LIFI COMMUNICATION SYSTEM USING KEYPAD

Over the years, the overdependence on Wireless Fidelity (Wi-Fi) for data transmission necessitated the need for an alternate and more reliable means of communication, hence, Light Fidelity (Li-Fi). It involves the use of Light Emitting Diode to transmit data by blinking (i.e. switching them on and off) at a speed not noticeable to the eye. This paper proposed the development of the Li-Fi system using off the shelf electronic components. This would make the system an indispensable means of communication in the nearest future. This data transmission system is different from those in existence because expensive components were not in the design, invariably reducing the overall cost of the implementation. Keywords: Light Fidelity (Li-Fi), Wireless Fidelity (Wi-Fi) Optical communication, Telecommunication

Potential Using Vehicle to Vehicle Communication Based on Wireless Fidelity (Wi-Fi) for Supporting Intelligent Transportation Systems (ITS)

Vehicular Ad-hoc Network (VANET) becomes one of the most popular modern technologies these days, due to its contribution to the development and modernization of Intelligent Transportation Systems (ITS). The primary goal of these networks is to provide safety and comfort for drivers and passengers in roads. There are many types of VANET that are used in ITS, in this paper, we particularly focus on the Vehicle to Vehicle communication (V2V), which each vehicle can exchange information to inform drivers of other vehicles about the current state of the road flow, in the event of any emergency to avoid accidents, and reduce congestion on roads. We proposed V2V using Wi-Fi (wireless fidelity); the reason of its unique characteristics that distinguish it from other types. There are many difficulties and the challenges in implementing most types of V2V, and the reason is due to the lack of devices and equipment needed for real implementation. To prove the possibility of applying this type in real life, we made a prototype contains a modified toy car, a 12-volt power supply, sensors, visual, audible alarm, a visual “LED” devices, and finally a 12-volt DC relay unit. As a conclusion, the proposed implementation in spite of minimal requirements and use simple equipment, we have achieved the most important main objectives of the paper: preventing vehicles from collision, early warning, and avoiding congestion on the roads.

Perancangan Program Pengajuan Pemasangan Wifi Publik Kota Depok Berbasis Web

Wireless Fidelity (Wifi) merupakan salah satu bentuk perkembangan dari teknologi koneksi tanpa kabel dengan menggunakan gelombang radio. Penggunaan Wifi sekarang ini sudah sangat lazim kita jumpai dimana-mana baik itu ruang publik seperti taman sampai ruang privat seperti rumah dan kantor. Salah satu keunggulan menggunakan jaringan Wifi adalah satu titik Hotspot (Wifi) bisa digunakan oleh beberapa perangkat device berbeda. Karena kepraktisan inilah banyak dari masyarakat sekarang yang menggunakan Wifi untuk berkegiatan sehari-hari seperti membaca berita, membuka social media, sampai keperluan pekerjaan dan pendidikan. Namun didapati bahwa masih banyak masyarakat yang belum bisa menikmati fasilitas Wifi ini dikarenakan setiap pemasangan titik Hotspot (Wifi) diperlukan biaya yang tidak murah dan setiap bulannya memerlukan biaya berlangganan. Untuk hal tersebut, perancangan program pengajuan wifi publik kota Depok dibuat dengan tujuan agar mempermudah masyarakat dalam mengajukan pemasangan Wifi karena bisa dilakukan secara online serta dengan tujuan lainnya yaitu agar masyarakat khususnya kota Depok dapat mengetahui mengenai informasi terkait lokasi yang sudah tersedia Wifi. Metode penelitian yang digunakan dengan metode waterfall dengan model pengembangan SDLC. Pengumpulan data dilakukan dengan wawancara, survey dan observasi. Alat Bantu analisis menggunakan Entity Relationship Diagram dan Logical Record Structure (LRS). Diharapkan dengan adanya aplikasi ini masyarakat khususnya warga Depok dapat dengan mudah mendapatkan pelayanan Wifi gratis antara lain untuk tempat-tempat seperti taman, balai warga, posyandu, tempat ibadah, kantor Rukun Warga, dan lain-lainnya dengan cara pemasangan wifi gratis pada area-area tersebut.

WiFi Signal Strength Degradation Over Different Building Materials

Wireless Fidelity (WiFi) signals experience propagation through air and material in a building. This propagation causes signal decreasing signal strength. This study aims to determine materials in buildings that cause significant signal strength loss so in the future building design could factor in signal strength by using material that doesn't affect signal strength significantly. The testing of signal strength will be done by observing signal strength through different materials. Signal strength will be recorded by using a mobile app. Materials that majorly decrease signal strength are plastics, with the least affecting materials are hollow plywood wall. The use of plastics in a building affects significantly on signal loss and should be replaced if possible with hollow plywood walls.

