Delay Performance Analysis of a Multi-Client ESP32 Soft-AP IoT Network Using an Adaptive Transmission Interval Method

Imran Lubis

doi:10.59934/jaiea.v5i3.2480

Authors

Imran Lubis Universitas Harapan Medan

DOI:

https://doi.org/10.59934/jaiea.v5i3.2480

Keywords:

Adaptive Transmission Interval, ESP32 SoftAP, Internet of Things, Delay, Quality of Service, Packet Delivery Ratio

Abstract

This study proposes a delay-based Adaptive Transmission Interval (ATI) method to improve communication performance in IoT networks utilizing an ESP32 Multi Client SoftAP architecture. The system consists of one ESP32 functioning as an Access Point and gateway, and three ESP32 client nodes that transmit sensor data from DHT22 sensors via a local Wi-Fi network. Network performance was evaluated using Quality of Service (QoS) parameters, including delay, packet loss, and Packet Delivery Ratio (PDR). The ATI method dynamically adjusts the data transmission interval based on the measured Round Trip Time (RTT) values.

Experimental results obtained from a 30-minute testing period showed that 5,391 out of 5,400 data packets were successfully received, resulting in a packet loss rate of 0.17% and a PDR of 99.83%. Furthermore, ATI successfully reduced the average delay from 245.77 ms to 140.10 ms, representing a 42.99% improvement in communication performance compared to the conventional Fixed Transmission Interval (FTI) method. These findings demonstrate that ATI is effective in reducing network congestion, enhancing communication stability, and optimizing ESP32 performance in multi-client IoT environments.

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