Wireless sensors nodes with a single accessing from one AP (access point) to another have addressed the usefulness of these sensors in sending and retrieving data. This book has tested different wireless techniques for biological sensor networking by reporting the advantages and the disadvantages of these techniques in monitoring the body temperature. The founding addressed that ZigBee platform provides a high communication performance for wireless monitoring systems. The proposed circuit is helping on generating early warnings from the received signals of the patient body. Moreover, the proposed circuit has the ability to determine the patient''s temperature in real-time status inside the hospital. This book also stated the hardware and software requirements of the proposed wireless body temperature monitoring based on ZigBee wireless, AT89C52 micro-controller, and temperature sensor (100K6A1A) for serving the biomedical needs. Finally, the proposed design has achieved acceptable performance in terms of temperature accuracy (±0.3 °C), maximum indoor coverage range (49 m), and 100% efficiency in multi-tag communications.