diff --git a/esp3d/src/include/version.h b/esp3d/src/include/version.h
index 3810be9a..37b33293 100644
--- a/esp3d/src/include/version.h
+++ b/esp3d/src/include/version.h
@@ -22,7 +22,7 @@
 #define _VERSION_ESP3D_H
 
 //version and sources location
-#define FW_VERSION "3.0.0.a61"
+#define FW_VERSION "3.0.0.a62"
 #define REPOSITORY "https://github.com/luc-github/ESP3D/tree/3.0"
 
 #endif //_VERSION_ESP3D_H
diff --git a/esp3d/src/modules/authentication/authentication_service.cpp b/esp3d/src/modules/authentication/authentication_service.cpp
index 9716bbe1..086bd6a4 100644
--- a/esp3d/src/modules/authentication/authentication_service.cpp
+++ b/esp3d/src/modules/authentication/authentication_service.cpp
@@ -269,9 +269,6 @@ bool AuthenticationService::ClearAuthIP (IPAddress ip, const char * sessionID)
 auth_ip * AuthenticationService::GetAuth (IPAddress ip, const char * sessionID)
 {
     auth_ip * current = _head;
-    //auth_ip * previous = NULL;
-    //get time
-    //uint32_t now = millis();
     while (current) {
         if (ip == current->ip) {
             if (strcmp (sessionID, current->sessionID) == 0) {
@@ -285,6 +282,28 @@ auth_ip * AuthenticationService::GetAuth (IPAddress ip, const char * sessionID)
     return NULL;
 }
 
+//Get time left for specific session
+uint32_t AuthenticationService::getSessionRemaining(const char * sessionID)
+{
+    auth_ip * current = _head;
+    if ((sessionID == nullptr) || (strlen(sessionID) == 0)) {
+        return 0;
+    }
+    while (current) {
+        if (strcmp (sessionID, current->sessionID) == 0) {
+            //found
+            uint32_t now = millis();
+            if ((now - current->last_time) > _sessionTimeout) {
+                return 0;
+            }
+            return _sessionTimeout - (now-current->last_time);
+        }
+        //previous = current;
+        current = current->_next;
+    }
+    return 0;
+}
+
 //Review all IP to reset timers
 level_authenticate_type AuthenticationService::ResetAuthIP (IPAddress ip, const char * sessionID)
 {
diff --git a/esp3d/src/modules/authentication/authentication_service.h b/esp3d/src/modules/authentication/authentication_service.h
index 81cbeefb..07479af1 100644
--- a/esp3d/src/modules/authentication/authentication_service.h
+++ b/esp3d/src/modules/authentication/authentication_service.h
@@ -69,6 +69,7 @@ public:
 #if defined (HTTP_FEATURE)
     static uint32_t setSessionTimeout(uint32_t timeout);
     static uint32_t getSessionTimeout();
+    static uint32_t getSessionRemaining(const char * sessionID);
     static char * create_session_ID();
     static bool ClearCurrentSession ();
     static bool ClearAllSessions ();
diff --git a/esp3d/src/modules/http/handles/handle-command.cpp b/esp3d/src/modules/http/handles/handle-command.cpp
index f23041a5..ee99a2d0 100644
--- a/esp3d/src/modules/http/handles/handle-command.cpp
+++ b/esp3d/src/modules/http/handles/handle-command.cpp
@@ -49,8 +49,7 @@ void HTTP_Server::handle_web_command ()
         esp3d_commands.process((uint8_t*)cmd.c_str(), cmd.length(), &output, auth_level);
     } else if (_webserver->hasArg ("ping")) {
         _webserver->send (200);
-        }
-    else {
+    } else {
         _webserver->send (400, "text/plain", "Invalid command");
     }
     return;
diff --git a/esp3d/src/modules/websocket/websocket_server.cpp b/esp3d/src/modules/websocket/websocket_server.cpp
index c2d0c1d8..c27d8300 100644
--- a/esp3d/src/modules/websocket/websocket_server.cpp
+++ b/esp3d/src/modules/websocket/websocket_server.cpp
@@ -29,6 +29,7 @@
 #include "../../core/settings_esp3d.h"
 #include "../../core/esp3doutput.h"
 #include "../../core/commands.h"
+#include "../authentication/authentication_service.h"
 
 WebSocket_Server websocket_terminal_server;
 #if defined(WS_DATA_FEATURE)
@@ -89,23 +90,35 @@ void handle_Websocket_Terminal_Event(uint8_t num, uint8_t type, uint8_t * payloa
 {
     (void)payload;
     (void)length;
+    String msg;
     switch(type) {
     case WStype_DISCONNECTED:
         log_esp3d("[%u] Socket Disconnected port %d!", num,websocket_terminal_server.port());
         break;
     case WStype_CONNECTED: {
-        String s = "currentID:" + String(num);
+        msg = "currentID:" + String(num);
         // send message to client
         websocket_terminal_server.set_currentID(num);
-        websocket_terminal_server.pushMSG(num, s.c_str());
-        s = "activeID:" + String(num);
-        websocket_terminal_server.pushMSG(s.c_str());
+        websocket_terminal_server.pushMSG(num, msg.c_str());
+        msg = "activeID:" + String(num);
+        websocket_terminal_server.pushMSG(msg.c_str());
         log_esp3d("[%u] Socket connected port %d", num,websocket_terminal_server.port());
     }
     break;
     case WStype_TEXT:
-        //we do not expect any input
-        //log_esp3d("[IGNORED][%u] get Text: %s  port %d", num, payload, websocket_terminal_server.port());
+#if defined (AUTHENTICATION_FEATURE)
+        //we do not expect any input but ping to get session timeout if any
+        if (AuthenticationService::getSessionTimeout() != 0) {
+            msg = (const char*)payload;
+            if (msg.startsWith("PING:")) {
+                String session = msg.substring(5);
+                String response = "PING:"+String(AuthenticationService::getSessionRemaining(session.c_str()));
+                response += ":"+String(AuthenticationService::getSessionTimeout());
+                websocket_terminal_server.pushMSG(num, response.c_str());
+            }
+        }
+#endif //AUTHENTICATION_FEATURE 
+        log_esp3d("[IGNORED][%u] get Text: %s  port %d", num, payload, websocket_terminal_server.port());
         break;
     case WStype_BIN:
         //we do not expect any input