string comparison

lighting.py

@@ -54,9 +54,9 @@ def main():
         topic, messagedata = string.split()
         print(topic, messagedata)
 
-        if messagedata == "liftoff":
+        if messagedata == b"liftoff":
             light_flame()
-        elif messagedata == "stage_1_separation":
+        elif messagedata == b"stage_1_separation":
             light_flame()
         else:
             print("Unhandled message")

servo.py

@@ -41,9 +41,9 @@ def main():
         string = socket.recv()
         topic, messagedata = string.split()
 
-        if messagedata == "stage_1_separation":
+        if messagedata == b"stage_1_separation":
             separate_stage_one()
-        elif messagedata == "stage_2_separation":
+        elif messagedata == b"stage_2_separation":
             separate_stage_two()
         else:
             print("Unhandled message")

sound.py

@@ -45,11 +45,11 @@ def main():
         string = socket.recv()
         topic, messagedata = string.split()
 
-        if messagedata == "pre_launch":
+        if messagedata == b"pre_launch":
             pg.mixer.Channel(0).play(lancio)
-        elif messagedata == "stage_1_separation":
+        elif messagedata == b"stage_1_separation":
             pg.mixer.Channel(1).play(stageOne)
-        elif messagedata == "stage_2_separation":
+        elif messagedata == b"stage_2_separation":
             pg.mixer.Channel(2).play(stageTwo)
             t.start()
         else: