diff --git a/AIS/bsmd.AIS2Service/SerialTCPReader.cs b/AIS/bsmd.AIS2Service/SerialTCPReader.cs
index bdfd6f5c..af2b5d7d 100644
--- a/AIS/bsmd.AIS2Service/SerialTCPReader.cs
+++ b/AIS/bsmd.AIS2Service/SerialTCPReader.cs
@@ -19,7 +19,7 @@ namespace bsmd.AIS2Service
         private TcpClient tcpSocket;
         private Thread _thread;
 
-        private const int sleepRetry = 30000;
+        private const int sleepRetry = 60000;
         private const int maxRetries = 3;
 
         private static readonly ILog _log = LogManager.GetLogger(typeof(SerialTCPReader));
@@ -56,12 +56,17 @@ namespace bsmd.AIS2Service
                 {
                     _log.WarnFormat("Exception occurred on serial reader: {0}", ex.Message);
                 }
+                finally
+                {
+                    this.tcpSocket?.Close();
+                }
             }
         }
 
         private bool Connect()
         {
             int retryCounter = 0;
+            int retryTime = sleepRetry;
             while (retryCounter < maxRetries)
             {
                 try
@@ -73,8 +78,9 @@ namespace bsmd.AIS2Service
                 catch (Exception ex)
                 {
                     retryCounter++;
+                    retryTime *= 2;
                     _log.WarnFormat("connect failed: {0}, retrying {1}", ex.Message, retryCounter);
-                    Thread.Sleep(sleepRetry);
+                    Thread.Sleep(retryTime);
                 }
             }
             return false;
diff --git a/AIS/bsmd.AIS2Service/update.js b/AIS/bsmd.AIS2Service/update.js
index a221b707..440c1f3c 100644
--- a/AIS/bsmd.AIS2Service/update.js
+++ b/AIS/bsmd.AIS2Service/update.js
@@ -1,5 +1,5 @@
 function update() {
-    fetch('http://localhost:9050/api/ais')
+    fetch('http://192.168.2.25:9050/api/ais')
         .then(function (response) {
             return response.json();
         })
@@ -17,6 +17,7 @@
 
             if(row == null) { // not found, create new row
                 row = document.createElement('tr');
+                row.setAttribute("id", row_id);
                 row.innerHTML = `<td>` + data[i].MMSI + 
                     `</td><td id="name_` + data[i].MMSI + `"/>` + 
                     `<td id="timestamp_` + data[i].MMSI + `"/>` +