Paper Contents
Abstract
This paper presents the design, implementation, and performance evaluation of a low-power end device based on the ESP32 microcontroller and LoRa-E5 modem for remote environmental monitoring. The proposed system integrates a BMP280 sensor to measure temperature and pressure, encodes readings into a compact hexadecimal payload, and transmits via LoRaWAN at ten-minute intervals. Deep-sleep and sensor sleep modes are leveraged to achieve ultra-low power consumption between transmissions. Laboratory tests demonstrate reliable network joining, message delivery, and accuracy within 0.5C for temperature and 1hPa for pressure. Battery voltage is monitored via AT+VDD, mapped to a 20100% scale, and included in the payload. Deep-sleep cycles of 10minutes yield an average power draw of under 20A in sleep mode, extending battery life for over six months on a 2000mAh cell. The results confirm that the ESP32LoRa-E5 platform provides a costeffective, scalable solution for sustainable IoT deployments.
Copyright
Copyright © 2025 THAMIZHARASAN B. This is an open access article distributed under the Creative Commons Attribution License.
