diff --git a/df_datalink_sp/src/networking/link_layer/service.c b/df_datalink_sp/src/networking/link_layer/service.c
index 297105f..ae76f30 100644
--- a/df_datalink_sp/src/networking/link_layer/service.c
+++ b/df_datalink_sp/src/networking/link_layer/service.c
@@ -112,18 +112,29 @@ static int32_t Service_Packing(L2_INST *instPtr, L2_FRAME_TYPE type, uint8_t dst
 		L2_FrameInsertChunk(buff, L2_MSG_SVC_SRC_SPEEDY, L2_MSG_SVC_SRC_SPEEDY_LEN, &(instPtr->sysInfo.vY));
 		L2_FrameInsertChunk(buff, L2_MSG_SVC_SRC_SPEEDZ, L2_MSG_SVC_SRC_SPEEDZ_LEN, &(instPtr->sysInfo.vZ));
 
-		// packing payload
-		L2_FrameInsertChunk(buff, L2_MSG_SVC_PAYLOAD, L2_MSG_SVC_PAYLOAD_LEN, testData);
-
+		// uint32_t dataId;
 		// if(L2_GetNodeType(instPtr) == L2_NODE_HEAD) 
 		// {
-		// 	SysMonitor_GetSendPayloadLJRaw(buff+L2_MSG_SVC_PAYLOAD);
+		// 	SysMonitor_GetSendPayloadFLJRaw(buff+L2_MSG_SVC_PAYLOAD, &dataId);
 		// }
 		// else
 		// {
-		// 	SysMonitor_GetSendPayloadFLJRaw(buff+L2_MSG_SVC_PAYLOAD);
+		// 	SysMonitor_GetSendPayloadLJRaw(buff+L2_MSG_SVC_PAYLOAD, &dataId);
 		// }
 
+		// L2_FrameInsertChunk(buff, L2_MSG_SVC_PAYLOAD_ID, L2_MSG_SVC_PAYLOAD_ID_LEN, &dataId);
+		// if (dataId == DATA_ID_NONE) 
+		// {
+		// 	L2_FrameInsertChunk(buff, L2_MSG_SVC_PAYLOAD, L2_MSG_SVC_PAYLOAD_LEN, testData);
+		// }
+
+		// packing payload
+		uint32_t dataId;
+		dataId = DATA_ID_NONE;
+		L2_FrameInsertChunk(buff, L2_MSG_SVC_PAYLOAD_ID, L2_MSG_SVC_PAYLOAD_ID_LEN, &dataId);
+		L2_FrameInsertChunk(buff, L2_MSG_SVC_PAYLOAD, L2_MSG_SVC_PAYLOAD_LEN, testData);
+
+
 		Status = L2_CrcAppend(buff, L2_SVC_PACK_LEN - L2_MSG_SVC_CRC_LEN, L2_MSG_SVC_CRC, L2_CRC16_1021);
 		if (Status != SUCCESS)
 		{
@@ -258,14 +269,21 @@ int32_t L2_Service_PktHandler(L2_INST *instPtr, uint8_t *msg)
 		// Reset node ttl
 		node->ttlCnt = 0;
 
-		if(L2_GetNodeType(instPtr) == L2_NODE_HEAD) 
+		uint32_t dataId;
+		L2_FrameGetChunk(msg, L2_MSG_SVC_PAYLOAD_ID, L2_MSG_SVC_PAYLOAD_ID_LEN, &dataId);
+
+		if(dataId != DATA_ID_NONE)
 		{
-			SysMonitor_UpdateRecvPayloadLJRaw(msg+L2_MSG_SVC_PAYLOAD);
-		}
-		else
-		{
-			SysMonitor_UpdateRecvPayloadFLJRaw(msg+L2_MSG_SVC_PAYLOAD);
+			if(L2_GetNodeType(instPtr) == L2_NODE_HEAD) 
+			{
+				SysMonitor_UpdateRecvPayloadFLJRaw(msg+L2_MSG_SVC_PAYLOAD);
+			}
+			else
+			{
+				SysMonitor_UpdateRecvPayloadLJRaw(msg+L2_MSG_SVC_PAYLOAD);
+			}
 		}
+		
 #ifdef DATALINK_ENABLE_AUTOTIMESYNC
 		// Implement a auto time sync.
 		if (L2_GetNodeType(instPtr) != L2_NODE_HEAD) 
diff --git a/df_datalink_sp/src/systembus/systembus.c b/df_datalink_sp/src/systembus/systembus.c
index 0236a2c..d7819fd 100644
--- a/df_datalink_sp/src/systembus/systembus.c
+++ b/df_datalink_sp/src/systembus/systembus.c
@@ -443,7 +443,12 @@ int32_t SystemBus_HandleCmd(SYSBUS *instPtr)
 		sysbusRsp->len = FLJ_POLL_RESP_LEN;
 		sysbusRsp->data[WD_CMD] = WD_FLJ_POLL;
 		sysbusRsp->data[WD_PRD] = MY_PRD_ID;
-		SysMonitor_GetRecvPayloadFLJRaw(sysbusRsp->data + FLJ_DATA_OFFSET); // omit control info
+		uint32_t dataId;
+		SysMonitor_GetRecvPayloadFLJRaw(sysbusRsp->data + FLJ_DATA_OFFSET, &dataId); // omit control info
+		if (dataId == DATA_ID_NONE) 
+		{
+			memset(sysbusRsp->data + FLJ_DATA_OFFSET, 0xAA, PAYLOAD_FLJ);
+		}
 		if (CircQueuePush(instPtr->txQueue, (void *)sysbusRsp) == false)
 		{
 			free(sysbusRsp);
@@ -471,7 +476,12 @@ int32_t SystemBus_HandleCmd(SYSBUS *instPtr)
 		sysbusRsp->len = LJ_POLL_RESP_LEN;
 		sysbusRsp->data[WD_CMD] = WD_LJ_POLL;
 		sysbusRsp->data[WD_PRD] = MY_PRD_ID;
-		SysMonitor_GetRecvPayloadLJRaw(sysbusRsp->data + 2); // omit control info
+		uint32_t dataId;
+		SysMonitor_GetRecvPayloadLJRaw(sysbusRsp->data + LJ_DATA_OFFSET, &dataId); // omit control info
+		if (dataId == DATA_ID_NONE) 
+		{
+			memset(sysbusRsp->data + LJ_DATA_OFFSET, 0xAA, PAYLOAD_LJ);
+		}
 		if (CircQueuePush(instPtr->txQueue, (void *)sysbusRsp) == false)
 		{
 			free(sysbusRsp);