diff --git a/pyButtons.py b/pyButtons.py
index 2056ed2..3143c7e 100644
--- a/pyButtons.py
+++ b/pyButtons.py
@@ -21,8 +21,9 @@ client = None
 debounce = 0.25
 
 def on_message(client, userdata, msg):
-    print(f"{msg.topic} -> {str(msg.payload)}")
-    if "STOP" in str(msg.payload):
+    global isRunning
+    print(f"{msg.topic} -> {str(msg.payload.decode('ascii'))}")
+    if "STOP" in msg.payload.decode('ascii'):
         isRunning = False
     pass
 
@@ -69,7 +70,7 @@ def main():
                 client.connect('localhost',1883)
                 client.subscribe(MQTT_RECEIVE)
                 client.on_message = on_message
-            #evento premuto    
+            #evento premuto
             btn_su.when_pressed = send_SU
             btn_giu.when_pressed = send_GIU
             btn_sx.when_pressed = send_SX
@@ -83,7 +84,6 @@ def main():
             btn_dx.when_held = send_DX
             btn_ok.when_held = send_OK
             btn_can.when_held = send_CAN
-
             while isRunning:
                 client.loop(timeout=1)
                 time.sleep(1)
@@ -93,7 +93,7 @@ def main():
             client=None
             pass
         pass
-    
+
 if __name__=="__main__":
     sys.exit(main())