diff --git a/include/webguiapp.h b/include/webguiapp.h
index 05f2715..5a0cf57 100644
--- a/include/webguiapp.h
+++ b/include/webguiapp.h
@@ -40,5 +40,6 @@ esp_err_t spi_device_polling_transmit_synchronized(spi_device_handle_t handle, s
 
 bool GetUserAppNeedReset(void);
 void SetUserAppNeedReset(bool res);
+void LogFile(char *fname, char *mess);
 
 #endif /* COMPONENTS_WEBGUIAPPCOMPONENT_INCLUDE_WEBGUIAPP_H_ */
diff --git a/src/WebGUIAppMain.c b/src/WebGUIAppMain.c
index c874fe5..d84864c 100644
--- a/src/WebGUIAppMain.c
+++ b/src/WebGUIAppMain.c
@@ -65,7 +65,6 @@ StaticSemaphore_t xSemaphoreSPIBuf;
 
 #define NETWORK_START_TIMEOUT (5)
 
-static int NetworkStartTimeout = 0;
 static bool isUserAppNeedReset = false;
 
 static void InitSysIO(void);
@@ -511,3 +510,22 @@ void SetUserAppNeedReset(bool res)
     isUserAppNeedReset = res;
 }
 
+void LogFile(char *fname, char *mess)
+{
+    char filename[32];
+    strcpy(filename, "/data/");
+    strcat(filename, fname);
+    FILE *f = fopen(filename, "a");
+    if (f == NULL)
+    {
+        ESP_LOGE(TAG, "Failed to open file %s for writing", filename);
+        return;
+    }
+    fwrite(esp_log_system_timestamp(), 1, 12, f);
+    fwrite(" ", 1, 1, f);
+    fwrite(mess, 1, strlen(mess), f);
+    fwrite("\r\n", 1, 2, f);
+    fclose(f);
+    ESP_LOGI(TAG, "File written to %s", filename);
+}
+