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EG边缘计算网关连接中移ONENET物联网平台（MQTT协议）

article 2024/11/16 15:20:09

上文：EG边缘计算网关连接阿里云物联网平台（MQTT协议）

需求概述

本章节主要实现一个流程：EG8200mini采集Modbus RTU数据，通过MQTT协议连接中移ONENET物联网平台

Modbus RTU采集此处不做过多赘述，可参考其他案例（串口读取Modbus传感器数据）介绍。下文默认已经采集到Modbus RTU数据。

要采集的Modbus点位表：

地址(Doc)	数据类型	属性	名称
00001	Boolean	读写	MotorControl1
00002	Uint16	读写	MotorControl2
40001	Uint16	读写	Requency1
40002	Uint16	读写	Requency2

需求分析

网关配置：

第一步：采集Modbus RTU数据

第二步：拼接Json

第三步：MQTT上报并接收平台响应

平台配置：

第一步：添加产品

第二步：添加物模型

第三步：添加设备

第四步：数据展示

需求实现

网关配置

第一步：采集Modbus从机的数据

此处为采集Modbus RTU数据，不在过多赘述，可参考其他案例。采集到Modbus RTU的流程如下：

此处为语雀内容卡片，点击链接查看：Modbus RTU 读数据 · IOTRouter

源码：

[{"id":"d968892da4e40a46","type":"inject","z":"b7c6f1e56286d94a","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"5","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":480,"y":1780,"wires":[["9b935c0dd6a63827","3bc2eb81af744a6d"]]},{"id":"9b935c0dd6a63827","type":"modbusRead","z":"b7c6f1e56286d94a","name":"读线圈","uid":"1","dataType":"1","len":"120","modbus":"f4b98c3be57ddcad","columns":[{"Key":"MotorControl1","Address":"0","Type":"23","Tdata":""},{"Key":"MotorControl2","Address":"1","Type":"23","Tdata":""}],"x":670,"y":1780,"wires":[["de1ce0dfa2e082f8"]]},{"id":"30fa1cad395c11c4","type":"modbusRead","z":"b7c6f1e56286d94a","name":"读频率","uid":"1","dataType":"3","len":"120","modbus":"f4b98c3be57ddcad","columns":[{"Key":"Requency1","Address":"0","Type":"1","Tdata":""},{"Key":"Requency2","Address":"1","Type":"1","Tdata":""}],"x":670,"y":1860,"wires":[["de1ce0dfa2e082f8"]]},{"id":"de1ce0dfa2e082f8","type":"join","z":"b7c6f1e56286d94a","name":"","mode":"custom","build":"merged","property":"payload","propertyType":"msg","key":"topic","joiner":"\\n","joinerType":"str","accumulate":false,"timeout":"0.5","count":"","reduceRight":false,"reduceExp":"","reduceInit":"","reduceInitType":"","reduceFixup":"","x":870,"y":1820,"wires":[["b53287da47908499"]]},{"id":"3bc2eb81af744a6d","type":"delay","z":"b7c6f1e56286d94a","name":"","pauseType":"delay","timeout":"200","timeoutUnits":"milliseconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"allowrate":false,"outputs":1,"x":470,"y":1860,"wires":[["30fa1cad395c11c4"]]},{"id":"b53287da47908499","type":"debug","z":"b7c6f1e56286d94a","name":"调试 254","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":1040,"y":1820,"wires":[]},{"id":"f4b98c3be57ddcad","type":"modbus config","name":"","model":"2","host":"127.0.0.1","port":"502","serialport":"/dev/ttyAS3","baudrate":"115200","databits":"8","stopbits":"1","parity":"none","timeout":"50","reqtimeout":"1000"}]

第二步：拼接Json

参考ONENETonJson协议MQTT数据格式以及平台配置第二步的物模型设置。将网关配置第一步采集的数据JSON格式化：

上行Json示例:

