ABSTRACT
This chapter firstly describes Internet of Things (IoT) network topologies which are similar to computer networking, especially for wireless nodes. However, for wired nodes, daisy-chain, also known as bus topology, is preferred. Wireless and wired nodes can be generalized to implement a hybrid topology for a more reliable system.
Next, a block diagram of an IoT network is explained and each sub-part is described in details. The IoT network consists of a mainboard and nodes. Subsequently, a scenario of switching an IoT light state is analyzed. In this scenario, it is assumed that the data are transmitted and received without any fault. Firstly, a bus network topology of this simple scenario is explained and after that from the mainboard communication initial step to the switching actuator step is described. In this part, although there are complex standards for communicating between wired IoT nodes like KNX, for simplicity a simplified form of Modbus standard is used. Generalizing and modifying this part leads to a more reliable, flexible, and secure IoT network.
