Microcontroller-based electromagnectic interference (EMI)-shielded baby monitoring system using GSM technology

The microcontroller-based EMI-shielded baby monitoring system using GSM technology was designed to transmit a baby’s vital signs through a wireless medium using a GSM module connected to the main device unit. The device was designed in such a way that electromagnetic interference (EMI) is reduced to a level permissible by the CSIPR standards for medical device and household application by undergoing testing. The device allows remote monitoring of the status of the baby and is safe from EMI susceptibility. The structure of the system is basically having data acquisition modules for the sensors and a GSM module which are connected to an intelligence module with PIC16F877A. The sensor modules consists of a pulse oximeter which measures the oxygen saturation level and pulse rate of the infant, a temperature sensor for temperature measurements of the infant and a sound sensor for detecting sounds produced by the infant. The temperature, oxygen saturation and pulse rate parameters will be displayed and can be viewed on the LCD of the device. If the sound sensor detects noise, it will play a soothing sound on its speaker for the infant. If one of the parameters measured will deviate from the normal ranges of an infant, the GSM module will send a warning notification SMS to the destination cellular phone. Assembly language and AT codes were used for the PIC16F to analyze data and GSM module to send messages to destination numbers