Abstract
Komatsu PC200-8M0 excavators operate mostly in the mining and forestry sector that covers a very large land area up to thousands hectares. Operation of this excavator requires a fuel tank for refueling process. In many cases, there were fuel thefts from the fuel tank of this excavator because the excavator were located in remote area. To overcome this problem, it is necessary to develop a fuel monitoring tool that can monitor and send warnings to the excavator owner if there is any fuel access into the excavator fuel tank during the rest time of the excavator. The monitoring tool is developed by using a NODEMCU ESP8266 microcontroller that connected to the internet network so that it will be able to communicate with the Thingspeak webserver. With internet access, the monitoring process can be carried out by using a computer and also smart mobile phone.
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