Abstract Monitoring equipment for plant-factory automation requires big capital investments. Low-cost open-source microcontroller platforms have been employed in agriculture to monitor and control different variables of importance for crop production. A low-cost plant-factory monitoring system for measuring air temperature, relative humidity, plant-leaf temperature, pH, electrical conductivity, dissolved oxygen and temperature of the nutrient solution is presented here. All the information is recorded in a micro SD memory and can be accessed by Bluetooth in real-time. The developed system was tested during a cycle of a lettuce crop in a research plant-factory facility. The quality of the collected data was evaluated and compared with a well-known research-grade monitoring system. The low-cost sensors showed an easy to correct bias when were compared to those of research-grade, with a correlation coefficient over 0.96. The results showed that low-cost systems, like the one implemented here, are a good alternative for monitoring environmental and physiological variables in controlled environmental agriculture facilities.

中文翻译：

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一种低成本传感器网络的设计和实现，用于监测植物工厂的环境和农艺变量

摘要 工厂自动化监控设备需要大量资本投资。低成本开源微控制器平台已被用于农业，以监测和控制对作物生产具有重要意义的不同变量。这里介绍了一种用于测量空气温度、相对湿度、植物叶片温度、pH 值、电导率、溶解氧和营养液温度的低成本植物工厂监测系统。所有信息都记录在微型 SD 存储器中，可以通过蓝牙实时访问。开发的系统在研究植物工厂设施中的生菜作物周期中进行了测试。对收集到的数据的质量进行了评估，并与著名的研究级监测系统进行了比较。与研究级传感器相比，低成本传感器显示出易于校正的偏差，相关系数超过 0.96。结果表明，像这里实施的那样，低成本系统是在受控环境农业设施中监测环境和生理变量的良好替代方案。