IoT-Based Saline Bottle Monitoring and Control System Using Wi-Fi and Android Application

Abstract: Continuous monitoring of intravenous (IV) saline bottles is important during fluid administration because the saline level needs to be observed until the required quantity has been delivered. In conventional practice, the bottle is generally checked manually by healthcare personnel. This can be difficult when several patients require attention at the same time. To address this problem, this paper presents an IoT-based saline bottle monitoring and control system using ESP32-C3, capacitive sensing, Wi-Fi, and an Android application.

The proposed system uses an XW02E-based capacitive sensing arrangement mounted externally on the saline bottle to detect changes in the saline level. The ESP32-C3 processes the sensor output and transmits the saline status through Wi- Fi to the Android application. LED and buzzer indicators are used for local status indication and alerts. When the saline level reaches the defined critical condition, a servo-operated flow-control mechanism is activated to stop the saline flow. The Android application provides the saline status and notification information to the user.

A working prototype was developed and tested under controlled conditions to verify the operation of the saline-level sensing, wireless communication, alert generation, and ON/OFF flow switching mechanism. The developed prototype demonstrates the practical implementation of combining saline-level monitoring with automatic ON/OFF flow switching in a compact IoT-based system. Further testing with different bottle types and real healthcare conditions is required to evaluate its performance for practical deployment.

Keywords: IoT, Saline Bottle Monitoring, Saline Flow Control Switch, ESP32-C3, Capacitive Sensing, Wi-Fi, Android Application, Smart Healthcare.