diff --git a/app/src/main/java/com/flywithu/carnav/RealService.java b/app/src/main/java/com/flywithu/carnav/RealService.java
index 7ef1649..b7f22ab 100644
--- a/app/src/main/java/com/flywithu/carnav/RealService.java
+++ b/app/src/main/java/com/flywithu/carnav/RealService.java
@@ -44,6 +44,22 @@ public class RealService extends Service {
     public RealService() {
     }
 
+    private void sendSerial(String str)
+    {
+        if(sPort!=null)
+        {
+            try {
+                sPort.write(str.getBytes(), 3000);
+            }
+            catch(Exception e)
+            {
+
+            }
+
+        }
+
+    }
+
     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {
         serviceIntent = intent;
@@ -98,7 +114,16 @@ public class RealService extends Service {
                     sPort = null;
                 }
                 //set the time
-   
+                //TMST001801140907
+                //TMST00YYDDDD0907
+
+                SimpleDateFormat format1 = new SimpleDateFormat ( "00yyMMddHHmm");
+                //   String f = format1.format(System.currentTimeMillis());
+                String currentInfo = format1.format(new Date());
+                String currentTime = String.format("TMST%s",currentInfo);
+                sendSerial(currentTime);
+
+                showToast(getApplication(),currentTime);
 
 //                try {
 //                    sPort.write("zxcv".getBytes(), 50);
diff --git a/app/src/test/java/com/flywithu/carnav/ExampleUnitTest.java b/app/src/test/java/com/flywithu/carnav/ExampleUnitTest.java
index e90aded..ef04165 100644
--- a/app/src/test/java/com/flywithu/carnav/ExampleUnitTest.java
+++ b/app/src/test/java/com/flywithu/carnav/ExampleUnitTest.java
@@ -2,6 +2,10 @@ package com.flywithu.carnav;
 
 import org.junit.Test;
 
+import java.text.SimpleDateFormat;
+import java.time.LocalDateTime;
+import java.util.Date;
+
 import static org.junit.Assert.*;
 
 /**
@@ -14,4 +18,22 @@ public class ExampleUnitTest {
     public void addition_isCorrect() {
         assertEquals(4, 2 + 2);
     }
+
+    @Test
+    public void checkDate()
+    {
+        LocalDateTime currentDateTime = LocalDateTime.now();
+        //TMST001801140907
+        //TMST00YYDDDD0907
+
+        Date myDate = new Date ( "Sun,5 Dec 1999 00:07:21" );
+
+
+        SimpleDateFormat format1 = new SimpleDateFormat ( "yy MM dd HH mm");
+     //   String f = format1.format(System.currentTimeMillis());
+        String f = format1.format(myDate);
+        System.out.println(f);
+
+
+    }
 }
\ No newline at end of file