Design and Implementation of a Bluetooth-Based MCU and GSM for Wetness Detection

Diaper rash is harmful to babies and the elderly, so many researchers have improved wetness-detection technologies to assist in investigating solutions. In addition, enuresis is a primary healthcare problem in everyday nursing care, particularly for frail elders and patients with dementia in nursing homes. Bleeding is defined as blood leaking from the circulatory system and can cause death. Therefore, an essential part of surgery and first aid is controlling bleeding. Our Bluetooth-based wetness and bleeding detector consist of a wetness sensor, microcontroller, Bluetooth transceiver microcontroller, and GSM modem or computer. Two or four fine conductors between sheets of medical bandage or diaper layers comprise the wetness sensor. Wires connect to a pair of pressing studs protruding from one end of the diaper or gauze. When the wires are wet, the conductance between the studs drops exceeding a pre-established threshold, initiating the alarm. The Bluetooth transceiver passes the warning alarm through a microcontroller to the GSM modem. Consequently, a smartphone or other alarm starts ringing, informing healthcare personnel that wetness or bleeding is occurring.