Fix bug.

relay.py

@@ -70,7 +70,8 @@ def init_serial(pPort):
 init_serial(device)
 if action != 'status':
   for relay in relays:
-    ser.write(relay.encode('ascii')+action+'\r\n')
+    command = relay+action+'\r\n'
+    ser.write(command.encode('ascii'))
     bytes = ser.readline() 
     #print ('Renvoie :\r\n' + bytes)