Browsing by Author "Salami, A. F"

Now showing 1 - 8 of 8
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    Design of a Bimodal Home Automation System using ESP8266 and ATMEGA328 Microcontroller
    (Published by Department of Computer Engineering, Universitas Sriwijaya (Indonesia), 2017-10) Zakariyya, O . S; Salami, A. F; Alabi, O. O; Usman, A. M
    Home automation systems are garnering increasing popularity and widespread use due to the relative ease of domestic management and comparatively high return on technology investment tied to its adoption. However, Nigeria and other emerging ICT economies are yet to fully actualize and maximize the inherent potential of these smart home technologies due to endemic challenges associated with poor infrastructure, erratic power supply and unreliable Internet connectivity. These challenges necessitate an innovative paradigmatic shift that could provide a pragmatic technological solution suitable to the context of Nigeria and other developing climes. For most smart home systems in this research context, the status quo is based on choosing whether the design would be for short- or long-range communication network. Short-range designs which are usually realized with Bluetooth technology suffer from limited range issues while poor connectivity, bandwidth and latency issues are some of the problems plaguing Wi-Fi-based long-range designs. Consequently, this research presents a hybrid adaptive architecture that combines desirable features of both short- and long-range modes. The proposed smart home system is based on using embedded systems which use mobile application to send messages to ESP8266 Wi-Fi module. Together with notifications received from the monitoring unit, these messages are parsed by Arduino's ATMEGA328 microcontroller from where instruction codes are sent for controlling the load by switching ON or OFF various relays connected to the load.
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    Design of a Bimodal Home Automation System using ESP8266 and ATMEGA328 Microcontroller.
    (Department of Computer Engineering, Universitas Sriwijaya, Indonesia, 2017) Zakariyya, O. S; Salami, A. F; Alabi, A. O; Usman, A. M
    Home automation systems are garnering increasing popularity and widespread use due to the relative ease of domestic management and comparatively high return on technology investment tied to its adoption. However, Nigeria and other emerging ICT economies are yet to fully actualize and maximize the inherent potential of these smart home technologies due to endemic challenges associated with poor infrastructure, erratic power supply and unreliable Internet connectivity. These challenges necessitate an innovative paradigmatic shift that could provide a pragmatic technological solution suitable to the context of Nigeria and other developing climes. For most smart home systems in this research context, the status quo is based on choosing whether the design would be for short- or long-range communication network. Short-range designs which are usually realized with Bluetooth technology suffer from limited range issues while poor connectivity, bandwidth and latency issues are some of the problems plaguing Wi-Fi-based long-range designs. Consequently, this research presents a hybrid adaptive architecture that combines desirable features of both short- and long-range modes. The proposed smart home system is based on using embedded systems which use mobile application to send messages to ESP8266 Wi-Fi module. Together with notifications received from the monitoring unit, these messages are parsed by Arduino's ATMEGA328 microcontroller from where instruction codes are sent for controlling the load by switching ON or OFF various relays connected to the load.
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    Design of a Low-Cost Controller for Smart Prepaid Meters
    (Published by Department of Electrical Engineering, Ahmadu Bello University Zaria, 2020-09-25) Zakariyya, O . S; Olayanju, S. A; Abara, I. E; Salami, A. F; Sadiq, B. O; Alao, R. A
    This paper presents the design and implementation of a low-cost, low-complexity, energy-efficient controller with remote recharge and load shedding capability. The system is recharged remotely by an SMS sent to a registered SIM card in a GSM module, a voltage and current sensor measures the load power usage, a microcontroller is used to keep track of the power consumption and signals the relay in order to execute the load shedding when the predetermined threshold is reached. The whole system is powered by a power supply unit which converts the 220V AC from the supply mains to a 5V DC. After the design and upon testing, the energy measurement circuit worked with minimal error, the relay switch executed the load shedding function without delay, the GSM showed good network reception and the operation of the system was cheap and simple thus satisfying the objective of the research.
