Control of DC Motor in Laundry Liquid Waste Treatment based on ESP32-S3 and Thingsboard Platform

Benediktus Arisona Bao (Department of Electrical Engineering, Faculty of Vocational Studies, Universitas Negeri Surabaya, Surabaya, Indonesia)
Widi Aribowo (Department of Electrical Engineering, Faculty of Vocational Studies, Universitas Negeri Surabaya, Surabaya, Indonesia)
Ayusta Lukita Wardani (Department of Electrical Engineering, Faculty of Vocational Studies, Universitas Negeri Surabaya, Surabaya, Indonesia)
Aditya Chandra Hermawan (Department of Electrical Engineering, Faculty of Vocational Studies, Universitas Negeri Surabaya, Surabaya, Indonesia)

Vokasi UNESA Bulletin of Engineering, Technology and Applied Science
Vol. 2 No. 3 (2025)

Untreated laundry wastewater contributes to environmental pollution, with TSS levels reaching 600 mg/L, far above the 100 mg/L limit set by East Java Governor Regulation No. 72 of 2013. This research develops an IoT-enabled automated wastewater treatment systemutilizing the ESP32-S3 microcontroller, integrated with pH, TSS, and temperature sensors, and featuring real-time monitoring via theThingsBoard platform. A DC motor serves as an actuator for chemical dosing and mixing, controlled by sensor feedback. The system serves small-scale laundry businesses with limited access to centralized treatment. Testing showed 100% effectiveness in reducing TSS and 95% in stabilizing pH. Data transmission delays averaged 4 seconds for turbidity and 5 seconds for pH. Processing effectiveness was evaluated based on regulatory compliance, with 71% classified as Feasible, 5% as Very Feasible, and 19% as Less Feasible. Whilecalibration and reliability improvements are necessary, the system demonstrates potential to assist local laundries in meetingenvironmental standards. Future work will focus on enhancing sensor accuracy and implementing fault-tolerant control.