Design of GSM-Based Tele-monitoring and Alarm System for Disposable Diaper

The Internet of Things gives us an idea of connecting what we care about together. Based on this idea, this paper provides a method to connect the information of the aim place's temperature or humidity to users through GSM network. The paper also presents the steps of the design and our successful experiments. Firstly, an overall design is presented. It is mainly about how the MCU detects humidity and controls GSM module to send a short message. Then, the needed components are chosen. ATmega16A is chosen as the micro controller. SIM900A is chosen as the GSM Module. SHT11 is chosen as the sensor. After that, the hardware circuit is designed. At last, the paper introduces a detailed method of collecting data by SHT11 and sending message by SIM900A.