Precision farming applications are often data centric and aim collecting data from a set of sensor modules to be delivered to the central computer. For this aim, the ISO 11783 protocol which uses the Controller Area Network (CAN) as a data link protocol to perform the data communication are used to standardize and provide the serial data communication as wired between the various sensor modules and the central computer a plug/play approach. Many different types of sensors may use to collect temporal and spatial variability in precision farming applications. Especially GPS receivers are the most important sensor in a precision farming application. And also, different data bus protocols can be used for collected data transmission to the central computer. In this context, wireless sensor protocols, especially ZigBee, is gaining popularity for managing precision farming through real-time monitoring of agricultural variability. Various parameters in the precision farming can be monitored and controlled using ZigBee communication integrated with the CAN bus. In this paper, integration of the wired CAN Bus and ZigBee communication was designed, developed and implemented. In this system, the data regarding the geographical coordinate is extracted from the GPS receiver with the help of the ZigBee communication and send it to a central computer with the help of wired CAN Bus. This method has been implemented in order to adapt the ZigBee messages to the CAN Bus and reduce wire using. Finally, the data flow within designed system between CAN and ZigBee data frames was described. In this study, multiple CAN frames usage and handshaking mechanism are explained for sending sensor data longer than 64 bits. This system’s advantage is not only reduce cabling cost and increase the communication speed but also provide dynamic, flexible and applicable communication in precision farming applications.

中文翻译：

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基于ZigBee的GPS接收器与CAN网络的集成，用于精准农业应用

精确耕作应用程序通常以数据为中心，目的是从一组传感器模块收集数据以传递到中央计算机。为了这个目的，使用ISO 11783协议（该协议使用控制器局域网（CAN）作为数据链接协议来执行数据通信）用于标准化并提供串行数据通信，如各种传感器模块和中央计算机之间的有线连接。 / play方法。在精密耕作应用中，许多不同类型的传感器可用于收集时间和空间变异性。尤其是GPS接收器是精确农业应用中最重要的传感器。而且，可以使用不同的数据总线协议将收集的数据传输到中央计算机。在这种情况下，无线传感器协议，尤其是ZigBee，通过实时监控农业变异性，在管理精确农业方面越来越受欢迎。可以使用集成有CAN总线的ZigBee通信来监视和控制精确耕作中的各种参数。本文设计，开发和实现了有线CAN总线和ZigBee通信的集成。在该系统中，借助ZigBee通信从GPS接收器中提取有关地理坐标的数据，并借助有线CAN总线将其发送到中央计算机。为了使ZigBee消息适应CAN总线并减少布线使用，已实施了此方法。最后，描述了在设计的系统中CAN和ZigBee数据帧之间的数据流。在这个研究中，说明了用于发送长度超过64位的传感器数据的多种CAN帧用法和握手机制。该系统的优势不仅在于降低布线成本并提高通信速度，而且还可以在精密农业应用中提供动态，灵活且适用的通信。