The Design And Implementation Of The APP Called Hhu Based On DLMS/CSOEM Protocol

With the rapid development of the smart grid and the wide application of the AMI solution,the power market has become more prosperous.The company Huawei has invented the data concentrator DCU and major manufacturers such as CLOU and WISDOM have continuously produced their own smart meters,which requires the smart handheld terminals to adapt to these changeable power devices.Thus the situation that smart handheld terminals only support one manufacturer even one meter model has broken.At the same time,the smart handheld terminals are designed as app called HHU,which removes the limitation that smart handheld terminals can only be customized.What's more,HHU can be interacted with the master station to achieve data integrity.HHU realizes the interaction with the devices.HHU can read data from the devices,modify parameters of the devices and operate the devices.HHU is divided into 9 modules according to functions,such as D2XX-Driver-Module,Connection-Control-Module and so on.HHU calls FTDI's D2XX Driver program to transmit messages to the devices via the USB port and the infrared optoelectronic head.The protocol adopts the international DLMS/COSEM that is currently popular in the energy field.Of course,this is also because the devices inside adopt the DLMS/COSEM.HHU adopts the architecture called MVP that is more suitable for development than the MVC architecture.In order to exchange data with the devices,HHU takes advantage of XML files that are easier to modify and implement.At first,this thesis introduces the background and describes the main work.Then the thesis introduces the technology used in project.Next,the requirements including functional requirements and non-functional requirements of the project are analyzed.Then the Overall-Design,Detailed-Design,and Data-Storage-Design are performed.The Overall-Design introduces the MVP architecture and the modules.The Detail-Design gives specific solutions on the modules.The Data-Storage-Design gives two ways including XML and database.After that,the GUI is shown and the implementation details of the modules are explained.Finally,the project is summarized and further prospects are proposed.