{

"id": "123",

"version": "1.0",

"params": {

"Power": {

"value": "on",

"time": 1524448722123

"WF": {

"value": 23.6,

"time": 1524448722123

}

平台下行反馈Json示例：

{

"id": "123",

"code": 200,

"msg": "xxxx"

}

此处为语雀视频卡片，点击链接查看：onenet上报封装.mp4

源码：

var RS485_RECV = msg.payload
var time = Date.now()


var pid = "31ACZV4snl"
var deviceName = "device001"
var topic = `$sys/${pid}/${deviceName}/thing/property/post`
msg.topic = topic
var mqttSend = {
	"id": "123",
	"version": "1.0",
	"params": {
		"DO1": {
			"value": RS485_RECV.MotorControl1 ? true : false,
			"time": time
		},
		"DO2": {
			"value": RS485_RECV.MotorControl2 ? true : false,
			"time": time
		},
		"frequency1": {
			"value": RS485_RECV.Requency1,
			"time": time
		},
		"frequency2": {
			"value": RS485_RECV.Requency2,
			"time": time
		}
	}
}

msg.payload = JSON.stringify(mqttSend)
return msg;

第三步：MQTT上报

使用MQTT发布节点，参考平台配置第四步的内容填写MQTT连接参数：

pid：产品ID

device-name：设备名称

设备属性上报Topic：$sys/{pid}/{device-name}/thing/property/post

上报响应订阅topic：$sys/{pid}/{device-name}/thing/property/post/reply

此处为语雀视频卡片，点击链接查看：onenet数据上报.mp4

平台配置

第一步：添加产品

进入ONENET物联网平台

产品开发->创建产品：

所属地址：自由选择

节点类型：网关设备

协议类型：MQTT

数据格式：oneJson

联网方式：自定义

开发方案：自定义方案

产品厂商：自定义

产品型号：自定义

品牌名称：自定义

此处为语雀视频卡片，点击链接查看：添加产品.mp4

第二步：添加物模型

产品开发->设置物模型->添加自定义模型：

此处为语雀视频卡片，点击链接查看：添加物模型.mp4

第三步：添加设备

设备接入管理->设备管理->添加设备：

所属产品：选择第一步创建的产品

设备名称：自定义

设备描述：自定义

此处为语雀视频卡片，点击链接查看：ev_20240702_173246.mp4

第四步：激活设备

参考文档MQTT设备连接：

MQTT连接参数：

连接地址:mqtts.heclouds.com
端口:1883
clientId:设备名称
username：产品ID
password：计算后的token(参考下一步说明)

Token计算参考文档Token计算：

res:products/31ACZV4snl                              (规则products/{产品ID})
et:1721859317                                        (失效时间)
key:awGbZ4HLsXkvaxOlixv/642tOZM3dXUzf+Xd6UnV098=     (产品key)

根据上述步骤获取的连接参数：

地址：mqtts.heclouds.com
端口：1883
clientId：device001
username：31ACZV4snl
password：version=2018-10-31&res=products%2F31ACZV4snl&et=1721791062&method=md5&sign=iDH4WvVwIGlpRkFlBC1Eow%3D%3D

将MQTT连接参数配置到MQTT发布节点：

此处为语雀视频卡片，点击链接查看：MQTT-onenet配置.mp4

此时可以看到设备已经在线：

第五步：数据展示

设备管理->详情->属性：

网关触发数据发送，可以看到ONENET物联网平台物模型数据更新：

总结

EG边缘计算网关与中移ONENET物联网平台的无缝对接，用户可以轻松实现对工业设备、传感器等现场设备的远程监控和管理。EG网关负责数据采集和协议转换，ONENET平台提供云端数据处理、分析与可视化，形成了一个高效、稳定的物联网系统。利用MQTT协议的轻量高效特点，确保设备数据能够及时、可靠地上传到云平台，实现工业设备的智能化和远程控制。

更多了解：成都纵横智控

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