Ki-Young Lee, Kyu-Ho Kim, Jeong-Jin Kang, Sung-Jai Choi, Gyoo-Seok Choi, Yun-Sik Lim, Gye-Kuk Kim, Target Location Alerts System Using IoT, Journal of Engineering and Applied Sciences, Volume 13,Issue 5, 2018, Pages 1078-1082, ISSN 1816-949x, jeasci.2018.1078.1082, (https://makhillpublications.co/view-article.php?doi=jeasci.2018.1078.1082) Abstract: With the development of smartphone and communications technologies, markets and IoT technologies combining objects and the internet have rapidly developed. The development of IoT technologies and communications technologies has made it possible to establish ubiquitous environments in which IT devices can be operated in all places during all times. The goal of this study is in the provision of accurate locations of a subject using IoT technologies. Using HM-10 and ESP 8266 Arduino modules, Bluetooth Beacons, ultrasonic sensors and Piezo buzzers, a system that displays the location of a subject easily understandable by users and provides notifications of subject locations was designed and realized. Keywords: Internet of things;Beacon;Arduino;smart phone;communications technologies;IoT