This paper presents an Implementation of Li-Fi based home automation system prototype. This system was develop to verify the effect of LED types on VLC transmission. LED is used to transmit the input data information to the receiver LDR through visible light communication (VLC). Arduino microcontroller was used to retrieve information from the temperature sensor, light sensor, PIR sensor and MQ2 gas sensor. The output data of sensors were sent to LDR by LED. The result demonstrates that the colour types of LED has an effect on transmission distance and the voltage of LED is proportional to the distance. Red LED has better performance compared to others.

Since February 2020, Indonesia was struck by the Covid-19 pandemic. This led to the imposition of Large-scale Social Restrictions. The government issued a policy of working from home, learning from home, and worshiping at home. To carry out their activities from home, people are becoming increasingly dependent on the internet. With the increasing use of the internet during this pandemic, we are conducting a study on whether there is a phenomenon of internet addiction and social media in Indonesia. A survey of 2309 respondents from 31 provinces in Indonesia using Kimberley Young's Internet Addiction Test (IAT) has been conducted. After the data cleaning process to remove redundant data, only data from 2206 respondents were analyzed further with the binary logistic regression method. 25% of respondents were indicated with Internet addiction. High school students and college students tend to have a 1.7% higher risk of addiction. The length of time accessing e-commerce web and social media also increases the risk of internet addiction. YouTube and Instagram are social media applications that tend to pose a risk of addiction to respondents. A critical analysis of the Internet Addiction Test from a Philosophy of Science perspective was conducted. Finally, we formulate recommendations on strategies the government and society could take in dealing with the problem of internet addiction.

Power Line Carrier merupakan sistem pemanfaatan jaringan listrik sebagai media transmisi data guna menghubungkan beberapa device untuk dapat berkomunikasi. Teknologi komunikasi ini biasa dikenal dengan Power Line Communication, dimana jalur yang digunakan untuk melakukan transmisi listrik juga dapat berfungsi sebagai jalur komunikasi transmisi data. Masalah utama yaitu kesalahan pada pertukaran informasi atau data yang diterima berstatus invalid. Pada penelitian ini dibuat sebuah alat guna untuk meningkatkan validasi data pada komunikasi power line communication dengan menggunakan metode CRC (Cyclic Redundancy Check) guna memaksimalkan proses keputusan dalam sebuah sistem. Alat yang akan dibuat berupa Kwh-Meter yang diharapkan dapat digunakan langsung pada media komunikasi Power Line Communication serta berguna untuk memonitoring penggunaan daya suatu bangunan/laboratorium dalam case saat koneksi internet sedang nonaktif. Kwh-meter ini dapat di monitor melalui local webserver yang tertanam pada device master. Alat ini terdiri dari 1 master dan 3 slave. Jarak komunikasi maksimum dari alat ini sejauh 100M telah di uji dengan cara komunikasi antar ruangan menggunakan baudrate 9600bps sebanyak 10 Bytes data per detik. Penggunaan CRC untuk pengiriman data dari 3 Slave ke 1 Master dapat memberikan koreksi maksimal untuk jarak dibawah 100 meter.

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