<![CDATA[Hydroponic systems can be a solution in producing more quality and sustainable vegetables. The useof nutrient solutions through fertigation systems is an important part of hydroponic systems. However,many of the control of the fertigation equipment is done manually, so workers often have difficulty incarrying out routines. The purpose of this research is to design and build an automated system onfertigation equipment using microcontroller technology and the Internet of Things. The researchmethod was carried out by designing a prototype of an automated fertigation system that involves thefunctional design and structural design of hardware and software for data processing. The results ofthe design of the automatic fertigation prototype using ESP 32 as a microcontroller, KS0429 TDSmeter sensor, DS18B20 temperature sensor, pH 4502C sensor, JSN-SR04T sensor as water levelmeter, RTC DS3231 SN as a timer, relay as an output switch, water pump as an output to increasenutrients and water, 16x2 LCD, buzzer and button as a monitoring and control system, and Blinksoftware as a monitoring system through smartphones. The performance test of the tool is carried outby means of sensor test and system test. Tests on TDS meter sensors, ultrasonic sensors, temperaturesensors, pH sensors show value of Sig. (2-tailed): 0.000 < 0.05, meaning there is a significantcorrelation, and Pearson Correlation = 1, indicating a perfect correlation, and the test results of thesystem with RMSE = 0.042, then the microcontroller-based and IoT-based automatic fertigationprototype can be declared to work well.]]>
