diff --git a/.gitignore b/.gitignore
index caa99c7d1..ffd0d55c8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,4 @@
 bin/
-doc/
 contrib/
 source/src/cip_objects/
 !source/src/cip_objects/CMakeLists.txt
@@ -9,7 +8,6 @@ source/src/cip_objects/
 *.*~
 *~
 CMakeCache.txt
-*.patch
 .idea/
 *.a
 *.cmake
diff --git a/source/doc/STM32/LwIP_HTTP_Server_Netconn_RTOS_OpENer.patch b/source/doc/STM32/LwIP_HTTP_Server_Netconn_RTOS_OpENer.patch
new file mode 100644
index 000000000..01901c897
--- /dev/null
+++ b/source/doc/STM32/LwIP_HTTP_Server_Netconn_RTOS_OpENer.patch
@@ -0,0 +1,172 @@
+diff --git a/Inc/lwipopts.h b/Inc/lwipopts.h
+index ef9dbfa..6a8c593 100644
+--- a/Inc/lwipopts.h
++++ b/Inc/lwipopts.h
+@@ -56,7 +56,9 @@ a lot of data that needs to be copied, this should be set high. */
+ /* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active
+    timeouts. */
+ #define MEMP_NUM_SYS_TIMEOUT    10
+-
++/* MEMP_NUM_NETCONN: the number of struct netconns.
++   (only needed if you use the sequential API, like api_lib.c) */
++#define MEMP_NUM_NETCONN        12
+ 
+ /* ---------- Pbuf options ---------- */
+ /* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
+@@ -94,6 +96,8 @@ a lot of data that needs to be copied, this should be set high. */
+ /* ---------- ICMP options ---------- */
+ #define LWIP_ICMP                       1
+ 
++/* ---------- IGMP options ---------- */
++#define LWIP_IGMP               1
+ 
+ /* ---------- DHCP options ---------- */
+ #define LWIP_DHCP               1
+@@ -113,6 +117,9 @@ a lot of data that needs to be copied, this should be set high. */
+  */
+ #define LWIP_NETIF_LINK_CALLBACK        1
+ 
++/* ---------- Netif options ---------- */
++#define LWIP_NETIF_HOSTNAME             1
++
+ /*
+    --------------------------------------
+    ---------- Checksum options ----------
+@@ -178,7 +185,11 @@ The STM32F4x7 allows computing and verifying the IP, UDP, TCP and ICMP checksums
+ /**
+  * LWIP_SOCKET==1: Enable Socket API (require to use sockets.c)
+  */
+-#define LWIP_SOCKET                     0
++#define LWIP_SOCKET                     1
++/**
++ * SO_REUSE==1: Enable SO_REUSEADDR option.
++ */
++#define SO_REUSE                        1
+ 
+ /*
+    ------------------------------------
+diff --git a/Inc/main.h b/Inc/main.h
+index 36ca85f..fb7961c 100644
+--- a/Inc/main.h
++++ b/Inc/main.h
+@@ -31,7 +31,7 @@
+ 
+ /* Exported types ------------------------------------------------------------*/
+ /* Exported constants --------------------------------------------------------*/ 
+-#define USE_DHCP       /* enable DHCP, if disabled static address is used*/
++//#define USE_DHCP      // not used, replaced by LWIP_DHCP
+ #define USE_LCD
+ 
+ /*Static IP ADDRESS*/
+diff --git a/SW4STM32/syscalls.c b/SW4STM32/syscalls.c
+index fa8687f..6a84edb 100644
+--- a/SW4STM32/syscalls.c
++++ b/SW4STM32/syscalls.c
+@@ -15,7 +15,7 @@
+ #include <reent.h>
+ #include <unistd.h>
+ #include <sys/wait.h>
+-
++#include <stm32f7xx_hal.h>
+ 
+ 
+ #define FreeRTOS
+@@ -99,6 +99,15 @@ void _exit (int status)
+ 	while (1) {}
+ }
+ 
++#if REDIRECT_PRINTF_TO_SWV_ITM
++__attribute__((weak)) int _write(int file, char *ptr, int len) {
++  int DataIdx;
++  for (DataIdx = 0; DataIdx < len; DataIdx++) {
++    ITM_SendChar(*ptr++);
++  }
++  return len;
++}
++#else	// standard output
