Design and Implementation of a Wireless Sensor Network Based on the ESP32 for IoT Applications

This paper provides a general description of the implementation of a sensor network based on the System-on-Chip (SoC) ESP32. The hardware, software solutions, and other components of the designed network are presented. The wireless sensor network consists of sensor nodes and central nodes, which communicate using Wi-Fi, ESP-NOW protocols, and the MQTT protocol designed specifically for IoT devices. The measured data from the nodes are visualized and monitored through the Home Assistant service. The design of the sensor network focuses on creating a robust, low-power, and user-friendly network without relying on third-party devices and solutions. As part of the functionality verification, testing and data visualization were carried out over several months.