It is not difficult to see that in recent years we have witnessed many technological revolutions. We are witnessing huge changes in software, mobile devices and increasingly efficient processors with surprisingly low power consumption. Completely new areas of technology are also emerging, which were not even thought of a few years ago. The Internet of Things (IoT) may serve as a perfect example of such an area. More and more often we hear about devices that will automatically exchange data with servers or the cloud, as well as with each other. Many wireless communication standards have been developed especially for such solutions, among which the XBee technology is of particular interest.