Prototype Sistem Monitoring Pintu Rumah Menggunakan Sensor Ultrasonik Dan Mikrokontroler Nodemcu Berbasis Iot
In general, the activities of people who are busy working so much that they are rarely at home. It can also be seen that this makes it very prone to crime, including robbery or theft. To avoid this, homeowners usually provide security for their homes, namely by only providing conventional key security, which is usually in the form of padlocks, chain locks and so on. With this problem, the author wants to build a notification system on the door that develops an object detection system using an ultrasonik sensor that is integrated with an automatic processing monitoring system that is able to provide information to a smartphone if the door is open and closed. The problems discussed are how to design and implement a notification system tool on the door of the house using ultrasonik sensors. The system will run using the NodeMCU microcontroller, Ultrasonik Sensor, and the Blynk application as a notification signal receiver. In this study, the author uses the prototype method which aims to give the user an idea of how this device will be built. From the results of making a prototype monitoring system on the door of the house, it shows that the sensor is functioning properly. The ultrasonik sensor can detect the open door with the farthest distance of 341 cm and 2 cm for the closest distance which can be adjusted as needed.