+ int _write(int file, char *ptr, int len)
+ {
+ 	int DataIdx;
+@@ -109,6 +118,7 @@ int _write(int file, char *ptr, int len)
+ 		}
+ 	return len;
+ }
++#endif	// standard output
+ 
+ int _close(int file)
+ {
+diff --git a/Src/app_ethernet.c b/Src/app_ethernet.c
+index e3278ac..aab6265 100644
+--- a/Src/app_ethernet.c
++++ b/Src/app_ethernet.c
+@@ -28,6 +28,9 @@
+ #include "lcd_log.h"
+ #endif
+ 
++// for OpENer
++#include "opener.h"
++
+ /* Private typedef -----------------------------------------------------------*/
+ /* Private define ------------------------------------------------------------*/
+ /* Private macro -------------------------------------------------------------*/
+@@ -55,6 +58,8 @@ void ethernet_link_status_updated(struct netif *netif)
+     uint8_t iptxt[20];
+     sprintf((char *)iptxt, "%s", ip4addr_ntoa(netif_ip4_addr(netif)));
+     LCD_UsrLog ("Static IP address: %s\n", iptxt);
++    /* Start Ethernet/IP Stack (OpENer) */
++    opener_init(netif);
+ #else
+     BSP_LED_On(LED1);
+     BSP_LED_Off(LED2);
+@@ -124,6 +129,8 @@ void DHCP_Thread(void const * argument)
+           BSP_LED_On(LED1);
+           BSP_LED_Off(LED2);
+ #endif
++          /* Start Ethernet/IP Stack (OpENer) */
++          opener_init(netif);
+         }
+         else
+         {
+@@ -148,6 +155,8 @@ void DHCP_Thread(void const * argument)
+             BSP_LED_On(LED1);
+             BSP_LED_Off(LED2);
+ #endif
++            /* Start Ethernet/IP Stack (OpENer) */
++            opener_init(netif);
+           }
+         }
+       }
+diff --git a/Src/main.c b/Src/main.c
+index c25dbd0..e3dda6c 100644
+--- a/Src/main.c
++++ b/Src/main.c
+@@ -71,6 +71,11 @@ int main(void)
+   /* Configure the system clock to 200 MHz */
+   SystemClock_Config(); 
+   
++  /* For single step debug, e.g. timers with interrupts need to be stopped in Halt */
++  HAL_DBGMCU_EnableDBGStandbyMode();
++  HAL_DBGMCU_EnableDBGStopMode();
++  __HAL_DBGMCU_FREEZE_TIM6();
++  
+   /* Initialize LCD and LEDs */
+   BSP_Config();
+ 
+@@ -139,6 +144,8 @@ static void Netif_Config(void)
+ 
+   /*  Registers the default network interface. */
+   netif_set_default(&gnetif);
++  /*  Define the hostname, is also used by OpENer */
++  netif_set_hostname(&gnetif,"STM32");
+ 
+   ethernet_link_status_updated(&gnetif);
+ 
+@@ -180,7 +187,7 @@ static void BSP_Config(void)
+   LCD_LOG_Init();
+   
+   /* Show Header and Footer texts */
+-  LCD_LOG_SetHeader((uint8_t *)"Webserver Application Netconn API");
++  LCD_LOG_SetHeader((uint8_t *)"Webserver Application Netconn API & OpENer");
+   LCD_LOG_SetFooter((uint8_t *)"STM32746G-DISCO board");
+   
+   LCD_UsrLog ((char *)"  State: Ethernet Initialization ...\n");
diff --git a/source/doc/STM32/OpENer STM32 Paths and Symbols.xml b/source/doc/STM32/OpENer STM32 Paths and Symbols.xml
new file mode 100644
index 000000000..5321aa5e4
--- /dev/null
+++ b/source/doc/STM32/OpENer STM32 Paths and Symbols.xml	
@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<cdtprojectproperties>
+  <section name="org.eclipse.cdt.internal.ui.wizards.settingswizards.IncludePaths">
+    <language id="org.eclipse.cdt.core.assembly" name="s,S"/>
+    <language id="org.eclipse.cdt.core.gcc" name="C Source File">
+      <includepath>../../Inc</includepath>
+      <includepath>../../Src</includepath>
