diff --git a/include/HTTPServer.h b/include/HTTPServer.h
index 41fd938..566d8c6 100644
--- a/include/HTTPServer.h
+++ b/include/HTTPServer.h
@@ -86,9 +86,6 @@ typedef struct
     void (*HandlerRoutine)(char *VarData, void *arg);
 } dyn_var_handler_t;
 
-void regHTTPPrintCustom(int (*print_handler)(httpd_req_t *req, char *buf, char *var, int arg));
-void regAfterPostHandlerCustom(HTTP_IO_RESULT (*post_handler)(httpd_req_t *req, const char *filename, char *PostData));
-
 esp_err_t start_file_server(void);
 HTTP_IO_RESULT HTTPPostApp(httpd_req_t *req, const char *filename, char *PostData);
 int HTTPPrint(httpd_req_t *req, char* buf, char* var);
diff --git a/include/MQTT.h b/include/MQTT.h
index 4d36659..5258ea7 100644
--- a/include/MQTT.h
+++ b/include/MQTT.h
@@ -73,7 +73,6 @@ typedef struct
 mqtt_client_t* GetMQTTHandlesPool(int idx);
 QueueHandle_t GetMQTTSendQueue(int idx);
 void ComposeTopic(char *topic, int idx, char *service_name, char *direct);
-void regUserEventHandler(void (*event_handler)(int idx, void *handler_args, esp_event_base_t base, int32_t event_id, void *event_data), void* user_arg);
 void SystemDataHandler(char *data, uint32_t len, int idx);
 
 mqtt_app_err_t PublicTestMQTT(int idx);
diff --git a/include/NetTransport.h b/include/NetTransport.h
index 673b935..5980406 100644
--- a/include/NetTransport.h
+++ b/include/NetTransport.h
@@ -108,7 +108,6 @@ void GetRFC3339Time(char *t);
 void StartTimeGet(void);
 
 esp_err_t StartOTA(void);
-void regHookBeforeUpdate(void (*before_update)(void));
 char* GetAvailVersion();
 char* GetUpdateStatus();
 
diff --git a/include/UserCallbacks.h b/include/UserCallbacks.h
new file mode 100644
index 0000000..890e4a0
--- /dev/null
+++ b/include/UserCallbacks.h
@@ -0,0 +1,42 @@
+ /* Copyright 2023 Bogdan Pilyugin
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *   File name: UserCallbacks.h
+ *     Project: webguiapp_ref_implement
+ *  Created on: 2023-04-22
+ *      Author: bogdan
+ * Description:	
+ */
+
+#ifndef COMPONENTS_WEBGUIAPP_INCLUDE_USERCALLBACKS_H_
+#define COMPONENTS_WEBGUIAPP_INCLUDE_USERCALLBACKS_H_
+#include "HTTPServer.h"
+
+//Callback for current time obtain notification
+void regTimeSyncCallback(void (*time_sync)(struct timeval *tv));
+
+//Callback called just before OTA, aimed user can finish all job must finished on update and reboot
+void regHookBeforeUpdate(void (*before_update)(void));
+
+//MQTT incoming data callback
+void regUserEventHandler(void (*event_handler)(int idx, void *handler_args, esp_event_base_t base, int32_t event_id, void *event_data), void* user_arg);
+
+//User handler of output '~var~' styled dynamic variables. Calls on give out files in response to GET requests.
+void regHTTPPrintCustom(int (*print_handler)(httpd_req_t *req, char *buf, char *var, int arg));
+
+//User handler of variables 'var1=value1&var2=value2' styled in POST requests.
+void regAfterPostHandlerCustom(HTTP_IO_RESULT (*post_handler)(httpd_req_t *req, const char *filename, char *PostData));
+
+
+#endif /* COMPONENTS_WEBGUIAPP_INCLUDE_USERCALLBACKS_H_ */
diff --git a/include/webguiapp.h b/include/webguiapp.h
index ab37254..05f2715 100644
--- a/include/webguiapp.h
+++ b/include/webguiapp.h
@@ -34,6 +34,8 @@
 #include "esp_system.h"
 #include "driver/spi_master.h"
 
+#include "UserCallbacks.h"
+
 esp_err_t spi_device_polling_transmit_synchronized(spi_device_handle_t handle, spi_transaction_t *trans_desc);
 
 bool GetUserAppNeedReset(void);
diff --git a/src/HTTPPostSystem.c b/src/HTTPPostSystem.c
index 7258519..a129521 100644
--- a/src/HTTPPostSystem.c
+++ b/src/HTTPPostSystem.c
@@ -25,6 +25,7 @@
 #include "LoRaWAN.h"
 #include "Helpers.h"
 #include "MQTT.h"
+#include "UserCallbacks.h"
 
 static const char *TAG = "HTTPServerPost";
 
diff --git a/src/HTTPPrintSystem.c b/src/HTTPPrintSystem.c
index fac817e..9b52fe4 100644
--- a/src/HTTPPrintSystem.c
+++ b/src/HTTPPrintSystem.c
@@ -30,6 +30,7 @@
 #include "romfs.h"
 #include "esp_idf_version.h"
 #include "jWrite.h"
+#include "UserCallbacks.h"
 
 static const char *TAG = "HTTPServerPrint";
 
diff --git a/src/MQTT.c b/src/MQTT.c
index 9f7b647..d8e89fd 100644
--- a/src/MQTT.c
+++ b/src/MQTT.c
@@ -23,6 +23,7 @@
 #include "Helpers.h"
 #include "NetTransport.h"
 #include "MQTT.h"
+#include "UserCallbacks.h"
 
 #define MQTT_DEBUG_MODE  1
 
diff --git a/src/SNTP.c b/src/SNTP.c
index 76ebf06..f619ee0 100644
--- a/src/SNTP.c
+++ b/src/SNTP.c
@@ -22,10 +22,19 @@
 #include "esp_sntp.h"
 #include "esp_timer.h"
 #include "NetTransport.h"
+#include "UserCallbacks.h"
 #define YEAR_BASE (1900) //tm structure base year
 
 static uint32_t UpTime = 0;
 
+//Pointer to extend user on time got callback
+static void (*time_sync_notif)(struct timeval *tv) = NULL;
+
+void regTimeSyncCallback(void (*time_sync)(struct timeval *tv))
+{
+    time_sync_notif = time_sync;
+}
+
 static void initialize_sntp(void);
 
 
@@ -52,7 +61,8 @@ static void obtain_time(void *pvParameter)
 
 static void time_sync_notification_cb(struct timeval *tv)
 {
-
+    if(time_sync_notif)
+        time_sync_notif(tv);
 }
 
 static void initialize_sntp(void)