物联网实验教程(物联网实验平台)

 

[小 迪 导读]：本教程在掌握基础modbusRTU标准协议概念和业务流程之后，通过真实的支持ModbusRTU标准协议的设备和DTU来进行实战演练。

系统需要使用两个设备以及若干导线：

温湿度传感器：采用的是SHT20传感器 Modbus工业级DTU：采用的是有人的口红CAT-1 DTU DR154

系统架构逻辑图如下，包括设备模拟，通道通信，模型设置，应用显示部分

操作步骤：

1.设备接线

电表信息

SHT20传感器

DTU信息

dtu图片

操作步骤

SHT20传感器连接电源

SHT20传感器根据端口图正负连接电源正负，电源可以选用电源适配器。

DTU连接电源

根据DTU上的端口图,红色线(电源线)连接DC+,黑色线(地线)连接DC-

连接DTU和SHT20传感器

根据端口图,SHT20传感器的A端口连接DTU端口的RX(A),SHT20传感器的B端口连接DTU端口的TX(B)

说明RX为接收,TX为发送

2.dtu配置

1.DTU正面二维码下方标识正负极连接电源，A,B端连接电表，到开手机微信扫码，扫描DTU二维码进入小程序，打开蓝牙连接与DTU背部IMEI相同编号的蓝牙，进入连接，密码为usr_cn。

2.打开参数设置，设置工作模式：地址设为部署的平台地址；端口号设为20111。

互联网小常识：分布式内存访问技术是将对称多处理技术（SMP）与集群技术结合起来，用于多达64个或更多的CPU的服务器之中，以获得更高的性价比。

说明地址为服务器地址，端口号为服务器端口号，若无自己的物联网服务器，可选择地址:prod.dgiotcloud.cn，端口号设为20111警告设置dtu时，工作模式设置完后需保存再设置串口，不能一次性设置，一次性设置会导致设置不完全

勾选注册包功能，注册包数据类型选择IMEI码，将会自动生成一个IMEI码。

3.打开参数设置，设置串口设置：波特率设为9600，校验位选择NONE。

说明支持ModbusRTU的设备：参数可以询问商家或者商品介绍获取设备的参数

3.创建采集通道

1.创建ModbusRTU采集通道。位置在通道管理-创建通道

2.选择Modbus采集通道并配置

3.产品添加通道后需对通道进行重启

4.通道日志查看

5.创建产品

1.要连接ModbusRTU，创建一种产品即可2.创建产品

ModbusRTU

3.产品物模型配置将以下物模型代码直接复制即可ModbusRTU

{"events": [],"properties": [ {"accessMode":"r","dataForm": {"address":"0X10","afn":"","byteType":"","bytelen":"","collection":"%%humid/10","control":"%d","countcollection":"%s","countround":"all","countstrategy": 20,"da":"","data":"null","dt":"","iscount":"0","offset": 0,"operatetype":"readCoils","order": 0,"originaltype":"short16_AB","protocol":"MODBUSRTU","rate": 1,"round":"all","slaveid":"0X10","strategy":"计算值"},"dataSource": {"": [],"_dlinkindex":"","address":"1","dis": [ {"data":"2","key":"0000","undefined":"0000"} ],"operatetype":"readIregs","originaltype":"short16_AB","registersnumber":"1","slaveid":"temp_humid"},"dataType": {"das": [],"specs": {"max": 100,"min": 0,"precision": 3,"step": 0,"unit":"%"},"type":"float"},"devicetype":"温湿度传感器","identifier":"humid","index": 0,"isaccumulate":false,"isshow":true,"isstorage":true,"moduleType":"properties","name":"湿度","required":true,"updateAt":"1659081134998"}, {"accessMode":"r","dataForm": {"address":"0X10","afn":"","byteType":"","bytelen":"","collection":"%%temp/10","control":"%d","countcollection":"%s","countround":"all","countstrategy": 20,"da":"","data":"null","dt":"","iscount":"0","offset": 0,"operatetype":"readCoils","order": 0,"originaltype":"short16_AB","protocol":"MODBUSRTU","rate": 1,"round":"all","slaveid":"0X10","strategy":"计算值"},"dataSource": {"": [],"_dlinkindex":"","address":"0","dis": [ {"data":"2","key":"0000","undefined":"0000"} ],"operatetype":"readIregs","originaltype":"short16_AB","registersnumber":"1","slaveid":"temp_humid"},"dataType": {"das": [],"specs": {"max": 100,"min": -100,"precision": 3,"step": 0,"unit":"℃"},"type":"float"},"devicetype":"温湿度传感器","identifier":"temp","index": 1,"isaccumulate":false,"isshow":true,"isstorage":true,"moduleType":"properties","name":"温度","required":true,"updateAt":"1659081126141"}, {"accessMode":"r","dataForm": {"address":"0X10","afn":"","byteType":"","bytelen":"","collection":"%s","control":"%d","countcollection":"%s","countround":"all","countstrategy": 20,"da":"","data":"null","dt":"","iscount":"0","offset": 0,"operatetype":"readCoils","order": 0,"originaltype":"short16_AB","protocol":"MODBUSRTU","rate": 1,"round":"all","slaveid":"0X10","strategy":"3"},"dataSource": {"": [],"_dlinkindex":"","address":"0X0001","dis": [ {"data":"2","key":"0000","undefined":"0000"} ],"operatetype":"readIregs","originaltype":"bit","registersnumber":"2","slaveid":"0X01"},"dataType": {"das": [],"specs": {"max": 10000000000000000,"min": 0,"precision": 3,"step": 0,"unit":""},"type":"int"},"devicetype":"温湿度传感器","identifier":"temp_humid","index": 2,"isaccumulate":false,"isshow":false,"isstorage":false,"moduleType":"properties","name":"温湿度","required":true,"updateAt":"1656584724858"} ],"services": [],"tags": [] }COPY

4.如何复制物模型

在产品管理-配置-物模型-查看物模型处

将物模型代码复制粘贴即可

互联网小常识：SNMP优点：简单，易于实现、支持广泛、操作原于简捷、性能高。缺点：SNMP建立在无连接的传输协议之上，另外它是非面向对象的，不支持分布式管理。

复制完后可以点击编辑查看配置情况，dgiot针对modbusRTU多个数据的情况提供一次性全部读取的方案。

负责采集的物模型的下方数据来源与设备参数配置的一致

6.SHT20传感器设备连接的DTU注册成功

1.SHT20传感器设备连接的DTU注册成功

2.SHT20传感器设备连接的DTU上线成功

3.设备地图显示成功

7.ModbusRTU数据采集成功

1.SHT20传感器实时数据

2.ModbusRTU历史数据

[小 迪 提醒]没有多个数据的modbusRTU设备的用户可以使用虚拟modbus软件自行模拟。虚拟modbus连接点击了解详情。

[小 迪 点评]

dgiot支持ModbusRTU协议的设备接入，有真实设备的用户尝试进行设备接入演练。真实设备的接入针对新手玩家，dgiot的接线步骤将会提供很大的帮助。

想了解更多 dgiot 的具体细节，欢迎大家在GitHub上查看相关源代码。

互联网小常识：DNS服务器配置的主要参数：正向查找区域、反向查找区域、资源记录和转发器。

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