diff --git a/misc/controller/vzlogger/src/sml.h b/misc/controller/vzlogger/src/sml.h
new file mode 100644
index 0000000..4234398
--- /dev/null
+++ b/misc/controller/vzlogger/src/sml.h
@@ -0,0 +1,121 @@
+/**
+ * libsml header
+ *
+ * based on SML, Smart Message Language specification
+ * Version 1.03 from 12. Nov 2008
+ *
+ * @package controller
+ * @copyright Copyright (c) 2010, The volkszaehler.org project
+ * @license http://www.gnu.org/licenses/gpl.txt GNU Public License
+ * @author Steffen Vogel <info@steffenvogel.de>
+ */
+/*
+ * This file is part of volkzaehler.org
+ *
+ * volkzaehler.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+ *
+ * volkzaehler.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with volkszaehler.org. If not, see <http://www.gnu.org/licenses/>.
+ */
+ 
+#ifndef _SML_H_
+#define _SML_H_
+
+typedef uint8_t SML_Unit; /* DLMS-Unit-List, lookup in IEC 62056-62 */
+typedef uint64_t SML_Status;
+typedef char * SML_Signature;
+
+struct SML_File {
+	uint8_t version; /* should be 1 (v2 is not supported atm) */
+	struct SML_Message * messages; /* linked list */
+	uint16_t crc16;
+}
+
+struct SML_Message {
+	char * transactionId;
+	uint8_t groupNo;
+	uint8_t abortOnError;
+	uint16_t crc16;
+	
+	uint32_t tag;
+	union { /* SML_MessageBody */
+		//struct SML_PublicOpen.Req * openRequest;			/* 0x00000100 */
+		struct SML_PublicOpen.Res * openResponse;			/* 0x00000101 */
+		//struct SML_PublicClose.Req * closeRequest;			/* 0x00000200 */
+		struct SML_PublicClose.Res * closeResponse;			/* 0x00000201 */
+		//struct SML_GetProfilePack.Req * getProfilePackRequest;	/* 0x00000300 */
+		//struct SML_GetProfilePack.Res * getProfilePackResponse;	/* 0x00000301 */
+		//struct SML_GetProfileList.Req * getProfileListRequest;	/* 0x00000400 */
+		//struct SML_GetProfileList.Res * getProfileListResponse;	/* 0x00000401 */
+		//struct SML_GetProcParameter.Req * getProcParameterRequest;	/* 0x00000500 */	/* not implemented yet! */
+		//struct SML_GetProcParameter.Res * getProcParameterResponse;	/* 0x00000501 */
+		//struct SML_SetProcParameter.Req * setProcParameterRequest;	/* 0x00000600 */
+		//struct SML_SetProcParameter.Res * setProcParameterResponse;	/* 0x00000601 */
+		//struct SML_GetList.Req * getListRequest;			/* 0x00000700 */
+		struct SML_GetList.Res * getListResponse;			/* 0x00000701 */
+		//struct SML_Attention.Res * attentionResponse;			/* 0x0000ff01 */
+	}
+	
+	SML_Message * next; /* NULL for end of list */
+}
+
+SML_Time {
+	uint8_t tag;
+	union { /* SML_Timestamp */
+		uint32_t secIndex; /* 0x01 */
+		uint32_t timestamp; /* 0x02 */
+	}
+}
+
+struct SML_PublicOpen.Res {
+	char * codepage; /* optional */
+	char * clientId; /* optional */
+	char * reqFileId;
+	char * serverId;
+	struct SML_Time refTime; /* optional */
+	uint8_t smlVersion; /* optional */
+}
+
+struct SML_PublicClose.Res {
+	SML_Signature globalSignature; /* optional */
+}
+
+struct SML_GetList.Res {
+	char * clientId; /* optional */
+	char * serverId;
+	char * listName; /* optional */
+	struct SML_Time actSensorTime; /* optional */
+	struct SML_List valList;
+	struct SML_Signature listSignature; /* optional */
+	struct SML_Time actGatewayTime; /* optional */
+}
+
+struct SML_List {
+	struct SML_ListEntry * valListEntry;
+	struct SML_ListEntry * next; /* NULL for end of list */
+}
+
+struct SML_ListEntry {
+	char * objName;
+	SML_Status status; /* optional */
+	struct SML_Time valTime; /* optional */
+	SML_Unit unit; /* optional */
+	uint8_t scaler; /* optional */
+	struct SML_Value value;
+	struct SML_Signature valueSignature; /* optional */
+}
+
+/* functions */
+struct SML_File SML_Parse(char * data);
+void SML_Free(struct SML_File * file);
+uint16_t SML_Crc16(char * data, size_t length);
+
+#endif /* _SML_H_ */