Arduino based Wireless Heart-rate Monitoring system with Automatic SOS Message and/or Call facility using SIM900A GSM Module

This paper represents a design and implementation of a Wireless Heart rate monitor system using ARDUINO Lilypad which is enabled with the feature of sending SOS messages or calls through GSM module. Upon monitoring if abnormal conditions arise, a call-ring (for 5 sec) or message (customized message) will be sent to a predefined mobile number depending upon how bad the situation is. There are two parts of the whole process, a transmitting circuit and a receiving circuit. The most important part (the transmitter section) for any medical assistance system is the part which will be associated with the patient .So it has to be easy to use and most importantly easy to carry. In this work ARDUINO Lilypad has been used as the main governing microcontroller board which makes the transmitting circuit wearable. The patient only needs to wear the transmitting circuit in his/her hand with the Pulse sensor attached to the finger. A RF module has been used to make the data transmission wireless and the programming has been done in Arduino IDE.

I. Introduction

In today’s society, one of the main problems of senior people is that there’s no one to take care of them for all the time. So, if something goes wrong, if they are sick they are on their own and remain unattended. In maximum cases, simple weakness or illness turns into loss of life just because these elder people remain unattained. The motivation of this work is to provide a wireless heart rate monitoring system which can send SOS message or call to a pre-defined mobile number depending on how bad the current status of the heart rate is. The proposed system is consisted of ARDUINO lilypad, pulse sensor, ARDUINO UNO, SIM900A GSM module and to make the system wireless a RF trans-receiver module has been used. The pulse sensor in the transmitter circuit detects the signal from the finger and then sends it to the governing microcontroller which helps to detect the heart rate and depending upon the range of heart rate a message is sent with the help of the transmitter module. The receiver module in receiving circuit receives it and sends it to microcontroller of this circuit. Depending on the received message it instructs the GSM module to send message or call or stay neutral.