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.