Vol. 25, No. 1 (2026), Sim26663 https://doi.org/10.24275/rmiq/Sim26663

Development of a low-cost virtual instrumentation prototype for coffee roasting based on the Internet of Things (IoT)

 

Authors

O. E. Guijarro-Rubio, D. R. Vinocunga-Pillajo, J. G. Padilla-Padilla, J. H. Granja-Ponce, O. Del Real, E. Guardado-Yordi, J. P. Pico-Poma, D. A. Sarabia-Guevara, A. Pérez-Martínez

Abstract

Implementing an instrumentation system in the coffee roasting process can help to improve the quality of the coffee produced by small-scale farmers in the Ecuadorian Amazon region. The proposed system aimed to design and implement a low-cost device capable of monitoring the coffee roasting process locally or remotely by applying Internet of Things (IoT) technology. The implemented IoT architecture was based on a model that integrates a data acquisition unit (DAQ), a main control unit (MCU), an IoT communication protocol, and a software-defined network (SDN) that connects the IoT broker, nodes, data server, Internet access gateway, and end-user devices. As a result, a low-cost virtual instrumentation system based on IoT technology was implemented, which enabled the publication of process variables acquired by the DAQ to the Mosquitto IoT broker through the Message Queuing Telemetry Transport (MQTT) protocol. These variables were stored in the InfluxDB time-series database and visualized through a dashboard designed in Node-RED and Grafana.

Keywords

Broker; Coffee roasting; IoT; MQTT.

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