Abstract:In the rapidly growing Internet of Things (loT) applications from personal electronics to industrial machines and sensors are getting wirelessly connected to the Internet. Many well-known communication technologies such as WiFi, ZigBee, Bluetooth and cellular are used for transfer data in IoT. The choice of corresponding technology or combination of technologies depends on application or other factors such as data requirements, communication range, security and power demands, battery life. In this paper we will focus on ZigBee wireless technology and testing ZigBee end devices in order to see how transmission range impacts on quality parameters.