IoT-Based Temperature and Air Humidity Control System for Post-Drying Herbal Plant Storage to Enhance Export Capacity

Dodi Budiman Margana (Jurusan Teknik Elektro, Politeknik Negeri Bandung, Bandung, Indonesia)
Yana Sudarsa (Jurusan Teknik Elektro, Politeknik Negeri Bandung, Bandung, Indonesia)
Nurista Wahyu Kirana (Jurusan Teknik Elektro, Politeknik Negeri Bandung, Bandung, Indonesia)
Bima Gerry Pratama (Jurusan Teknik Elektro, Politeknik Negeri Bandung, Bandung, Indonesia)
Ervin Masita Dewi (Jurusan Teknik Elektro, Politeknik Negeri Bandung, Bandung, Indonesia)
Edi Rakhman (Jurusan Teknik Elektro, Politeknik Negeri Bandung, Bandung, Indonesia)

Jurnal Difusi
Vol. 9 No. 2 (2026): Jurnal Difusi

Post-drying herbal storage requires precise environmental control to prevent quality degradation and financial loss, making technological intervention critical for local industry partners. To address this issue, an IoT-based control system was implemented using an ESP32 microcontroller, four SHT20 sensors with Modbus RTU communication, a Nextion HMI, and hysteresis-controlled actuators. The service method involved field observation, system integration, actuator assembly (heater and exhaust fan), and user operational training. Testing results showed a 100% success rate across all hardware, HMI interfaces, and real-time web monitoring features. The system successfully stabilized storage conditions within target setpoints (25–27°C and 50–65% RH), boosting operational efficiency and product quality preservation for export readiness at CV. Craftindo Prima.