Wireless Stethoscope System Based on Embedded Software

Cardiopulmonary diseases pose a severe threat to human health, driving the digital innovation of auscultation technology. Traditional stethoscopes suffer from limitations such as non-real-time monitoring and non-storable data. This study designs and implements a wireless stethoscope system based on embedded software, integrating analog electronics, microcontroller technology, and modern network communication technology to construct a portable hardware acquisition device and a Web real-time display platform with high signal-to-noise ratio and low distortion. The hardware uses STM32F405 as the main controller, combined with VS1053 audio codec chip and ESP8266 WIFI module, enabling 16-bit mono, 8kHz sampling rate acquisition of heart and breath sounds and wireless transmission via TCP protocol. The software, developed with embedded C language, SpringBoot, and React framework, achieves real-time processing, parsing, storage, and waveform visualization of audio data. Tests show that the system has an audio acquisition delay ≤3 seconds, a similarity of 0.95 with standard audio, and realizes heart sound denoising through wavelet transform algorithm, effectively improving clinical diagnostic data quality. This system provides a practical solution for remote auscultation, medical resource optimization, and cardiopulmonary sound research, demonstrating significant application prospects and social value.