Move code to main(), use configparser

lighting.py

 #!/usr/bin/env python3
 
-import sys
 from time import sleep
 from random import randint
+import configparser
 
 import zmq
 import spidev
@@ -28,22 +28,23 @@ def light_flame():
     spi.open(1, 0)
 
     while True:
-        ws2812.write2812(spi, [get_color()])
+        ws2812.write2812(spi, [get_color() * 4])
         sleep(0.2)
 
 
 def main():
-    port = "5556"
-    if len(sys.argv) > 1:
-        port = sys.argv[1]
-        int(port)
+    config = configparser.ConfigParser({'host': '10.10.10.1', 'port': '5556'})
+    config.read('config.cfg')
+
+    port = config['port']
+    host = config['host']
 
     # Socket to talk to server
     context = zmq.Context()
     socket = context.socket(zmq.SUB)
 
     print("Connecting to coordinator...")
-    socket.connect(f"tcp://localhost:{port}")
+    socket.connect(f"tcp://{host}:{port}")
 
     topicfilter = "events"
     socket.setsockopt(zmq.SUBSCRIBE, topicfilter)
@@ -59,3 +60,7 @@ def main():
             light_flame()
         else:
             print("Unhandled message")
+
+
+if __name__ == "__main__":
+    main()

servo.py

 #!/usr/bin/env python3
 
 import zmq
-import sys
-
 import subprocess
+import configparser
 
 
 def prime_stages():
@@ -20,17 +19,18 @@ def separate_stage_two():
 
 
 def main():
-    port = "5556"
-    if len(sys.argv) > 1:
-        port = sys.argv[1]
-        int(port)
+    config = configparser.ConfigParser({'host': '10.10.10.1', 'port': '5556'})
+    config.read('config.cfg')
+
+    port = config['port']
+    host = config['host']
 
     # Socket to talk to server
     context = zmq.Context()
     socket = context.socket(zmq.SUB)
 
     print("Connecting to coordinator...")
-    socket.connect(f"tcp://localhost:{port}")
+    socket.connect(f"tcp://{host}:{port}")
 
     topicfilter = "events"
     socket.setsockopt(zmq.SUBSCRIBE, topicfilter)

sound.py

 #!/usr/bin/env python3
 
 import pygame as pg
-import time
 from threading import Timer
 import zmq
-import sys
+import configparser
 
-pg.mixer.init()
-pg.init(44100, size=-16, channels=2, buffer=4096)
-pg.mixer.set_num_channels(3)  # default is 8
 
-#carico i file audio
-lancio = pg.mixer.Sound('sounds/lancio.wav')
-stageOne = pg.mixer.Sound('sounds/stageOne.wav')
-stageTwo = pg.mixer.Sound('sounds/stageTwo.wav')
+# fade out
+def endMission():
+    pg.mixer.Channel(0).fadeout(5)
+    pass
 
-#tempo di fine suono dopo secondo modulo
-t = Timer(30.0, endMission)
 
-port = "5556"
-if len(sys.argv) > 1:
-    port = sys.argv[1]
-    int(port)
+def main():
+    config = configparser.ConfigParser({'host': '10.10.10.1', 'port': '5556'})
+    config.read('config.cfg')
 
-# Socket to talk to server
-context = zmq.Context()
-socket = context.socket(zmq.SUB)
+    port = config['port']
+    host = config['host']
 
-print("Connecting to coordinator...")
-socket.connect(f"tcp://localhost:{port}")
+    pg.mixer.init()
+    pg.init(44100, size=-16, channels=2, buffer=4096)
+    pg.mixer.set_num_channels(3)  # default is 8
 
-topicfilter = "events"
-socket.setsockopt(zmq.SUBSCRIBE, topicfilter)
+    # carico i file audio
+    lancio = pg.mixer.Sound('sounds/lancio.wav')
+    stageOne = pg.mixer.Sound('sounds/stageOne.wav')
+    stageTwo = pg.mixer.Sound('sounds/stageTwo.wav')
 
-while True:
-    string = socket.recv()
-    topic, messagedata = string.split()
+    # tempo di fine suono dopo secondo modulo
+    t = Timer(30.0, endMission)
 
-    if messagedata == "pre_launch":
-        pg.mixer.Channel(0).play(lancio)
-    elif messagedata == "stage_1_separation":
-        pg.mixer.Channel(1).play(stageOne)
-    elif messagedata == "stage_2_separation":
-        pg.mixer.Channel(2).play(stageTwo)
-        t.start()
-    else:
-        print("Unhandled message")
+    # Socket to talk to server
+    context = zmq.Context()
+    socket = context.socket(zmq.SUB)
 
-    print(topic, messagedata)
+    print("Connecting to coordinator...")
+    socket.connect(f"tcp://{host}:{port}")
 
-#fade out
-def endMission():
-    pg.mixer.Channel(0).fadeout(5)
-    pass
+    topicfilter = "events"
+    socket.setsockopt(zmq.SUBSCRIBE, topicfilter)
+
+    while True:
+        string = socket.recv()
+        topic, messagedata = string.split()
+
+        if messagedata == "pre_launch":
+            pg.mixer.Channel(0).play(lancio)
+        elif messagedata == "stage_1_separation":
+            pg.mixer.Channel(1).play(stageOne)
+        elif messagedata == "stage_2_separation":
+            pg.mixer.Channel(2).play(stageTwo)
+            t.start()
+        else:
+            print("Unhandled message")
+
+        print(topic, messagedata)
+
+
+if __name__ == "__main__":
+    main()