Perancangan Sistem Pengukuran Kadar pH Hidroponik dengan Menggunakan Analisis Fuzzy Berbasis Mikrokontroler Nodemcu ESP8266 dengan Internet of Things (IoT)

Abstract

Hydroponics is a plant cultivation technique that uses water as a growing medium which contains certain levels of nutrients and oxygen. Hydroponics is a technique for cultivating plants in a controlled environment, without soil, by providing controlled plant nutrients, and can be carried out using or without substrate. The factor that influences the hydroponic plant cultivation system is the pH quality of the water. Therefore, we need a system that can measure the PH level value in hydroponic plants. This final project aims to create hardware and software to control water pH and monitor the environment of hydroponic plants based on the Internet of Things (IoT). The analysis used in this system is fuzzy analysis. The working system of this tool is a sensor that reads the hydroponic water samples that have been provided. The input to this system is a PH sensor which measures the pH level of hydroponic water. Then convert the sensor analog values to digital values. After that, send the sensor level value to the slave using SPI communication and process it using a fuzzy algorithm. After that, the initial process of fuzzification, fuzzy rule and defuzzification is carried out so that the pH sensor value is obtained in a state of fuzzy rule composition. The analysis will determine Low, Medium and High indications with poor, good and not good output. The results of the research showed that the pH sample that had been read had a data value of 6.06. The results of the fuzzification of the rule are 0.735 predicates in low fuzzy, 0.265 predicates in medium fuzzy, and 0 in high fuzzy.