+      <includepath>../../Drivers/CMSIS/Device/ST/STM32F7xx/Include</includepath>
+      <includepath>../../Drivers/STM32F7xx_HAL_Driver/Inc</includepath>
+      <includepath>../../Drivers/BSP/STM32746G-Discovery</includepath>
+      <includepath>../../Drivers/BSP/Components/Common</includepath>
+      <includepath>../../Drivers/BSP/Components</includepath>
+      <includepath>../../Middlewares/Third_Party/LwIP/src/include</includepath>
+      <includepath>../../Middlewares/Third_Party/LwIP/system</includepath>
+      <includepath>../../Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM7/r0p1</includepath>
+      <includepath>../../Middlewares/Third_Party/FreeRTOS/Source</includepath>
+      <includepath>../../Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS</includepath>
+      <includepath>../../Middlewares/Third_Party/FreeRTOS/Source/include</includepath>
+      <includepath>../../Utilities</includepath>
+      <includepath>../../Utilities/Log</includepath>
+      <includepath>../../Drivers/CMSIS/Include</includepath>
+      <includepath>../../Middlewares/Third_Party/OpENer</includepath>
+      <includepath>../../Middlewares/Third_Party/OpENer/cip</includepath>
+      <includepath>../../Middlewares/Third_Party/OpENer/enet_encap</includepath>
+      <includepath>../../Middlewares/Third_Party/OpENer/ports</includepath>
+      <includepath>../../Middlewares/Third_Party/OpENer/ports/STM32</includepath>
+      <includepath>../../Middlewares/Third_Party/OpENer/ports/STM32/sample_application</includepath>
+      <includepath>../../Middlewares/Third_Party/OpENer/utils</includepath>
+    </language>
+    <language name="Object File"/>
+  </section>
+  <section name="org.eclipse.cdt.internal.ui.wizards.settingswizards.Macros">
+    <language id="org.eclipse.cdt.core.assembly" name="s,S"/>
+    <language id="org.eclipse.cdt.core.gcc" name="C Source File">
+      <macro>
+        <name>USE_HAL_DRIVER</name>
+        <value/>
+      </macro>
+      <macro>
+        <name>STM32F746xx</name>
+        <value/>
+      </macro>
+      <macro>
+        <name>USE_STM32746G_DISCOVERY</name>
+        <value/>
+      </macro>
+      <macro>
+        <name>RESTRICT</name>
+        <value>__restrict</value>
+      </macro>
+      <macro>
+        <name>STM32</name>
+        <value/>
+      </macro>
+      <macro>
+        <name>_POSIX_C_SOURCE</name>
+        <value>200112L</value>
+      </macro>
+      <macro>
+        <name>_GNU_SOURCE</name>
+        <value/>
+      </macro>
+      <macro>
+        <name>OPENER_TRACE_LEVEL</name>
+        <value>15</value>
+      </macro>
+      <macro>
+        <name>OPENER_CONSUMED_DATA_HAS_RUN_IDLE_HEADER</name>
+        <value>1</value>
+      </macro>
+      <macro>
+        <name>OPENER_WITH_TRACES</name>
+        <value>1</value>
+      </macro>
+      <macro>
+        <name>PC_OPENER_ETHERNET_BUFFER_SIZE</name>
+        <value>512</value>
+      </macro>
+      <macro>
+        <name>REDIRECT_PRINTF_TO_SWV_ITM</name>
+        <value>1</value>
+      </macro>
+    </language>
+    <language name="Object File"/>
+  </section>
+</cdtprojectproperties>
diff --git a/source/doc/STM32/OpENer STM32 Port.pdf b/source/doc/STM32/OpENer STM32 Port.pdf
new file mode 100644
index 000000000..070d69547
Binary files /dev/null and b/source/doc/STM32/OpENer STM32 Port.pdf differ