Kadar oksigen dan suhu dalam air budidaya harus diperhatikan dengan baik. Jika kadar oksigen dan suhu tidak diperhatikan maka akan berakibat fatal pada metabolisme tubuh ikan sehingga energi pada ikan untuk bergerak, berkembang, dan bereproduksi akan terganggu. Hal tersebut juga dapat menyebabkan kematian pada ikan. Penelitian ini bertujuan merancang sistem dengan teknologi Internet of Things (IoT) untuk memonitoring kadar oksigen dan suhu pada air kolam budidaya ikan lele. Metode yang digunakan adalah merancang sebuah sistem kontrol monitoring oksigen dan suhu pada air kolam budidaya terintegrasi ke internet menggunakan Arduino WiFi serta sensor Disolved Oxygen (DO) dan sensor suhu DS18B20 untuk pengambilan data. Pengambilan data dilakukan secara realtime. Hasil pengujian menunjukkan bahwa sistem dapat bekerja dengan hasil kadar oksigen dan suhu dapat dimonitoring melalui pengiriman data ke dalam database dan ditampilkan pada website serta mobile phone.

Lamps are household electrical devices. In general, the lights are controlled through switches which require the user to move towards the switch to turn the lights on/off. To save time, lights can be controlled via the internet of things using the NodeMcu ESP8266. The purpose of making a smart lamp using the NodeMCU ESP8266 is to make it easier to turn it on and off with a smartphone without the need to look for a switch. This smart lamp can be controlled via a virtual button on the Blynk application or based on a set clock. The results obtained from the design of this tool are that the smart lamp will turn on at 8.00 AM and will turn off automatically at 3.00 PM, or by pressing the virtual button on Blynk. There is a slight delay when the lights will turn on or off, this is caused by the strength of the internet from the wifi connected to the ESP8266.

No abstract

Widarapayung Wetan, Binangun District, Cilacap Regency is an innovation village entrusted by the Regional Planning, Development, Research and Development Agency (BAPPEDA) of Cilacap Regency to the Cilacap State Polytechnic. The current partner's problem is the difficulty in introducing cultural tourism to tourists visiting Widarapayung Wetan Village. One of the cultural tourism potentials in Widarapayung Wetan Village is a traditional Javanese musical instrument, namely the gamelan. Currently, gamelan cultural activities in Widarapayung Wetan Village have been actively carried out on a regular basis based on the existing schedule of activities. Therefore, in order for gamelan to become a unique attraction, it is combined with electronic technology to become an electric gamelan. The electric gamelan can be used by visitors freely to learn to play the gamelan, while the existing original gamelan can be well preserved for rehearsals and performances. The electric gamelan made are saron and demung instruments. The saron and demung blades use acrylic material. When the acrylic blade is hit/beaten with a hammer, the piezoelectric sensor will receive vibrations when the blade is hit. The vibrations will be converted into electrical energy. The electrical energy will go through the Zener diode and 1 M? resistor, and will enter into IC 4051. IC 4051 in the system functions as a multiplexer that will take only one input according to the tone of the saron or demung instrument blades that are hit. The input will be passed to Arduino for processing. Arduino will issue a sound output in the form of a tone according to the blade that is hit. The electric gamelan tone is the original tone recorded by the saron and demung instruments. The two electric gamelan instruments, saron and demung, were tested together with wiyaga and the head of the Padhang Bulan Widarapayung Wetan art studio. The next activity was socialization with members of the Padhang Bulan art studio and the village apparatus of Widarapayung Wetan.

Cilacap Regency is a coastal area south of the island of Java. The purpose of this study is to determine the potential of raw materials available in the South Cilacap Coastal area and to determine the potential power that can be generated for the PLTH system through the calculation of the raw material data that has been obtained. This research method begins with direct measurements of wind speed and light intensity. Both devices read data in real time and connect online. The data obtained is processed to determine the wind speed and the average intensity of sunlight. The results of these calculations are entered into the equations to calculate the potential power that can be generated. Based on the calculation, the average wind speed is 3-4 m/s and the light intensity is 54612 watt/m2. The results of the calculation of the potential power that can be generated from the PLTB system in the coastal area of ​​South Cilacap is equivalent to 508 watts/day. The potential power that can be generated from PLTS is 10.8 kW/day. The total potential power that can be generated from the PLTH system on the coast of South Cilacap is equivalent to 273.22 kWh/day.