Health monitoring systems become a hot topic and important research field today. Research on health monitoring were developed for many applications such as military, homecare unit, hospital, sports training and emergency monitoring system. In this project, an real-time monitoring system of some critical vital signs is developed for elderly people, because The people who ages over 60 years old encounter accidental incidents over 60 percent. That system may help doctor or people in family monitor the emergency alarm from patient or elderly people. The vital signs of health status that are the important parameter in health monitoring system consists of blood pressure, heart rate,body temperature and respiratory rate. In this work, we consider two parameters of the vital signs which are heart rate and the respiratory rate.
The data helps to prevent and protect the patient’s. Wireless technology was developed in many applications that becoming a part of human activities such as agriculture, military, medical care, smart home system etc. Distinctly, wireless sensor networks (WSN) play a crucial role in such a monitoring system application, for the reason that WSN can offer some advantages over other types of wireless systems, especially its scalability, power management and flexibility of architecture. As a matter of fact, there are two popular standards in the wireless personal area network (WPAN), namely, Bluetooth and ZigBee. This work was focused on the capability of wireless sensor networks as an efficient tool to monitor patient’s health . This situation makes it difficult to develop and challenge because many applications in WSNs developed for fixing the position of member in wireless personal area network (WPAN). The ZigBee technology is adopted for using as a real-time health monitoring system on a patient. In this work, it has  developed  a group of sensors for measuring heart rate, respiratory rate with real-time monitoring system based on ZigBee wireless network. All wireless sensor hardware operates in point-to-point and do not allow for networking sensors with real-time patient movement monitoring Some reported works developed non-friendly usage and consumed much power to operate. The developed real time heart rate and respiratory rate monitoring system has a pair of light-emitting diodes (LEDs), One of LED has a wavelength in red and other one is in infrared region. The light is detected by a photodiode. The LEDs and photodiode was packed in  strip that facing through a patient’s fingertip. Heart rate and respiratory rate data is read every a second and stored on microcontroller. The data from microcontroller unit is sent to base node via ZigBee wireless network and stored on data-logging PC. The data from system unit consists of heart rate, body temperature and respiratory rate, wireless communication signal strength. The system consists of a microcontroller unit, power supply circuit, photo-detector module, ZigBee module, digital to analog converter IC, operating amplifier IC, driver circuit for red LED and infrared LED, couple of light-emitting diode (LEDs). In this work, we use microcontroller unit for controlling the processing in the sensor module, which features nano-watts technologies microcontroller. The microcontroller starts the process by sending digital data to digital to analog converter and the output was amplified by operating amplifier IC. After that, the signal from operating amplifier IC are driven the couple of LEDs in the difference time. Microcontroller unit can get the signal from photo-detector to find the heart rate directly from pulse of infrared LED. The data such as heart rate,   body temperature, respiratory rate and wireless signal strength are stored in microcontroller and be ready for sending to base nodes. ZigBee module provides AT-command for controlling from microcontroller unit such as request to send (RTS) the data or get the signal strength indicator.