The Smart Home system empowers you to remotely sense and control your home
The smart home system collects the environmental variables from the surrounding environment and, after analysis, can control relevant servos and relays to change it for the better.
The figure on the left shows that the core hardware component, PCB WB-340, currently testing in version 1.1, can be also used in warehouse management for logistics and storage application. My tutor, Professor Peng, would like to call it a data collection box. The more I work on this data collection box, the more versatile and flexible I discover an embedded application can be.
The figure on the left shows that the core hardware component, PCB WB-340, currently testing in version 1.1, can be also used in warehouse management for logistics and storage application. My tutor, Professor Peng, would like to call it a data collection box. The more I work on this data collection box, the more versatile and flexible I discover an embedded application can be.
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The primary goal
of this project is build up a networked system which facilitates information
flow and real-time feedback, particularly in the application of smart home. The
specific requirement originates from the vast booming of economy in China and
other developing countries, together with the growing demand for a better and
more convenience accommodation. The system can be also configured to fit into applications
like warehouses, distribution centers and hospitals.
Incorporating the common and easily employed technology in networking and communication enables the system to work organically and efficiently as a whole.
To realize this, proper hardware were selected once the mainframe of the system architecture is settled. Emphasis has been on the reliability of the data transfer and system response. Both hardware and software support is provided to reach this goal. On hardware level, RS-485, which transmits and receives on a half-duplex and in the twin twisted-pair wire is immune to external interference since the its signals are differential and do not need a ground wire. PCB layout is performed in a way that each of the communication modules is relatively independent and protected by largely spanned ground plane. There are also other alternate solutions of data communication such as CAN bus and Ethernet. The RS-232 interface can also be configured to manipulate a GPRS module so that in advanced application, any change occurring at home that is detected by dedicated sensors can be reported to the owner’s cellphone in almost no time. In addition, RS-232 interfaced zigbee modules are also obtainable at reasonable price and can work at remarkable stability. In the current system on experimental stage, these methods are explored to test the versatility of the system. On software level, a state machine is employed so that the whole system can work in clear order of fashion. The state machine is carefully designed so that its changing will facilitate the function of the system. In particular states, certain data transmit and receive are performed, which implement transmission protocol designed for this application to avoid packet loss or ill-interpreted data.
This system built here comes in the prototype, i.e. a small model resembling a house with different compartments representing actual separate rooms. Through control of difference rooms, the central data collection unit can display situation in every room real-time and control them if necessary.
Incorporating the common and easily employed technology in networking and communication enables the system to work organically and efficiently as a whole.
To realize this, proper hardware were selected once the mainframe of the system architecture is settled. Emphasis has been on the reliability of the data transfer and system response. Both hardware and software support is provided to reach this goal. On hardware level, RS-485, which transmits and receives on a half-duplex and in the twin twisted-pair wire is immune to external interference since the its signals are differential and do not need a ground wire. PCB layout is performed in a way that each of the communication modules is relatively independent and protected by largely spanned ground plane. There are also other alternate solutions of data communication such as CAN bus and Ethernet. The RS-232 interface can also be configured to manipulate a GPRS module so that in advanced application, any change occurring at home that is detected by dedicated sensors can be reported to the owner’s cellphone in almost no time. In addition, RS-232 interfaced zigbee modules are also obtainable at reasonable price and can work at remarkable stability. In the current system on experimental stage, these methods are explored to test the versatility of the system. On software level, a state machine is employed so that the whole system can work in clear order of fashion. The state machine is carefully designed so that its changing will facilitate the function of the system. In particular states, certain data transmit and receive are performed, which implement transmission protocol designed for this application to avoid packet loss or ill-interpreted data.
This system built here comes in the prototype, i.e. a small model resembling a house with different compartments representing actual separate rooms. Through control of difference rooms, the central data collection unit can display situation in every room real-time and control them if necessary.