IOT FOR AGRICULTURAL USE: DEVELOPMENT OF LOW-COST AUTONOMOUS DEVICE FOR REAL-TIME WEATHER MONITORING

Abstract

Water scarcity is one of the main difficulties faced worldwide, and irrigation monitoring can allow efficient use of this vital asset. As a solution for farming monitoring, this study proposed the development of a low-cost sensor module, combining the Internet of Things (IoT) and Long Range (LoRa). The solar-powered and waterproofed prototype monitors air temperature, humidity, and soil moisture. The device presented a low manufacturing cost, reaching savings of up to R$750 ($145) compared to off-the-shelf solutions. To test the prototype, we monitored a point in an irrigated plantation for 30 days. After implementing level alerts for the monitored variables, we observed the data using computers and mobile devices. Despite significant rainfall, the test presented 97% efficiency in radio transmissions with the device at a distance of 163 meters from the gateway. Therefore, demonstrating good resilience to local weather conditions. In conclusion, the device was considered economical, practical, and reliable for field weather monitoring, showing the possibility of using inexpensive IoT in agricultural applications.