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    Dual Band Fractal Antenna Design for Wireless Application
    (Published by Department of Computer Engineering, Universitas Sriwijaya (Indonesia), 2016-10) Zakariyya, O . S; Sadiq, B. O; Olaniyan, A. A; Salami, A. F
    The objective of this paper was to design and analyse a dual wide band compact antenna for wireless application. Microstrip patch antenna limitation can be overcome by using fractal geometry. The proposed antenna was designed with a radius of 15mm on a FR4 lossy substrate with relative permittivity of 4.4 and loss factor of 0.025. Measurement result showed that the antenna has a dual band of operation with bandwidth for return loss below -10dB of 1.84GHz (2.2GHz-4.07GHz) and 2GHz (6GHz-8GHz) which can be applied to wireless local area network (WLAN) and Ultra wide band applications.
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    A High Gain Patch Antenna Array for 5g Communication
    (published by IEEE Xplore, 2019-10-17) Zakariyya, O . S; Sadiq, B. O; Adebayo, M. A; Salami, A. F; Usman, A. M; Afolayan, M. A
    This research proposed a 1X4 patch antenna array for 5G Communication. The proposed antenna was designed to resonate at 28GHz frequency band. CST Microwave studio was used for the simulation of the antenna by employing Roger RT 5880 LZ with thickness and permittivity 0.762mm and 1.96 respectively as the substrate. The antenna was fed using a quarter-wave transformer to match its impedance to 50 ohms. The single patch resonates at 27.9GHz frequency with; a bandwidth of 1.87GHz, and a gain of 7.79dB. The addition of another element brought about an increment in the above-mentioned values. Furthermore, the implementation of the four element array configuration brought about the significant enhancement of values for bandwidth and antenna gain with maximum achievable gain of 13.5 dB. The design procedure, structure and simulation of the antenna are discussed in this paper.
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    A High Gain Patch Antenna Array for 5G Communication.
    (Institute of Electrical and Electronics Engineers (IEEE)., 2019-10) Zakariyya, O. S; Sadiq, B. O; Adebayo, M. A; Salami, A. F; Usman, A. M; Afolayan, M. A
    This research proposed a 1X4 patch antenna array for 5G Communication. The proposed antenna was designed to resonate at 28GHz frequency band. CST Microwave studio was used for the simulation of the antenna by employing Roger RT 5880 LZ with thickness and permittivity 0.762mm and 1.96 respectively as the substrate. The antenna was fed using a quarter-wave transformer to match its impedance to 50 ohms. The single patch resonates at 27.9GHz frequency with; a bandwidth of 1.87GHz, and a gain of 7.79dB. The addition of another element brought about an increment in the above-mentioned values. Furthermore, the implementation of the four element array configuration brought about the significant enhancement of values for bandwidth and antenna gain with maximum achievable gain of 13.5 dB. The design procedure, structure and simulation of the antenna are discussed in this paper.
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    Modified Edge Fed Sierpinski Carpet Miniaturized Microstrip Patch Antenna
    (Published by Faculty of Engineering, University of Nigeria, Nsukka, (UNN) Nigeria, 2016-07) Zakariyya, O . S; Sadiq, B. O; Abdulrahman, O . A; Salami, A. F
    This paper presented a modified edge fed Sierpinski carpet microstrip patch antenna for antenna miniaturization.The proposed design was etched as Sierpinski carpet to lower the antenna resonant frequency, which is used to reduce the conventional patch antenna size. After the Sierpinski carpet second iteration, the proposed antenna was modified by replacing the rectangular slot in the middle of the patch with a circular slot. Simulation results showed that the proposed antenna achieved 46.5% size reduction when compared with the main patch antenna without affecting the resonant frequency and radiation patterns.
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    On the Accuracy of Edge Detectors in Number Plate Extraction
    (Published by Vilnius University and University of Latvia, 2019) Sadiq, B. O; Ochia, E. O; Zakariyya, O . S; Salami, A. F
    Edge detection as a pre-processing stage is a fundamental and important aspect of the number plate extraction system. This is due to the fact that the identification of a particular vehicle is achievable using the number plate because each number plate is unique to a vehicle. As such, the characters of a number plate system that differ in lines and shapes can be extracted using the principle of edge detection. This paper presents a method of number plate extraction using edge detection technique. Edges in number plates are identified with changes in the intensity of pixel values. Therefore, these edges are identified using a single based pixel or collection of pixel-based approach. The efficiency of these approaches of edge detection algorithms in number plate extraction in both noisy and clean environment are experimented. Experimental results are achieved in MATLAB 2017b using the Pratt Figure of Merit (PFOM) as a performance metric