A Low-Cost IoT-Driven Reuse of Condensate Water for Automated Plant Irrigation

Caio Rangel Fernandes, Marcio Moreira Do Nascimento Filho, Filipe Oliveira De Saldanha Da Gama, Rafael Senra Donner Jorge, Rigel Procópio Fernandes, Thiago Silva de Souza, Clayton Jones Alves Da Silva

DOI: 10.14209/sbrt.2025.1571157370

Evento: XLIII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais (SBrT2025)

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Abstract

In this undergraduate paper, we present the implementation of an automated irrigation system for low-cost household plants. The system leverages water collected from air conditioner condensation as its primary irrigation source, promoting sustainable water reuse. We used a moisture sensor inserted 5 cm into the soil, connected to an ESP32, which collects moisture data and sends it to a broker via the MQTT protocol. The aim of this article is to demonstrate the system's operation and its applications, benefits, and limitations. The analysis provides a clearer understanding of how emerging technologies can be used to optimize plant care, promoting efficiency in water resource usage, particularly through the repurposing of otherwise wasted condensate water.

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