A Digitalized Smart Mobile Home Automation and Security System via Bluetooth/Wi-Fi Using Android Platform
Abdulkareem Quadri Bolaji,
Raji Ayodele Kamaldeen,
Oyedepo Femi Samson,
Abdulrahman Tosho Abdullahi,
Sadiq Kolawole Abubakar
Issue:
Volume 2, Issue 6, December 2017
Pages:
93-99
Received:
5 October 2017
Accepted:
30 October 2017
Published:
15 November 2017
Abstract: Home automation involves introducing a degree of automatic control to certain electrical and electronic systems in a building such as lighting, temperature control etc. This work presents the design, specification, and prototype implementation of a composite home automation system using Bluetooth/Wi-Fi over android platform. The research work provides multiple yet simple design approaches for developing flexible and robust home automation system to cater for the deficiency in overall control of user appliances. It also tackles the problems with complex, multiple, incompatible standards and the resulting expenses in the existing systems. The proposed system features an Arduino Mega board with core AVR microcontroller (ATmega2560) interfaced to the ubiquitous ESP8266 Wi-Fi chip, Infrared transmitter and receiver mechanism, power relay interface as well as user contact LCD and Keypad. With the HTML5 based intuitive mobile and web applications, unlimited flexibility is induced in the system operations and management. Overall, the system extends the capabilities of home automation beyond the basic appliances switching and monitoring by giving broad control over the appliances’ functionalities in addition to switching their power.
Abstract: Home automation involves introducing a degree of automatic control to certain electrical and electronic systems in a building such as lighting, temperature control etc. This work presents the design, specification, and prototype implementation of a composite home automation system using Bluetooth/Wi-Fi over android platform. The research work provi...
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Performance Analysis of Multi-code Keying Scheme for Spectral-Amplitude-Coding Optical CDMA Network
Issue:
Volume 2, Issue 6, December 2017
Pages:
100-103
Received:
1 October 2017
Accepted:
30 October 2017
Published:
25 November 2017
Abstract: Multi-code keying scheme is proposed for spectral-amplitude coding (SAC) optical code-division multiple-access (OCDMA) network, and in this scheme users are assigned several signature sequences for spectral efficiency enhancement. The shifted prime codes can be used in this scheme since their code patterns are suitable for the implementation of compact encoding/decoding structures based on arrayed-waveguide gratings. The performance analysis shows that the proposed multi-code keying scheme obtains better spectral efficiency than previous two-code keying when number of codewords for each user is greater than two.
Abstract: Multi-code keying scheme is proposed for spectral-amplitude coding (SAC) optical code-division multiple-access (OCDMA) network, and in this scheme users are assigned several signature sequences for spectral efficiency enhancement. The shifted prime codes can be used in this scheme since their code patterns are suitable for the implementation of com...
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Transmission Characteristics of High Frequency Signal in Low Voltage Power Lines
Xiao Chen,
Jie Fan,
Kaining Luan,
Yongxian Yi,
Faye Zhang
Issue:
Volume 2, Issue 6, December 2017
Pages:
104-109
Received:
18 October 2017
Accepted:
9 November 2017
Published:
5 December 2017
Abstract: Power line carrier communication using 1MHz ~ 30MHz as carrier signal can improve the bandwidth of data transmission. Using the high frequency signal as a carrier signal, with the increase of signal frequency, the attenuation range of low voltage power line channel is also increased. On the basis of the structure of low voltage power grid, the transmission attenuation model of high frequency signal in low voltage power line channel is established by using transmission line theory. The attenuation in different locations and loads is measured by experiments. Analytical results show that the attenuation of the signal increases with frequency in the 1~30MHz band. The attenuation of the signal is time varying to a certain extent. The attenuation of the signal is also impacted by the load. As the load increases, the attenuation of the signal increases.
Abstract: Power line carrier communication using 1MHz ~ 30MHz as carrier signal can improve the bandwidth of data transmission. Using the high frequency signal as a carrier signal, with the increase of signal frequency, the attenuation range of low voltage power line channel is also increased. On the basis of the structure of low voltage power grid, the tran...
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