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A wireless sensor network (WSN) is a computer network consisting of spatially distributed autonomous devices using sensors to cooperatively monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants, at different locations.[1] The development of wireless sensor networks was originally motivated by military applications such as battlefield surveillance. However, wireless sensor networks are now used in many civilian application areas, including environment and habitat monitoring, healthcare applications, home automation, and traffic control etc.in this book we mainly focused Health care for elderly people by using multi sensor systems.

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Mr.K. Srinivasa Reddy is Completed Ph.D from OPJS university,Churu,Raj.2016. and also Associate Professor of the Electronics and Communication Engineering in Nagole Institute of Technology and Science, Hyderabad .He received his B.Tech degree in Electronics and Communication Engineering and M.Tech degree in E.SYS.from JNT University, Hyderabad,

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