Scholarlink

<p>This project develops a long-range wireless communication system for remote or disaster-stricken areas, utilizing ESP32-based mesh networks with a custom high-gain helical antenna. The antenna, optimized for the 2.4 GHz band through MATLAB and ANSYS HFSS simulations, was integrated with ESP32-WROOM-32UE modules. The system, programmed with ESP-IDF, supports offline file transfers via FTP and HTTP, with encryption and authentication for security. While the built-in PCB antenna of the ESP32 typically provides a limited range of about 50&#xa0;m under line-of-sight (LOS) conditions, the custom helical antenna extended the communication range to 1.2 km in LOS and 400&#xa0;m in non-line-of-sight (NLOS) environments. The mesh network demonstrated reliable, secure, and efficient data exchange in multi-node configurations without internet access. This system offers a scalable solution for resilient wireless communication in disaster response, rural areas, field research, and IoT applications.</p>

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Designing and implementing an antenna on ESP32 for mesh network internet access and offline file transfer

  • 期刊论文

  • 发表日期：

    2026年5月5日

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  • Ayush Jha,
  • Vaishnavi Shripati,
  • Prativa Saraswala,
  • Farah M. Pathan

摘要

This project develops a long-range wireless communication system for remote or disaster-stricken areas, utilizing ESP32-based mesh networks with a custom high-gain helical antenna. The antenna, optimized for the 2.4 GHz band through MATLAB and ANSYS HFSS simulations, was integrated with ESP32-WROOM-32UE modules. The system, programmed with ESP-IDF, supports offline file transfers via FTP and HTTP, with encryption and authentication for security. While the built-in PCB antenna of the ESP32 typically provides a limited range of about 50 m under line-of-sight (LOS) conditions, the custom helical antenna extended the communication range to 1.2 km in LOS and 400 m in non-line-of-sight (NLOS) environments. The mesh network demonstrated reliable, secure, and efficient data exchange in multi-node configurations without internet access. This system offers a scalable solution for resilient wireless communication in disaster response, rural areas, field research, and IoT applications.