Design of Gas Pressure and pH Pressure Monitoring and Control System using ESP32 on IoT-Based Biogas Digester

Abstract

The design of the monitoring and control system used to support the biogas production process uses a control system with an ESP32 microcontroller and a gas pressure and pH monitoring and control system by installing a pressure sensor and a pH sensor that can monitor the condition of the digester based on the Internet of Things (IoT). The purpose of this research is to build a monitoring and control system based on the Internet of Things that allows checking gas pressure and pH in real-time. The devices used are BMT180 sensors and pH-4502C sensors as pressure and pH detectors. ESP32 microcontroller as a data processor so that the detection of BMT180 sensors and pH-4502C sensors can be displayed on the website. The application of the internet of things-based system to the monitoring and control system of gas pressure and pH can be accessed in real-time. The results obtained from this design are for the pressure monitoring system of the pressure process that fluctuates with ups and downs that form a regular wave indicating that the fermentation process is going well in biogas formation. Furthermore, for the pH of the graph that is read experiencing a stable pH ranging from 6-8 this shows that the biogas digester functions properly in microbial activity in the anaerobic process. The performance results show that the monitoring system design can work optimally and can be accessed as long as it is connected to the internet.