the test main needed setup()

src/main/TestUDPController.java

@@ -17,6 +17,7 @@ public class TestUDPController {
     public static void main(String[] args) {
 
         UDPController cntrl = new UDPController();
+        cntrl.setUp();
         for (int i = 0; i < util.UDPConstants.TrialSet.length; i++) {
             cntrl.sendTrialAndRecvResponse(i);
         }

udp.py

 import socket
 
 UDP_IP = "127.0.0.1"
-UDP_PORT = 9001
-
+UDP_PORT = 9223
+MESSAGE = "123,1,START"
 sd = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-socket.bind((UDP_IP, UDP_PORT))
-while True:
-	data, addr = sd.recvfrom(1024)
-	print("recv: ", data)
\ No newline at end of file
+sd.sendto(MESSAGE, (UDP_IP, UDP_PORT))
+#sd.bind((UDP_IP, UDP_PORT))
+#while True:
+#	data, addr = sd.recvfrom(1024)
+#	print("recv: ", data)