• The Journal of the Korea institute of electronic communication sciences
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• v.19 no.1
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• pp.165-172
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• 2024

In this paper, we designed a smart home system that can be used intuitively and easily in everyday life, such as sending text messages to users, providing various information and scheduling using smart AI, and providing lighting and atmosphere suitable for the atmosphere in situations such as listening to music using neopixels, as well as using ESP32, RFID, and Google Cloude Console using raspberry pie. As a result of the experiment, it was confirmed that security characters were normally sent to users when RFID was recognized on ESP32 connected to Wi-Fi even if the power was reconnected, and smart AI using Neopixel lighting, Raspberry Pie, and voice recognition, which calculated frequency, also changed the recognition rate over distance, but it worked.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.4
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• pp.709-718
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• 2021

In this paper, it can be seen that the number of abandoned dogs increases every year through the statistics on the occurrence of abandoned animals. With the goal of reducing the number of stray dogs, a smart pet dog shoulder strap is implemented based on a real-time location tracking system using the ESP32 module and GPS sensor. It is an ESP32 module with a built-in Bluetooth module. It is input to the MCU using various sensors, and finally outputs to a smart-phone application, and communicates through the built-in blue-tooth module. In addition, it uses Neopixels to compensate the weaknesses at night through LED light emission, and automatically sets the warning distance to design a music playback system through the LED flashing effect and MP3 module. In addition, a smart pet dog shoulder strap was designed to help pet dog health care by measuring the moving distance according to the amount of activity through the gyro sensor.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.01a
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• pp.201-204
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• 2021

본 연구에서는 휴대 할 수 있는 선형 LED 전광봉으로 2차원 LED 전광판 효과의 구현을 시도하였다. 전광봉을 회전하면 전광판의 효과가 나도록 구성한 것으로, adafruit의 스트립(strip) 형 네오픽셀(NeoPixel) 1 × 16 LED으로 형성되는 구조물을 만들고, 이를 제어 할 수 있는 회로와 제어 프로그램을 설계하고 구현하였다. 구현한 전광봉은 큰 전력 소모에도 문제없도록 리튬 이온 충전지를 이용하여 전원이 공급되도록 하여 휴대성을 구현하였고, 블루투스 칩이 부착된 아두이노를 이용하여 하드웨어 구성을 완료하였다. 아두이노에는 C++를 이용하여 전광봉으로 전광판 효과를 볼 수 있도록 LED들을 통제하는 제어용 프로그램을 구성하였을 뿐 아니라 블루투스를 이용한 스마트 폰과 통신할 수 있는 프로그램을 구현하였다. 대략 6도 단위로 LED가 제어 되도록 하여 1회전에 16 × 60 정도의 전광판 효과를 볼 수 있다. 스마트 폰에는 원하는 전광판을 구성할 수 있도록 색상 팔레트 형성 기능과, 통제용 전광판의 크기를 결정 기능, 크기가 결정된 전광판에서 원하는 색으로 홍보용 내용이 불이 켜질 수 있도록 전광판 구성 기능, 구성된 전광판 자료를 CSV(Comma Separate Value) 파일로 저장하고, 전광봉으로 보낼 수 있는 기능을 구성하였다.

• Journal of Digital Convergence
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• v.20 no.4
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• pp.513-518
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• 2022

In the past two years, all sectors of society have been underdeveloped and suffered a significant damage due to COVID-19. In particular, people who were working in many areas of research were unable to do anything due to restrictions on meetings with people and social distancing. The purpose of this study is to develop a social distancing device that allows users to maintain the distance in accordance with the government guidelines through an analysis of people's social distancing methods in the COVID-19 society through UX Design. In order to develop the social distancing device, the distance is expressed by changing the color of LED based on research related to UI design such as ultrasonic distance sensor, battery, charging method, distance display method, etc. The outer form of the social distancing device is designed using 3D, the device is developed by installing ultrasonic distance sensor, neo-pixel module and Arduino after printing a prototype using a 3D printer, and this device is tested to develop a final product that helps the social distancing practice amid COVID-19.