Industrial revolution 4.0 has been marked with the human needs of big data from all over devices, and it has been triggering the massive development of the Internet of Things (IoT). In this paper, an IoT system for solar power monitoring system is developed to measure voltage, current, temperature, and humidity using a voltage divider, ACS712, and DHT11 sensor. An ATMega328 microcontroller then processes data, and hereafter it is given to the ESP8266 module to be sent thru an internet connection via the TP-Link TL-MR3420 modem. The result of the running system shows that the proposed IoT system can well run to measure the system variables. As samples of the test measurement data on 4th April 2021, about 70%RH, 350C, 13V, and 0.25A for humidity, temperature, voltage, and current respectively can be sensed. However, the data is sent to a cloud system and displayed in the LCD for local monitoring.

Topics
Analog circuits, Microcontroller, Solar energy, Information technology
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