Authors

Abstract

This paper describes the design and implementation of a wireless sensor based on NB-IoT (Narrow Band Internet of Things) for monitoring agricultural environmental information. The sensor is capable of real-time monitoring of four environmental parameters, including ambient temperature, relative humidity, illuminance, and CO2 concentration. In the hardware design, sensor elements are selected based on the measurement ranges and accuracies specified in agricultural environmental monitoring industry standards. The hardware circuit is designed using the BC35-G type NB-IoT module and STM32 MCU (Microcontroller Unit). In the software design, data from the environmental parameters are collected and processed by the STM32 MCU and sent to the OneNET cloud platform through the NB-IoT module. The OneNET cloud platform enables users to view the relevant environmental data collected by the sensors using mobile phones and other mobile terminals. To test the effectiveness of the developed sensors, they were tested in a glass greenhouse at Fuyang Ziqing Agricultural Technology Co., Ltd. in Anhui Province. The results demonstrate that the sensors can accurately collect the data of relevant environmental parameters and can provide stable wireless transmission of data remotely, making them suitable for practical engineering applications. In summary, this wireless remote monitoring sensor based on NB-IoT represents a significant advancement in the field of agricultural automation. The sensor's ability to accurately monitor and wirelessly transmit data in real-time provides farmers with valuable information to optimize crop growth and maximize yields.

Abstract in Chinese

窄带物联网是一种新兴无线通信技术，具有通信质量高、传输距离远等优点。基于窄带物联网技术，设计了一款面向农业环境信息监测的无线传感器。该传感器能够实时监测环境温度、相对湿度、光照度和CO2浓度这四种环境参数的信息。在传感器的硬件设计方面，首先根据农业环境监测行业标准对各环境参数的测量范围和测量精度等指标的要求，选择了合适的传感器元件。然后，以BC35-G型号的NB-IoT模块和STM32单片机为核心设计了硬件电路。在软件设计方面，由STM32 单片机完成各环境参数的采集和处理，并通过NB-IoT模块把数据发送至ONENet云平台。用户通过手机等各类移动终端连接该云平台，即可查看相关环境数据。在安徽省阜阳市紫青农业科技股份有限公司一座玻璃温室内对所设计的传感器进行了验证。测试结果表明，所设计的传感器能够准确采集相关环境参数，且能实现数据的稳定无线传输，满足工程实际应用。