Telecommunication Network Performances and Evaluation of Radio Frequency Electromagnetic Radiation

The ongoing mobile communication technology intensification had occasioned the inevitable multiplications in the ratio of the radio frequency base service stations which had raised public consciousness over the considerable health hazards of the radioactive emissions from the communication systems. The current paper analysed the sequences of electromagnetic field measurements performed on the selected three states in the North West Nigeria in order to establish the compliance of radiation levels of cellular base stations and wireless fidelity access points with respect to internationally approved recommendations. The measured power densities of wireless fidelity access points are minimal and do not surpass 1% of the level allowed by International Commission on Non-Ionizing Radiation (ICNIRP). The result confirmed the environmental safety of the RF energy maintained by the telecommunication operators within the general public indicating an insignificant health hazards to the citizens.

Frequency Allocation for Wireless Fidelity (Wi-Fi) System using FDMA

As a core technology enabling factor for the next generation, it is provided to benefit cellular modems, wireless fidelity (Wi-Fi), multi-user seamless access. Recommend a fiction in this paper, multiple access scheme based on frequency-domain referred to as the frequency division multiple access (FDMA). Our studies indicate that FDMA represents a considerable improvement in spectral efficiency. In two variables, roughly equivalent to ordinary multiple access schemes, the hardware and computational complexity were being questionably presented. FDMA is one of the multiple access scheming which deals with the frequency of the system. Frequency allocation in the system or between the system plays an important role while transmitting and receiving the large size bits. While transmitting or receiving the large size bits, frequency allocation must be needed. To transmit the large bits, the frequency allocation should also be large, so that without any noise or interference, the transmitter can send the bits in allocated frequency. Not only does the transmitter, transmit the large bits, the receiver also receives the large-sized bits in allocated frequency. So that, this paper introduces the FDMA technique in Wireless Fidelity (Wi-Fi).

Rekayasa Sistem Kendali Gripper melalui Robot Transporter menggunakan WiFi Module ESP8266

Tujuan penelitian ini terkait pada rancang bangun robot pemindah barang berbasis IoT (Internet of Things) yang mudah dan praktis. Dengan menggunakan WiFi (Wireless Fidelity) module, ESP8266, maka sistem robotik ini berfokus pada fungsi mesin lengan pengendali. Keseluruhan sistem kendali robot menggunakan media smartphone terkoneksi melalui jaringan wireless pada saluran seluler 3G atau 4G. Sistem ini merupakan solusi praktis bagaimana pengendali mobile robot berbasis Android ini dapat memiliki target jarak kendali yang jauh dan mudah untuk diaplikasikan. Metode penelitian ini yaitu merekayasa kendali gripper dengan lengan robot berfungsi transporter dengan kemampuan mengangkat, menjepit, menggeser atau memindahkan barang, sehingga barang tersebut dapat dipindahkan. Desain perancangan ini disertai dengan mikrokontroler sebagai pengelola perintah yang mengendalikan gripper dan motor servo sebagai penggerak utama aktuatornya. Hasil penelitian menunjukkan bahwa sistem uji lengan robot dapat berfungsi dengan baik, dimana robot dapat mengangkat beban maksimal 545,6 gram sesuai dengan rancangan yang telah dibuat. Jarak maksimal jangakuan pengontrolan perintah robot adalah 155 meter.

Smart Door Lock

Internet of Things (IoT) has become a phenomenon in many researchers. A smart digital automated system based on IoT plays major role which helps in reducing human work by applying interaction technology in daily life. This research introduces the IoT Smart Door Lock where smartphone uses Wireless Fidelity (Wi-Fi) to activate the door lock. By using Android software, the smartphone will automatically activate the door lock within a specific range. Data transmission will be done using Wi-Fi technology. So, the user does not have to worry whether the door has been locked or not because user can control it by using their smartphone within a specific range. The user also does not have to worry about losing the door key anymore because there is no device required except user’s smartphone. This project consists of hardware and software development. The main purpose on the design is to prevent the situation where the user is unable to unlock the door when the key is missing also to give a solution for users to monitor door status when they forget the door has been locked or not. This system aims to eliminate the use of keys to access the door, where the daily struggle faced to bring along a bunch of keys anywhere. Besides that, the door locking system must function efficiently. The prototype of this system is successfully done, the procedure and the software and hardware requirement has been compiled in this report.