diff --git a/doc/comtool-plugin-hsjl.py b/doc/comtool-plugin-hsjl.py
index 2a313fd..b66cf04 100644
--- a/doc/comtool-plugin-hsjl.py
+++ b/doc/comtool-plugin-hsjl.py
@@ -39,10 +39,10 @@ class Plugin(Plugin_Base):
                     "data": "5A 54 E1 EE 00 CF 02 5A FE"
                 },
                 {
-                    "caption": "数据发送测试 - 40 Byte",
+                    "caption": "数据发送测试（节点01）",
                     "icon": "fa5.play-circle",
                     "data": (
-                        "5A 54 E4 EE 00 00 00 00 02 00 28 "
+                        "5A 54 E4 EE 01 00 00 00 01 28 00 "
                         "00 01 02 03 04 05 06 07 "
                         "08 09 0A 0B 0C 0D 0E 0F "
                         "10 11 12 13 14 15 16 17 "
@@ -51,11 +51,32 @@ class Plugin(Plugin_Base):
                         "00 08 31 5A FE"
                     )
                 },
-                # {
-                #     "caption": "数据发送测试 - 2",
-                #     "icon": "fa5.play-circle",
-                #     "data": ""
-                # },
+                {
+                    "caption": "数据发送测试（节点02）",
+                    "icon": "fa5.play-circle",
+                    "data": (
+                        "5A 54 E4 EE 02 00 00 00 02 28 00 "
+                        "00 01 02 03 04 05 06 07 "
+                        "08 09 0A 0B 0C 0D 0E 0F "
+                        "10 11 12 13 14 15 16 17 "
+                        "18 19 1A 1B 1C 1D 1E 1F "
+                        "20 21 22 23 24 25 26 27 "
+                        "00 0A 31 5A FE"
+                    )
+                },
+                {
+                    "caption": "数据发送测试（节点03）",
+                    "icon": "fa5.play-circle",
+                    "data": (
+                        "5A 54 E4 EE 03 00 00 00 03 28 00 "
+                        "00 01 02 03 04 05 06 07 "
+                        "08 09 0A 0B 0C 0D 0E 0F "
+                        "10 11 12 13 14 15 16 17 "
+                        "18 19 1A 1B 1C 1D 1E 1F "
+                        "20 21 22 23 24 25 26 27 "
+                        "00 0C 31 5A FE"
+                    )
+                },
                 {
                     "caption": "装订 - 【主 - 0x01】128 kbps，时隙表 0",
                     "icon": "fa5.play-circle",
diff --git a/src/systembus/systembus.c b/src/systembus/systembus.c
index 103d099..d5130f5 100644
--- a/src/systembus/systembus.c
+++ b/src/systembus/systembus.c
@@ -762,24 +762,27 @@ int32_t SysMonitor_Init(SYSMON_CONFIG *config)
 	}
 
 	memcpy(&(sysMonitorInst->config), config, sizeof(SYSMON_CONFIG));
-	sysMonitorInst->sendQueue[1] = NULL;
-	sysMonitorInst->recvQueue[1] = NULL;
 	memset(&(sysMonitorInst->sysInfoCtrl), BUFF_NONE, sizeof(PINGPONG));
 	memset(&(sysMonitorInst->linkLogCtrl), BUFF_NONE, sizeof(PINGPONG));
 	memset(&(sysMonitorInst->phyLogCtrl), BUFF_NONE, sizeof(PINGPONG));
 	memset(&(sysMonitorInst->hwStateCtrl), BUFF_NONE, sizeof(PINGPONG));
 
-	if (CircQueueCreate(&(sysMonitorInst->sendQueue),
-			sysMonitorInst->config.sendQueueMax) == false)
+	for (uint8_t ii = 0; ii < L2_NET_SCALE; ii++)
 	{
-		SysMonitor_Destroy();
-		return ENOMEM;
-	}
-	if (CircQueueCreate(&(sysMonitorInst->recvQueue),
-			sysMonitorInst->config.recvQueueMax) == false)
-	{
-		SysMonitor_Destroy();
-		return ENOMEM;
+		sysMonitorInst->sendQueue[ii] = NULL;
+		sysMonitorInst->recvQueue[ii] = NULL;
+		if (CircQueueCreate(&(sysMonitorInst->sendQueue[ii]),
+				sysMonitorInst->config.sendQueueMax) == false)
+		{
+			SysMonitor_Destroy();
+			return ENOMEM;
+		}
+		if (CircQueueCreate(&(sysMonitorInst->recvQueue[ii]),
+				sysMonitorInst->config.recvQueueMax) == false)
+		{
+			SysMonitor_Destroy();
+			return ENOMEM;
+		}
 	}
 
 	return SUCCESS;
@@ -870,7 +873,8 @@ int32_t SysMonitor_UpdateSendPayload(SYSBUS_SVC_PLD *payload)
 		return ENOMEM;
 	}
 	memcpy(payloadCopy, payload, sizeof(SYSBUS_SVC_PLD));
-	if (CircQueuePush(sysMonitorInst->sendQueue[payload->nodeId], (void *)payloadCopy) == false)
+	// valid id starts from 0x01
+	if (CircQueuePush(sysMonitorInst->sendQueue[payload->nodeId-1], (void *)payloadCopy) == false)
 	{
 		DBG_WARNING("SystemMonitor::SEND Queue overflowed!\n");
 		free(payloadCopy);
@@ -890,7 +894,8 @@ void SysMonitor_GetSendPayload(SYSBUS_SVC_PLD **payload, uint8_t dstId)
 	ASSERT(sysMonitorInst != NULL);
 	ASSERT(payload != NULL);
 
-	if (CircQueuePop(sysMonitorInst->sendQueue[dstId], (void **)payload) == false)
+	// valid id starts from 0x01
+	if (CircQueuePop(sysMonitorInst->sendQueue[dstId-1], (void **)payload) == false)
 	{
 		*payload = NULL;
 		DBG_INFO("SystemMonitor::Empty sendQueue, nothing need sent.\n");
@@ -904,8 +909,7 @@ void SysMonitor_GetSendPayload(SYSBUS_SVC_PLD **payload, uint8_t dstId)
  */
 int32_t SysMonitor_GenRecvRsp(SYSBUS_SVC_PLD *payload)
 {
-	ASSERT(sysMonitorInst != NULL);
-	ASSERT(sysbusDescPtr != NULL);
+	ASSERT(payload != NULL);
 	int32_t Status;
 
 	if (payload->dataId == DATA_ID_NONE || payload->dataLen > SYSBUS_PLD_MAX)
diff --git a/src/systembus/systembus.h b/src/systembus/systembus.h
index c12dc10..5f11401 100644
--- a/src/systembus/systembus.h
+++ b/src/systembus/systembus.h
@@ -109,7 +109,7 @@ typedef struct
  * @struct SYSBUS_SVC_PLD
  * @brief Payload struct that holds the service payload
  */
-typedef struct
+typedef struct __attribute__((packed))
 {
 	uint32_t dataId;  ///< data identifier
 	uint8_t nodeId;   ///< destination ID for tx, source ID for rx