International Journal of Academic and Applied Research (IJAAR)   Year: 2021 | Volume: 5 | Issue: 12 | Page No.: 15-18 Smart Gate System Using Internet of Things and Kontlin Interfaces System E Handoyo, Muhammad Arfan, IG Randa Abstract: At this time the industry is in the Industry 4.0 era, which means that there is computer interference in human business processes. Not only in the form of conventional computers and mobile phones, but also in the form of Machine Learning and Artificial Intelligence. Therefore, an Internet of Things (IoT) system is very possible to be created and then used to help human work. IoT system is the concept of a device capable of transferring data without the need to be connected to humans, but the internet as the medium. And at a time when the Covid-19 virus is still very vicious at this time, of course the government recommends closing some public places and opening some of them with the conditions of health protocols. In this case, an application will be made that is part of an IoT system. This IoT system will be tasked with monitoring data in public places, in this case specifically for mosques. The application that will be made is an android application that serves to display data from the database.