The Internet of Things phrase has a number of stereotypical images from the beginning. A home fridge that orders its own supplies (why?); controlling everything in the house through a smart phone or a smart city that can solve traffic jam, garbage, air pollution and all other life problems. For industry experts, IoT is linked to unresolved security and real-time issues. And many people in the public sector or in the utilities see super smart 2-dollar wireless boxes, where the battery lasts for 10 years. Our latest article explains where the individual technologies have their limits and what benefits have well-known Ethernet and other networks and protocols based on it.