Development in technology of information today provides various facilities to support human activity. One technology that facilitates human is the use of automated systems, the application of smart home system makes it easier for users to control household electronic devices. This study addresses one of the smart home solutions with automation systems. The system is built using ESP8266 and Raspberry Pi devices, by utilizing MQTT, REST and Laravel framework protocols. With Arduino, Python and PHP programming, household devices can be controlled both automatically and manually. Control system can be done by using web, chatbot, and physically. The communication used utilizes wireless network. With the designed system, the users can control the device, gain information and get warning. The information provided by the system is obtained from open data on the internet and from the sensor installed on the device.
Telah dilakukan penelitian tentang uji perbandingan suhu dan kelembaban udara menggunakan alat sensor DHT22 berbasis arduino dengan thermohygrometer. Penelitian ini meninjau dari perkembangan teknologi yang semakin berkembang untuk memudahkan pengukuran suhu dan kelembaban menggunakan sensor DHT22 berbasis Arduino. Tujuan dari penelitian ini untuk mengetahui kinerja sensor dan membandingkan hasil pengukuran antara sensor DHT22 dan thermohygrometer. Metode penelitian yang digunakan yaitu metode perbandingan langsung ntara sensor DHT22 dan thermohygrometer standar. Percobaan ini dilakukan dengan metode repeatability sebanyak 5 kali pada masing-masing variasi suhu ruangan. Perbandingan hasil nilai kesalahan rata-rata pada pengukuran suhu dan kelembaban antara sensor DHT22 dengan Thermohygrometer standar menghasilkan nilai 2,99% untuk kelembaban dan-2,31% untuk suhu. Berdasarkan hasil tersebut dapat disimpulkan akurasi dikatakan baik dan dapat diterima karena sesuai dengan data sheet sensor DHT22 yaitu kelembaban yang terukur harus memiliki range antara 2-5% dan ±5 • C untuk nilai suhu.
The increasingly massive use of digital technology requires that the application architecture be designed to have high availability and reliability. This is because when an application cannot be accessed, it will cause no small loss to the organization. Therefore, the development and operation teams must be able to detect when their system is not working well. For that, we need a system that can monitor application performance. In this research, a system is developed to collect telemetry data, namely metrics and traces from an online donation backend application based on the REST API. OpenTelemetry produces telemetry as an open-source telemetry instrumentation tool. Then the telemetry data is collected by the OpenTelemetry Collector which is then stored on the backend of each telemetry. Metrics are sent to Prometheus and traces are sent to Jaeger. The data metrics collected are throughput, request latency, and error rate which are visualized using the Grafana dashboard. The test results show that the monitoring system can collect real-time metrics data with an average delay of 13,8 seconds. The system can also detect when an anomaly occurs in the app and sends notifications via Slack. In addition, the trace data collected can be used to simplify the debugging process when an error occurs in the application. However, the implementation of OpenTelemetry in a REST API-based backend application to monitor metrics and traces has a negative impact on the performance of the application itself, which can reduce the number of request throughput with an average decrease of 23.32% and increase request latency with an average increase of 22.80%.
Dye Solar Cell (DSC) has started to gain interest in the recent years for practical application because of its ecofriendly, low cost, and easy fabrication. However, its efficiency is still not as competitive as the conventional silicon based solar cell. One of the research efforts to improve the efficiency of DSC is to use the passivation layer in between the photoelectrode material and the conductive oxide substrate. Thus, the objective of this simulation study is to investigate the effect of passivation layer on the performance of DSC. Properties from literatures which are based on physical work were captured as the input for the simulation using process, ATHENA, and device, ATLAS, simulator. Results have shown that the addition of two-20 nm TiO2passivation layers on DSC can enhance the efficiency by 11% as the result of less recombination, higher electron mobility, and longer electron lifetime.
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