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Apartment house automation - "Smart House" (HouseSpirit)

Name: "Smart House" (HouseSpirit) Start: 28 03(March) 2011 Finish: 12 06(June) 2011 Location: Khanty-Mansiysk city, Russia Performers: Oleg Sidashov, Roman Savochenko Description: Implementation of the apartment house automation project - "Smart House" (HouseSpirit).

Introduction

The object of automation is the house with equipment - the subject to automation. The system is designed to automate the actions performed by the user or service personnel to provide security, comfort, convenience at the automation object - the living room (apartment, private house), as well as at the surrounding area (land, yard, garden) .

The system is designed for the solution of following tasks:

• Access control of the automation object.
• Control of indoor climate.
• Lighting control at the automation object.
• Water network control at the automation object.
• Control of the household, electrical and multimedia appliances at the automation object.
• Providing the remote control, direct control (in the real time mode), scheduling control of the automation object.
• Detection and elimination of emergency situations.

Objectives of the creation of the system are:

• Improving the quality of human life at the automation object.
• Improving the safety of the automation object.
• Reduce the cost of living: reduced energy costs, costs for the use of water supply network.
• Reduce time and physical costs of the operations performed by the user on the object of automation.

1. Automation object

The area of the automation object - 300 m2. The air temperature in rooms intended for the server, sensors and actuators placement from 10 to 25 degrees Celsius. The air temperature outside the premises where the sensors and actuators are placed: from - 30 to 30 ° C.

The levels of pollution, humidity, light, noise and ionizing radiation correspond to sanitary and epidemiological requirements for residential buildings and premises (САНПИН 2.1.2.1002-00).

At the object there is electromagnetic radiation induced by the appliances, as well as by means of different equipment (Bluetooth, Wi-Fi, GSM).

The "Smart house. Control Server" system is a hardware-software module, which is the main control center of the automation object. The server receives and processes signals from various sensors, generates and transmits signals to control actuators, communicating with the user via GSM. Management of the system is made via the web interface.

The "Smart house. Control Server" system includes the following subsystems:

1. Access control subsystem.
2. Lighting control subsystem.
3. Climate control subsystem.
4. Water network control subsystem.
5. Household and multimedia devices control subsystem.
6. Subsystem of the processing the information from the sensors.
7. Subsystem for the providing the interaction with the user through the Web-interface and via GSM.
8. Authorization subsystem.
9. The reporting subsystem.
10. Configuration subsystem provides mechanisms to add, remove or edit information in the used database for the 1-8 subsystems.

The block diagram of the house automation system is shown in Figure 1.

Fig. 1. The block diagram of the house automation system

To control the various hardware of the house it was designed the hub and built the wireless network ZigBee of the devices for the equipment control. Overall equipment control, as well as providing the Web-based user interface and other methods of notification are made by the dedicated server of house automation. The hub if the ZigBee network is connected to the server through the RS-232 and ModBus/RTU protocol. Alarms in the automatics' control area will be sent to the user via SMS-notifications through the connected GSM-modem.

Wireless controller has the following specifications:

• The presence of the ZigBee transceiver;
• ZigBee protocol data rate of at least 200 kb/s;
• Availability of USB or COM - port to connect to the server;
• Power supply 220 V.

GSM-module has the following specifications (Siemens TC65):

• Support of GSM-900;
• Availability of USB or COM - port to connect to the server;
• Support of AT standard commands of the GSM 07.05 GSM 07.07;
• Power supply 220 V.

The hardware of the server:

• processor of x86_32 or x86_64 architecture (not less than Intel Core2Duo);
• 2GB DDR3 RAM;
• presence of at least three USB - ports.

As a software environment, to serve the house automation functions — "Smart House" an open SCADA system OpenSCADA is used, in the environment of which it is designed the Web-based user interface "Smart House", and implemented the interrogation and control of devices via ZigBee concentrator.

2. Automation system

OpenSCADA system has several ways of forming visualization user interfaces, stating from integrated development tools of standard interfaces of controls the various areas of automation and ending by the low-level mechanisms of libraries and interfaces of graphic concepts.

The integrated interfaces of OpenSCADA are:

• The "UI.VCAEngine" module — visualization engine to build a unified interfaces and presentations (final visualization) using different types of graphical interfaces, as well as with the ability to work as a server of visualization interface.
• The "UI.Vision" module — "UI.VCAEngine" visualizer and the GUI development interface based on the QT4 library.
• The "UI.WebVision" module — "UI.VCAEngine" visualizer based on the Web-interfaces: XHTML, XML, CSS, JavaScript, DOM and AJAX.

The low-level mechanisms of constructing the user interfaces include any other graphics libraries, which have a rapid development tools of the user interface. The co-operation with OpenSCADA is produced as with data source and with the interface of the unified control of the equipment under different protocols.

In order to provide the ability of user's Web-interfaces formation directly in the OpenSCADA, the module "UI.WebUser" module is provided. Overall, the OpenSCADA contains all the basic functions of a typical Web-server, as follows:

• Acception of the client connections over standard transport protocols: TCP, UDP, Unix, as well as over the protected connections SSL и TLS.
• Support of the basic HTTP protocol functions: GET and POST.
• Dynamic creation of user-generated content through an internal JavaScript (JavaLikeCalc) language in the form of the flows with the contents: HTML, XHTML, XML, CSS, JavaScript languages, images of different formats, etc.

Consequently, for the construction of any user control interface it is enough to have installed OpenSCADA system with the following modules: Transport.Sockets, Transport.SSL, Protocol.HTTP and UI.WebUser.

2.1. The structure and location of files

In order to reduce the load on the fully dynamic formation of the user interface, as well as to facilitate the future expansion and modification of style the Web-interface was divided into static and dynamic parts.

