One implementation of the Internet of Things (IoT) conducted in this study to realize the system of monitoring and control of electrical energy usage-based Wireless Sensor Network (WSN). This research method is the design of wireless sensor nodes that can measure the electrical parameters of alternating current (AC) as effective voltage, effective current, active power, apparent power, power factor and total electrical energy consumption by using modules ESP8266 as a liaison with a Wi-Fi. Calculation of electrical parameters obtained from ATmega328P microcontroller ADC readings of a step-down transformer that is used as a voltage sensor and sensor SCT013 used as AC current sensors will be transmitted to the server over the network from a Wi-Fi Access Point (AP). ESP8266 modules are programmed using AT-Command proven to reliably measure can transmit data simultaneously with serial data format of the wireless sensor node to a server using TCP / IP protocol. Monitoring power consumption via the internet which are designed in the research, either through the Android application and web browser proven to be reliably able to show some electrical parameters with the same data than the data logger recaps taken from SD-Card installed in the wireless sensor node.
In a process of learning, learning media play an important role in improving students’ understanding. In this study, a learning medium based on Internet of Thing (IoT) was developed. The IoT is one of core development in technology of Industrial Revolution 4.0 era. The learning media developed in this research study utilizing LoRa (Long Range Area) which functions as a remote data sender. The LoRa paired with Arduino connected to sensors and placed in several location within Banda Aceh. LoRa was integrated with Network Thing to store data and could be displayed on the PC. The researchers and students could observe the changes in air quality in relation to the changes in temperature, humidity, and air pressure from the data that have been stored in the Network Thing cloud. The students are motivated in the learning process to find out relationships between air quality and changes to the temperature, humidity, and air pressure. This is preliminary and ongoing research. The early data were collected from interviews with students after the learning process and collecting the results of the observation. Students’ interest increases with the integration of Science Technology Engineering and Mathematics (STEM) in the learning process. This was demonstrated by students during the learning process. From this learning process, students are also aware of the importance of reducing air pollution. Around 86% of students understand the concepts of subject learned and around 92% of students were motivated and enjoy during the learning.
Keterbatasan air merupakan salah satu permasalahan utama petani dalam pertanian maka penggunaan sistem irigasi harus dapat mengaliri air dengan efektif dan efisien pada lahan pertanian. Mengatasi permasalahan petani tersebut, penelitian ini mengusulkan kendali otomatis dan pemantauan pada irigasi dalam sistem pertanian yang disebut dengan smart irrigation. Smart irrigation ini mengalirkan air dengan menyesuaikan kelembaban tanah yang dibutuhkan tanaman pada perkebunan dan menyesuaikan ketinggian air yang dibutuhkan tanaman pada persawahan. Smart irrigation ini dilengkapi sensor soil moisture YL-69 yang akan mengukur kelembaban tanah yang dapat diaplikasikan di kebun dan sensor ultrasonic HC-SR07 yang akan mengukur ketinggian air yang dapat diaplikasikan di sawah. Kelebihan smart irrigation ini selain dapat menyesuaikan dengan kodisi kebutuhan air terhadap tanaman, juga dilengkapi dengan pengaturan rentang batas normal melalui aplikasi Android. Sehingga, smart irrigation dapat diatur dengan mudah oleh petani menyesuaikan dengan tanaman yang akan ditanam, tanpa mengubah pengkodean untuk mikrokontroler. Smart irrigation juga dilengkapi dengan kontrol manual dari Android, serta antisipasi jika terjadi gangguan pada sensor dan memudahkan petani dalam melakukan irigasi. Dalam pengujian sensor ultrasonik pada ketinggian air 8 cm diperoleh rata-rata galat (error) sebesar 3,318966875 persen. pengujian sensor soil moisture pada tanah basah diperoleh rata-rata galat (error) sebesar 0,692159283 persen. Dengan demikian sensor soil moisture dan sensor ultrasonik dapat digunakan dengan baik pada smart irrigation di kebun maupun sawah.
The important role of technology in human life is of course very large, technology can be used in all fields, one of which is in educational media. The use of technology in educational media is a progressive step in an effort to keep up with the times. In accordance with the jargon that is often raised, the function of technology is to lighten what is heavy, bring what is far away. Likewise, the use of technology in education, the presence of technology is to help students more easily access learning materials. One of the technological media that can be utilized in the educational process is the QR Code media. QR Code itself stands for Quick Response Code, which is a two-dimensional barcode introduced by the Japanese company Denso Wave in 1994. One of the problems currently being faced by the Tinggarsari Village Community is the lack of public knowledge about the Bebaturan temple in the village. Bebaturan temple itself is a very ancient temple and has differences from the temples that are currently developing, so that the information data is still very minimal and is only known by a handful of people. So that the scattered data needs to be collected and presented in writing. The final data is then presented in the form of a QR Code so that people can easily access it. The problem solving method used is the data triangulation method.
Pada tahun 2017, Lampu Penerangan Jalan Umum (LPJU) di seluruh Indonesia telah berjumlah 225.249 unit, yang sebagian besar masih menggunakan lampu penerangan berteknologi lama dan tidak efisien sehingga mengonsumsi energi listrik yang sangat besar yakni 3.503,47 GWh/tahun. Untuk itu sangat mendesak diperlukan usaha penghematan energi listrik di sektor LPJU. Guna mendukung upaya ini maka dalam penelitian ini dilakukan analisis teknis dan ekonomis untuk menguji kelayakan proyek retrofit/ penggantian LPJU di Jalan Raya Gatot Subroto Denpasar dari Lampu Merkuri 250 W menjadi Lampu LED 93 W. Pada akhir studi diperoleh bahwa proyek retrofit ini layak secara teknis karena mampu menghasilkan kuat pencahayaan rata-rata 13 Lux (dibandingkan syarat SNI lebih dari 11 Lux) dan penghematan konsumsi energi listrik 157,65 MWh/tahun serta layak secara ekonomis karena memenuhi kriteria kelayakan investasi Net Present Value (NPV), Profitability Index (PI) dan Discounted Payback Period (DPP).
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