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This work proposes a tool that can be used for monitoring and detecting electricity leakage current by utilizing common RCD core. Those values could be remotely observed by utilizing Internet of Things (IoT) technology. The leakage current is measured using common RCD's toroid before being inserted into analog input of IoT Board, an ESP8266 based microcontroller. The measured voltage will be sent to Blynk server wirelessly. Finally, users will be able to monitor its changes in values by using common smart phone, through Blynk app. From the test, the induced voltage was 0.032 V and 2.568 V during the normal condition and the leakage current condition respectively. It showed that the leakage current was possible to be detected and monitored using this system.

Many applications could be developed in Android Phone for the improvements of modern car's condition monitoring. That could be a simple user interface for an On-Board Diagnostics (OBD) tools for a car condition monitoring in nowadays manual driving, or up to replacement of its driver for further control in an autonomous driving. However all of them will be so much dependent on its position tracking. In this work, a position tracking system would be designed started from the system's architecture with telecommunication network until its behavior with UML Diagrams. Overall, the system consisted of two parts. They were an android application (app) and the nodeJs web server. The app would deal with the data collection. Then, the web server would show the result using map interface from Open Street Map. From a testing trip, 611 position points were obtained. From those points, it was found also that the shortest processing time between the records was 5 seconds and the longest could be more than 3 minutes.