This paper discusses the application of wireless energy transfer (WET) for powering smart sensors, addressing the challenges associated with directly utilizing solar energy in environments with difficult access. The study involves a theoretical examination of wireless electricity transfer, complemented by practical implementations to illustrate key concepts. The integration of two primary aspects is emphasized throughout the research: the recovery and adaptation of solar energy, followed by its transmission without the need for a physical electrical connection. The proposed system involves the retrieval of solar energy, its subsequent adaptation for wireless transmission, reception without direct electrical contact, and the final utilization of the harvested energy to power intelligent sensors. This holistic approach aims to provide a comprehensive understanding of the wireless energy transfer process and its practical implementation in the context of smart sensor applications.

This paper describes the development and design of an intelligent system for controlling the internal climate of the agricultural greenhouse in order to reduce the adverse effects that influence plant growth. This system is the basis of the ESP32 module. This module allows the acquisition and the transmission of intelligent sensor measurements (temperature, soil moisture and sunshine) to a LabVIEW interface and thus the control of ventilation and irrigation (ventilator, solenoid valve) in real time and remotely via an Android application. In fact, the ESP32 ensures the connection of all objects in the system to a Wi-Fi network. Consequently, these types of cards are suitable for the Internet of Things.