diff --git a/src/utility/STM32_WPAN/LICENSE.md b/src/utility/STM32_WPAN/LICENSE.md
index 1af52330..4e70ee7c 100644
--- a/src/utility/STM32_WPAN/LICENSE.md
+++ b/src/utility/STM32_WPAN/LICENSE.md
@@ -1,3 +1,31 @@
+## Overview
+
+
+This Software Bill Of Material (SBOM) lists the software components of this
+software package, including the copyright owner and license terms for each
+component.
+
+__SOFTWARE BILL OF MATERIALS__
+
+Component                | Copyright                                                         | License
+---------                | ----------------------------------------------------------------- | -------
+Bluetooth Low Energy     | STMicroelectronics                                                | SLA
+Bluetooth Low Energy LLD | STMicroelectronics                                                | SLA
+Interface                | STMicroelectronics                                                | SLA
+MAC 802.15.4             | STMicroelectronics                                                | SLA
+PHY                      | STMicroelectronics                                                | SLA
+OpenThread               | The OpenThread Authors                                            | BSD-3-Clause
+Utilities                | STMicroelectronics, Amazon.com Inc.                               | SLA, MIT
+Zigbee                   | Exegin Technologies Limited, STMicroelectronics, Dr Brian Gladman | SLA
+
+
+__Notes:__ If the license is an open source license, then you can access the
+terms at [www.opensource.org](https://opensource.org/). Otherwise, the full
+license terms are below. If a component is not listed in the SBOM, then the SLA
+shall apply unless other terms are clearly stated in the package.
+
+
+
 SLA0044 Rev5/February 2018
 
 ## Software license agreement
diff --git a/src/utility/STM32_WPAN/README.md b/src/utility/STM32_WPAN/README.md
index f50589ee..a9b3969a 100644
--- a/src/utility/STM32_WPAN/README.md
+++ b/src/utility/STM32_WPAN/README.md
@@ -1,6 +1,6 @@
 
 ## Source
 
-[STMicroelectronics/STM32CubeWB Release v1.20.0](https://github.com/STMicroelectronics/STM32CubeWB/releases/tag/v1.20.0)
-- Application: [BLE_TransparentMode](https://github.com/STMicroelectronics/STM32CubeWB/tree/v1.20.0/Projects/P-NUCLEO-WB55.Nucleo/Applications/BLE/BLE_TransparentMode)
+[STMicroelectronics/STM32CubeWB Release v1.21.0](https://github.com/STMicroelectronics/STM32CubeWB/releases/tag/v1.21.0)
+- Application: [BLE_TransparentMode](https://github.com/STMicroelectronics/STM32CubeWB/tree/v1.21.0/Projects/P-NUCLEO-WB55.Nucleo/Applications/BLE/BLE_TransparentMode)
 
diff --git a/src/utility/STM32_WPAN/app_conf_default.h b/src/utility/STM32_WPAN/app_conf_default.h
index 9509a0f5..ff2dc017 100644
--- a/src/utility/STM32_WPAN/app_conf_default.h
+++ b/src/utility/STM32_WPAN/app_conf_default.h
@@ -687,6 +687,7 @@ typedef enum
   /* USER CODE BEGIN CFG_SCH_Prio_Id_t */
 
   /* USER CODE END CFG_SCH_Prio_Id_t */
+  CFG_SCH_PRIO_NBR
 } CFG_SCH_Prio_Id_t;
 
 /**
diff --git a/src/utility/STM32_WPAN/tl_mbox.c b/src/utility/STM32_WPAN/tl_mbox.c
index 40c96793..9a2a2973 100644
--- a/src/utility/STM32_WPAN/tl_mbox.c
+++ b/src/utility/STM32_WPAN/tl_mbox.c
@@ -676,6 +676,7 @@ static void OutputDbgTrace(TL_MB_PacketType_t packet_type, uint8_t* buffer)
 {
   TL_EvtPacket_t *p_evt_packet;
   TL_CmdPacket_t *p_cmd_packet;
+  TL_EvtSerial_t *p_cmd_rsp_packet;
 
   switch(packet_type)
   {
@@ -799,28 +800,28 @@ static void OutputDbgTrace(TL_MB_PacketType_t packet_type, uint8_t* buffer)
       break;
 
     case TL_MB_SYS_CMD_RSP:
-      p_evt_packet = (TL_EvtPacket_t*)buffer;
-      switch(p_evt_packet->evtserial.evt.evtcode)
+      p_cmd_rsp_packet = (TL_EvtSerial_t*)buffer;
+      switch(p_cmd_rsp_packet->evt.evtcode)
       {
         case TL_BLEEVT_CC_OPCODE:
-          TL_SHCI_CMD_DBG_MSG("sys rsp: 0x%02X", p_evt_packet->evtserial.evt.evtcode);
-          TL_SHCI_CMD_DBG_MSG(" cmd opcode: 0x%02X", ((TL_CcEvt_t*)(p_evt_packet->evtserial.evt.payload))->cmdcode);
-          TL_SHCI_CMD_DBG_MSG(" status: 0x%02X", ((TL_CcEvt_t*)(p_evt_packet->evtserial.evt.payload))->payload[0]);
-          if((p_evt_packet->evtserial.evt.plen-4) != 0)
+          TL_SHCI_CMD_DBG_MSG("sys rsp: 0x%02X", p_cmd_rsp_packet->evt.evtcode);
+          TL_SHCI_CMD_DBG_MSG(" cmd opcode: 0x%02X", ((TL_CcEvt_t*)(p_cmd_rsp_packet->evt.payload))->cmdcode);
+          TL_SHCI_CMD_DBG_MSG(" status: 0x%02X", ((TL_CcEvt_t*)(p_cmd_rsp_packet->evt.payload))->payload[0]);
+          if((p_cmd_rsp_packet->evt.plen-4) != 0)
           {
             TL_SHCI_CMD_DBG_MSG(" payload:");
-            TL_SHCI_CMD_DBG_BUF(&((TL_CcEvt_t*)(p_evt_packet->evtserial.evt.payload))->payload[1], p_evt_packet->evtserial.evt.plen-4, "");
+            TL_SHCI_CMD_DBG_BUF(&((TL_CcEvt_t*)(p_cmd_rsp_packet->evt.payload))->payload[1], p_cmd_rsp_packet->evt.plen-4, "");
           }
           break;
 
         default:
-          TL_SHCI_CMD_DBG_MSG("unknown sys rsp received: %02X", p_evt_packet->evtserial.evt.evtcode);
+          TL_SHCI_CMD_DBG_MSG("unknown sys rsp received: %02X", p_cmd_rsp_packet->evt.evtcode);
           break;
       }
 
       TL_SHCI_CMD_DBG_MSG("\r\n");
 
-      TL_SHCI_CMD_DBG_RAW(&p_evt_packet->evtserial, p_evt_packet->evtserial.evt.plen+TL_EVT_HDR_SIZE);
+      TL_SHCI_CMD_DBG_RAW(&p_cmd_rsp_packet->evt, p_cmd_rsp_packet->evt.plen+TL_EVT_HDR_SIZE);
       break;
 
     case  TL_MB_SYS_ASYNCH_EVT: