KSII TRANSACTIONS ON INTERNET AND INFORMATION SYSTEMS VOL. 14, NO. 4, Apr. 2020 1502 Copyright ⓒ 2020 KSII The authors would like to thank to Tokat Gaziosmanpaşa University, Scientific Research Projects Comission (BAP) for supporting this study (Project number: 2017/83). http://doi.org/10.3837/tiis.2020.04.006 ISSN : 1976-7277 VLC4WoT : Visible Light Communication for Web of Things Mahmut Durgun, and Levent Gökrem * Department of Mechatronic Engineering, Tokat Gaziosmanpasa University Tokat, TURKEY [e-mail: mahmut.durgun@gop.edu.tr, levent.gokrem@gop.edu.tr] * Corresponding author: Levent Gökrem Received May 9, 2019; revised August 15, 2019; revised October 6, 2019; accepted October 29, 2019; published April 30, 2020 Abstract Recently, new devices have been developed for the Internet of Things concept. The devices commonly use RF (Radio Frequency) based wireless communication. With the increase in the number of devices, the space allocated for the radio frequency band in wireless communication fills rapidly. Visible Light Communication (VLC) is an alternative, secure and economical communication technology that uses light instead of radio frequencies. While Web of Things (WoT) is the adaptation of the experience and knowledge acquired from the web into the internet of things ecosystems. By combining these two technologies, the development of the Visible Light Communication for Web of Things (VLC4WoT) system, which can use VLC and WoT technologies, has been our motivation. In our study, microcontroller control circuit was created for VLC4WoT system. Control of the circuits over the internet was performed. VLC based receiver and transmitter units have been developed for wireless communication. Web based interface was created for control. The test apparatus consisting of four objects with four outputs and a transfer unit was carried out. In this test, communication was achieved successfully. It was presented in the study that VLC can be used in the web of things architecture. In the future, it is envisaged to use this system as a safe and economical system in indoor environments. Keywords: Internet of Things, Visible Light Communication, Web of Things