Implementasi Sistem Monitoring Suhu Berbasis LCD dan Internet of Things dengan Sensor DS18B20 pada Proses Perebusan Kacang Kedelai untuk Pembuatan Tempe

Abstract

Indonesia is the largest tempeh producer in the world and the largest soybean market in Asia. In the tempeh making process, boiling soybeans is an important stage that affects the quality of the final product. However, this process is often done manually and without an accurate temperature monitoring device, increasing the risk of failure during fermentation. Therefore, this study aims to design and implement a temperature monitoring system based on LCD and Internet of Things (IoT) with a DS18B20 sensor in the soybean boiling process. This system is built using ESP32 as a microcontroller, a DS18B20 sensor for measuring the temperature of the soybean boiling air, a 16x2 LCD to display local temperature, an I2C LCD module for efficient pin usage, a USB Micro Adapter as a connection to the power supply, and the Blynk application to monitor temperature in real time via a smartphone. The test results show that the system is able to read and display temperature data accurately and stably on the LCD and via the Blynk platform. The sensor works well in the boiling temperature range, and users can combine temperature conditions remotely via an internet connection. With this innovation, UMKM can increase the efficiency and consistency of the quality of the tempeh produced, and reduce dependence on manual expertise.