This paper presents the design and development of a multichannel LoRaWAN gateway, based on Raspberry Pi 3 model B+ and IC880A-SPI modules. LoRaWAN provides energy-efficient low-power (Low Power, Wide Area – LPWA) communication for wireless-connected devices (nodes) on regional, national or global networks. This technology is gaining increasing popularity and application in Internet of Things (IoT) and Industry 4.0. This publication is devoted to creating a practical model with educational purposes for testing and developing smart communication applications.

For contactless power transmission systems, the actual scientific topic is the parallel two-way communication between the transmitting and receiving sides through the same power electromagnetic module. This technical solution enables the removal of the additional contactless module for the transmission of information and control signals and respectively, for improvement of the operational and technical characteristics of the contactless transmitters. This paper examines inductive methods that integrate bidirectional data transmission in the power module system for energy transfer. Various methods for the simultaneous transmission of energy and data are analyzed. Main attention is paid to the frequency multiplexing method, with its advantages over other methods.

The need for digital transformation in the industry and the related development of the Internet of Things (IoT) has led to the rapid development of various communication technologies and approaches for the implementation of flexible and intelligent communication networks. The main direction is wireless technologies, which make it possible to accelerate the wide range of new applications and services related to smart cities, industry, e-government and others. The possibilities are wide - use of different licensed or unlicensed frequency bands, channel bandwidths, modulation formats, power efficiency, reliability and security. Different network topologies could be applied for the access and collection of data from the sensor networks - star topology, mesh topology, tree topology, each of which has different advantages and disadvantages. This paper discusses the possibilities for deploying low-power mesh networks in an indoor scenario based on IQRF technology. Important communication parameters, approach advantages, and technological limitations will be highlighted. As an example, a study of network behaviour and efficiency in an indoor scenario will be considered.

Passive optical networks are widely used in modern communication networks for broadband access. A major problem in terms of development and operation of these networks is to provide opportunities for management, monitoring and research. The main objective of this work is to implement a practical model of a passive optical network for the delivery of interactive services to perform three main tasks: to allow convenient and easy training of staff; to permit a wide variety of practical research (traffic processing, introducing of new services and optical service modules, etc.); to be a platform for conducting general research in the field of passive optical networks.