diff --git a/arduinosender/CommunicationMain.py b/arduinosender/CommunicationMain.py
index 1d845e7..d7b9db0 100644
--- a/arduinosender/CommunicationMain.py
+++ b/arduinosender/CommunicationMain.py
@@ -1,5 +1,6 @@
 import serial
 import argparse
+from time import sleep
 
 from serial import SerialException
 
@@ -9,20 +10,26 @@ if __name__ == "__main__":
 	parser.add_argument('-c', required = True, help = 'Arduino com port')
 	parser.add_argument('-t', required = False, type = int, help = 'Communication timout')
 	parser.add_argument('-b', required = False, type = int, help = 'Communication baudrate')
+	parser.add_argument('-waittime', required = False, type = int, help = 'Sleep time before sending (s)')
 	args = parser.parse_args()
 	
 	timeoutCom = 2
 	baudRate = 9600
+	commandTimeout = 0
+	waitTime = 1
 	
 	if args.t:
 		timeoutCom = int(args.t)
 	if args.b:
 		baudRate = int(args.b)
+	if args.waittime:
+		waitTime = int(args.waittime)
 		
 	ser = None
 	try:
 		ser = serial.Serial(args.c, baudRate, timeout = timeoutCom)
-		
+		sleep(waitTime)
+	
 		file = open(args.g, 'r')
 		lines = file.readlines()
 		file.close()
@@ -30,10 +37,25 @@ if __name__ == "__main__":
 		for line in lines:
 			if not line == '\n':
 				ser.write(line.encode('UTF-8'))
-				if not ser.readline().decode('UTF-8').startswith('1'):
+
+				if not ser.readline().decode('UTF-8').startswith('2'):
 					raise RuntimeError('Communication lost')
+
+				while True:
+					received = ser.readline().decode('UTF-8')
+					if not received.startswith('1') or received.startswith('-1'):
+						commandTimeout += 1
+						if commandTimeout > timeoutCom * 10:
+							raise RuntimeError('Command not executed')
+						if received.startswith('-1'):
+							raise RuntimeError('Command error')
+					else:
+						break
+
+		print('Done')
 		
 		ser.close()
+		
 	except SerialException as errSE:
 		print('Serial Exception' + str(errSE))
 	except RuntimeError as errRE: