jDLMS is a Java implementation of the DLMS/COSEM protocol. It can be used to develop individual DLMS/COSEM client/master and. based communication while DLMS is a binary protocol. This document provides overview of COSEM modeling of metering devices, addressing and DLMS. The open smart grid platform supports DLMS/COSEM (IEC ]. DLMS/ COSEM is a popular protocol to read smart meters. DLMS/COSEM is the de facto .
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The distribution contains a fully functional gradle build file build.
jDLMS User Guide – DLMS/COSEM – OpenMUC
The authentication mechanism is the mechanism by which client and server authenticate each other during connection build up.
If no sign-off message is sent, the meter automatically signs off after a previously negotiated time interval after the last message. Lowest Level Security 0 No authentication is used.
You may want to take a look at the source code of the ConsoleClient or the ConsoleServer which is part of the distribution. Then both use cryptographic algorithms on these challenge strings and send the result back.
Any real world thing mapped to an appropriate class type can be described by the attributes defined in the standard; and the methods defined therewith allow operations to be performed on the attributes. The annotation processor can be applied using the following gradle protoocl script. It is one part of the identification of the object. The dedicated key is then used instead of the global encryption key for the remaining communication of this connection.
A library for ASN. During sign-on, the handheld unit addresses a particular meter by number. You must accept the license to download this software.
Command Line Application A command line application is part of the library that can be used to connect, read, write and scan DLMS devices. Until recently only one encryption mechanism also called security suite existed. The protocol is usually half-duplex. Executing the script without any parameters will print help information to the screen. Each logical device has an address protoccol the range [0, ].

If the parameter required is in low security group, a password authentication of the HHU is cksem before information can be read. Thus if you changed code and want to rebuild a library you can do it easily with Gradle. Dedicated encryption key A temporary session key that can optionally be used instead of the global encryption key by encryption mechanisms. Server Address The server address consists of the physical address and the address of the logical device.
Defines the abstract of physical data items, related to the information source e. Attributes and methods can be addressed in two ways: D Defines types, or the result of the processing of physical quantities identified with ;rotocol value cosm A and Caccording to various specific algorithms e. In addition each object has 2 byte short name that maps to the logical name.
The cryptographic algorith used for authentication depends on the HLS level: These selective access parameters are defined as part of the attribute specification.
List of International Electrotechnical Commission standards. In this case both client and server are authenticated. A logical name is actually an OBIS code. As an example, a meter could consist of one logical device for electricity metering at address 18 and another one for a connected gas meter at address The two mechanisms often use the same keys but they can be chosen independently of each other and can be used in any combination.
In case of high security parameters,the meter challenges the hand held unit with a cosemm password. The logical device address is sometimes called server wPort or server SAP.
Only bytes C and D are mandatory. After signing on, the hand held unit generally reads a meter description.
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The Blue book describes the COSEM meter object model and the OBIS object identification system, the Green book describes the Architecture and Protocols, the Yellow book treats all the questions concerning conformance testing, the White book contains the glossary of terms. The cryptographic algorith used for authentication depends on the HLS level:.
The server address consists of the physical address and the address of the logical device.
Next the meter informs the hand held unit about the various parameters that are available with it in various security settings viz. The following authentication mechanisms also called protofol levels exist:. C Defines the abstract of physical data items, related to the information source e.
The entity accessing the meter is called the client or master respectively. You can execute it using the jdlms-console-client script found in the folder run-scripts. Please contact us for an individual license agreement if the license terms shown below are not suitable for you.
The six bytes have the following meaning:. May be set to 0xFF where this is irrelevant. This page was last edited on 24 Januaryat Master key The master key is used for wrapping global keys.
F Defines the storage of the data, identified by A to E e.
