This paper analyzes the comparison of data communications using GEO satellites between C-band and Ka-band frequencies in Indonesia which has a tropical rain climate. The data communication uses QPSK modulation on the path of four earth stations by paying attention to six variations of observation time. Parameters, C/ N, Eb/No and link margins, are applied to indicate the communication performance. This study shows that C-band satellite communication can be implemented for all conditions, whereas in Ka-band the success of communication transfer cannot be accessed by all observation times.

Teknologi jaringan Generasi ke-5 (5G) menjadi fenomena yang baru di Sulawesi Selatan dimana akan terjadinya migrasi teknologi jaringan Generasi ke-4 (4G) ke 5G. Menyusul semakin meningkatnya penetrasi pengguna internet, maka wajar jika teknologi 5G perlu segera diterapkan. Penelitian ini menggunakan metode observasi berupa studi literature dan wawancara. Data yang diperoleh dianalisis menggunakan metode Strength-Weakness-Opportunities-Threat (SWOT). Hasil analisis migrasi 4G ke 5G berdasarkan perubahan arsitekturnya adalah Serving Gateway (SGW), Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Evolved-Universal Terresterial Radio Access Network (E-UTRAN), dan Next Generation-Radio Access Network (NG-RAN). Standar pengimplementasian teknologi jaringan 5G berdasarkan rekomendasi International Telecommunication Union (ITU) melalui program International Mobile Telecommunication (IMT)-2020. Pada kurun waktu 2018 sampai 2021, jumlah pengguna internet di Sulawesi Selatan meningkat sebesar 67,6%. Sementara itu selang waktu tiga tahun jumlah desa/kelurahan yang  dapat dilayani Base Transceiver Station (BTS) berteknologi 4G bertambah 335 wilayah. Hal tersebut menjadi salah satu peluang yang dimiliki Sulawesi Selatan untuk mengimplementasikan jaringan 5G. Ditambah lagi infrastruktur yang cukup baik menjadi salah satu kekuatan karena tersedianya 94% BTS 4G dari keseluruhan BTS di tahun 2021. Hanya saja perlu memaksimalkan teknologi Device to Device (D2D). 5th Generation (5G) network technology is a new phenomenon in South Sulawesi where there will be 4G to 5G technology migration. Following the increasing penetration of internet users, the technology needs to be implemented immediately. This study used observation method in the form of literature studies and interviews. The obtained data were analyzed using Strength-Weakness-Opportunity-Threat (SWOT) method. The analysis results of  4G to 5G migration based on architecture evolution are Serving Gateway (SGW), Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Evolved-Universal Terresterial Radio Access Network (E-UTRAN), and Next Generation-Radio Access Network (NG-RAN). The standards required for the 5G network technology implementation are based on the recommendation of International Telecommunication Union (ITU) through International Mobile Telecommunication (IMT)-2020 program. During 2018 to 2021, the number of internet users in South Sulawesi increased by  67,6%. Meanwhile, the number of villages/wards served by BTS with 4G technology expanded by 335 area for three years. This is one of the opportunities for South Sulawesi implementing 5G network. Futhermore, sufficiently good infrastructure is as one of the strengths due to the availability of 94% of 4G BTS from all BTS in 2021. However, it needs to maximize Device to Device (D2D) technology.

The PLN officer in charge of recording kWh meters is sometimes unable to photograph them because men discovered that the houses were unoccupied and their fences were locked. Due to these circumstances, the calculation of the current month’s electricity consumption is equated with the previous month, and customers can be harmed. The purpose of this research is to take a physical photo of the kWh meter showing the electrical power consumption and send it to WhatsApp. Firstly, it needs to set the timer on the DS3231, which determines the date for activating the esp32-cam to take kWh meter pictures and upload them to the server. Next, esp8255 downloads those photos from the server. Finally, esp8255 sends them to the WhatsApp application. In this study, the results were obtained in the form of an Internet of Things (IoT)-based smart home device system. The WhatsApp application is a notification media, taking pictures of analog kWh meters in 3–5 seconds with throughput, reliability, and availability values of 189 bps, 96%, and 95.97%, respectively.

Pompa air alternatif yang digerakkan oleh tenaga hybrid generator diesel – sel surya – baterai dibutuhkan untuk antisipasi terputusnya pasokan listrik PLN. Optimasi penggunaan bahan bakar untuk menggerakkan pompa air tersebut menjadi tujuan dari riset ini dengan menerapkan metode linear programming. Permintaan air oleh pelanggan skala rumah tangga dan daya listrik yang diperlukan dalam menggerakkan pompa air bertenaga hybrid (PATH) ini menjadi pertimbangan kendala-kendala dalam melakukan optimasi. Batasan lainnya adalah mengkondisikan penampungan air terisi full setiap saat dan kapasitas baterai 100% di setiap awal hari. Inisialisasi awal dari tangki air dan baterai menjadi penentu optimumnya penggunaan bahan bakar oleh generator diesel. Kata Kunci: Optimasi, linear programming, daya hybrid, generator diesel, sel surya, baterai

Limited telecommunication network services, even for 2G technology, in some regions due to living in small islands, range of hills and blank spot areas are experienced in Indonesian Republic. One of solutions is proposed by using 11-element Yagi-Uda antenna operated in GSM band of frequencies. Mmanagal software is run to simulate this proposed model in order to analyze antenna performance parameters namely field pattern, F/B ratio, gain antenna, input impedance and SWR. First of all, the antenna performance, operated at frequency of 925 MHz, is the best because of the ideal SWR. Furthermore, the performance parameters of the antenna at GSM's uplink frequency, 902.5 MHz, are good because the SWR value is less than 2 dB. However, drawback of the antenna performance is occurred in which the model antenna is operated at central frequency of GSM downlink, 947.5 MHz. It is stated that radiated pattern, back lobe is more dominant than main lobe, is vice versa with two other operated frequencies. Moreover, the value of SWR, slightly above 4.6 dB, is more than 2 dB.