No abstract

Power outlets are electrical devices that are very important in electrical systems. This paper discusses the development of a smart power outlet prototype designed to increase its capabilities. The prototype design is not only to provide electrical power but also to measure, display and transmit the value of electric current and power used. Another ability is to monitor the condition of the room, such as light intensity, temperature, and humidity. This capability enhancement can be used to optimize the building electrical automation system. This prototype is based on ESP32 System-on-a Chip microcontroller which is equipped with several sensors and supporting input and output components. The sensors used are the hall effect sensor to measure the value of electric current; light, temperature, and humidity sensor to measure the condition of the room. Values obtained from all sensors will be displayed on a small OLED display and sent using a WiFi network to a local web server. Furthermore, these values can be accessed and displayed in real time using an Android OS application on a cell phone. In addition to the monitoring function, the application can also perform a control function to turn on or off the power outlet wirelessly. This prototype has been designed, build, and tested to determine the validity of its function. The results show that in general, this prototype can function properly in accordance with the design specified.

Hidroponik merupakan metode pembudidayaan tanaman tertentu menggunakan air sebagai media tanamnya. Pemenuhan dan pemeliharaan tanaman hidroponik relatif tidaklah sulit, namun membutuhkan perhatian yang lebih, seperti pemantauan kondisi larutan yang harus dilakukan secara rutin. Sampai saat ini, pemantauan parameter larutan nutrisi tanaman hidroponik masih banyak dilakukan secara manual. Penelitian ini bertujuan untuk mendapatkan sistem monitoring suhu dan kepekatan larutan di media tanam serta sistem pengendali otomatis penambahan larutan nutrisi tanaman hidroponik. Sistem menggunakan sensor suhu DS18b20 dan sensor kepekatan larutan SEN0244. Sedangkan komunikasi jarak jauh antara user dan unit hidroponik menggunakan modul LoRa RFM95W dengan frekuensi 915 MHz. Secara otomatis sistem akan memberikan larutan nutrisi apabila kadar kepekatan larutan sudah mengalami penurunan di bawah 1000 ppm. Hasil pengujian pengiriman data pada kondisi LOS mendapatkan jarak jangkauan terjauh adalah 700 m dengan RSSI -103 dBm sedangkan pada kondisi NLOS didapatkan jarak terjauh hanya 200 m dengan RSSI -101 dBm. Selain itu hasil pengujian kondisi kepekatan air selama dua minggu menunjukan bahwa saat sensor kepekatan nutrisi mendeteksi nilai di bawah 1000 ppm maka pompa bekerja memberikan larutan tambahan.

No abstract

is a player operates in the desktop, made to be able to display multimedia files and live tv broadcasts. This application is built using Visual Studio 2010 with the .Net programming language on Windows. The testing are about the function, performance and quality of the application. The results are successful according to the design. The performance evaluated by testing the test command on the functions of application using Testingwhiz. The Risk Based Testing method is used of the probability error that occurs with the impact of the error generated by the probability. It is show several risky functions, there are stream, browse, play, open, close, go, back and refresh buttons. A risky function is the core in an application that happen when exposed to an error, it will inhibit the performance of the application itself. Quality testing results based on ISO-9216 standard (currently ISO-25010) about software quality showed that PSBM Player in the Medium category of 6 characteristics that influenced the quality with a questionnaire on 31 respondents. The data shows that the overall external quality of the PSBM Player is 0.35 which is in the Medium category and for Quality in Use of application is0.69 which is in the High category.