The static part consists of a set of template HTML-files with labels of the dynamics placement and resource files: CSS, JavaScript and images. In general, the static part is represented by files, which are described in the table below:

The dynamic part is implemented by the scripts in the internal language of OpenSCADA - JavaLikeCalc, which are described in the table below:

In general, the algorithm processing the requests to the pages is(on the example of http://localhost:10002/WebUser/temperature?script=devMon):

• request is received in the script /sub_UI/mod_WebUser/hs from the transport /sub_Transport/mod_Sockets/in_WEB_1, by means of the Protocol.HTTP protocol module;
• the template file is loaded temperature.html;
• the script of the "devMon" page is being looking for (/sub_DAQ/mod_JavaLikeCalc/lib_web/devMon). If the script argument is missing the script search is made by the name of the page (/sub_DAQ/mod_JavaLikeCalc/lib_web/temperature);
• the transfer of the page's template to the found script for the formation of dynamics is made;
• the result of the page's script execution is placed to the main template;
• if the page's script is not found, the page's template puts its contents directly into the main template.

2.2. Devices Manager

The Devices Manager is available only for root and builds the form (Fig. 2) for edit, and and remove devices of two types: binary and decimal.

Fig. 2. Devices Manager.

The created device are placed in the attributes list of the parameter of the specifically taken subsystem of "ZigBee" controller of the data source module "ModBus" (/sub_DAQ/mod_ModBus/cntr_ZegBee/). Recording format of an attribute is as follows:

• «R:0:r:cond:Airconditioning:bin:10:Enabled:0:Disabled:(120|100)» — for binary sensor:
  • R — ModBus register;
  • 0 — ModBus register address;
  • r — read only;
  • cond — ID of an attribute-senso;
  • Airconditioning — sensor's name;
  • bin — sensor's type - "Binary";
  • 10 — the first value;
  • Enabled — the name of the first value;
  • 0 — the second value;
  • Disabled — the name of the second value;
  • (120|100) — location coordinates ({x}|{y}) of the sensor in the scheme of premises.
• «R:3:rw:tGhost1:The temperature in the living room 1:dec:deg. С:y=2*x;:(120|100)» — for the decimal sensor:
  • rw — read only;
  • dec — sensor's type - "Decimal";
  • deg. C — unit of the variable;
  • y=2*x; — conversion formula for the received variable for display;
  • (120|100) — location coordinates ({x}|{y}) of the sensor in the scheme of premises.

In addition to direct sensors the configuration and formation of alarms is made in the form of text procedure. The program of formation is placed in the "var" attribute of the alarms controller parameter /sub_DAQ/mod_JavaLikeCalc/cntr_alarms/prm_rules. The "var" attribute contains the following XML tree:

According to the XML-tree the formation of alarms and sending SMS-notifications to the subscribed users is made in the controller's task /sub_DAQ/mod_JavaLikeCalc/cntr_alarms, which is executed with a period of 1 minute.

SMS-notifications are sent via the serial transport /sub_Transport/mod_Serial/out_GSM and through the user's SMS-protocol (/sub_Protocol/mod_UserProtocol/up_SMS).

You can also select the delayed giving of the control action. To do this, the user sets the right time, in the form of: {Min}:{Sec}. Processing of the delayed control is made in the controller /sub_DAQ/mod_JavaLikeCalc/cntr_timers by setting the "var" attribute of the "rules" parameter with the help of requests in the XML tree:

2.3. Subsystems

All visualization subsystems are served by the /sub_DAQ/mod_JavaLikeCalc/lib_web/devMon script. This script process the requests from the script of the dynamic visualization of Web-browser and receive the data on the subsystem's devices, required for visualization (Fig. 3). Data about the devices are transferred in accordance with the privileges of the logged user.

Fig. 3. Subsystem's management.

The configuration of sensors is read from the parameter corresponding to the "ZigBee" controller's subsystem (/sub_DAQ/mod_ModBus/cntr_ZegBee). The values are read and written to the attributes of the sensors of these parameters or through the controller or delayed management.

The task of the "ZigBee" controller is executed with the period of 1 second, in the process of which the request of the the current values of all configured sensors is made. Record of the the values is made on the fact of modification, regardless of the periodic polling task or through the delayed management controller in the case of installation of nonzero timer.

Connection to the "ZigBee" controller is made via serial outgoing transport /sub_Transport/mod_Serial/out_ZegBee.

2.4. Users manager

Users manager (Fig. 4) is intended to create, delete and edit accounts of ordinary users.

Fig. 4. Users manager.

Users are divided into administrators and ordinary users. Identification of the user as an administrator in the OpenSCADA system is made by turning it into the "WebRoot" group (/sub_Security/grp_WebRoot). An ordinary user is included into the "Web" group (/sub_Security/grp_Web).

In OpenSCADA system, each user (/sub_Security/usr_test1/) has a text description field, which in this case serves to store its special settings in the following way:

In the case of an administrator's account the records of an access rights to the subsystems are not available, but there are system-wide settings such as the lifetime of the session (/sub_Protocol/mod_HTTP).

2.5. Messages

The message list is formed based on the active list of alarms in their categories "ALARM:House:*" in tabular form, with the time, category, level and the alarm message (Fig. 5).

Fig. 5. Messages.

2.6. Reports

During the report's generating the time range is indicated and messages' types are select. The generation of message for the following types is provided:

• "System events" — includes messages about login and logout users on the resource by means of the massages category "/\/sub_Protocol\/mod_HTTP\//".
• "Monitoring and management subsystems' events" — includes alarms and record the new values of the sensors through the categories of messages «

The protocol is formed as a table (Fig. 6) with the time, category, level and message of the alarm, which is also recorded in the separate report file, later available on the link to the separate opening.

Fig. 6. Reports.

Links