Wireless Communication System with High Data Flow using an ESP32-Based Interface

This paper proposes a bidirectional communication system designed to handle fast wireless data exchange between an active sensor (AS) based on the ESP32 and an application installed on a personal computer (PC). The data flow is increased by using an additional ESP32 as a computer interface (CI), which is connected to the PC via a USB cable. Data exchange between the ESP32 devices is achieved using the ESP-NOW protocol, developed by the Espressif team. This protocol allows for fast interconnection and data streaming, with the created Wi-Fi network being invisible to other devices. First, the data flow was tested using an MPU6050 sensor, the ESP32’s analog-to-digital converter, and internally generated data, in order to differentiate the data flow based on the source of data acquisition. Second, a UAV arm was simulated. The AS sends MPU6050 sensor data to the PC via the CI, and the PC processes the data and responds with a PWM value to adjust the arm's position to a specific angle. Tests revealed that an increased data flow enables accurate control without the need for complex control techniques. Additionally, the system can be useful in other applications requiring fast wireless data exchange for process control, particularly in research environments. The only requirement for the PC software is to support a serial connection via USB.