channel-opc-ua
介绍
通道服务名：channel-opc-ua
工程名称：fox-edge-server-channel-opc-ua
说明：opc-ua通道服务器，作为OPC-UA的客户端，跟OPC-UA的服务端进行通信的场景。
OPC-UA是OPC基金会为脱离OPC对Windows的依赖而改进的技术，使得它能够在Linux上进行技术实现。
有些设备是基于OPC-UA实现了服务端的特性，可以使用OPC-UA进行访问。
针对这个业务场景，灵狐开发了opc-ua这种通道服务，来支持该场景。
组网
源码
- fox-edge-server-channel-opc-ua
操作方法
该服务的操作方法，只有半双工的exchange两种模式。
1、通道配置
opc-ua通道配置，要进行证书配置，那么fox-edge和opc-ua服务器之间进行认证登录。
endpointUrl：是opc-ua服务端提供的连接串信息。
创建一个opc-ua的通道后，在通道中配置连接参数
{
"appUri": "urn:fox-edge:UnifiedAutomation:UaExpert@fox-edge",
"appName": "fox-edge-OpcUaClient",
"certificate": {
"file": "fox-edge-client.pfx",
"path": "",
"alias": "fox-edge-ai",
"dnsName": "fox-edge",
"ipAddress": "192.168.1.9",
"stateName": "GuangDong",
"commonName": "UaClient@fox-edge",
"countryCode": "CN",
"localityName": "fox-edge",
"organization": "fox-edge",
"keystorePassword": "123456",
"organizationUnit": "per"
},
"endpointUrl": "opc.tcp://USER-20221006EY:53530/OPCUA/SimulationServer",
"idpPassword": "",
"idpUsername": "fox-edge"
}
注意事项：服务端提供的endpointUrl如果是包含主机名称的时候，要确保能够ping通该主机名称。 在windows环境下，操作系统是默认开启局域网ip和hostname的发现关系的，所以不需要进行相应的操作系统配置，即可通过opc-ua跟对方windows主机进行通信。 但是在linux环境下，是没有开启局域网的ip和hostname的发现的，需要手动去/etc/hosts手动添加该ip和hostname，fox-edge才能对windows服务端进行正常访问。
在Linux下编辑/etc/hosts文件，配置IP和hostname的映射关系，保存配置后，可以ping通hostname了，fox-edge在linux下，也马上就可与windows的模拟器通信了
2、启动模拟器
prosys opc ua是一个非常易用的windows下的opc-ua模拟器，可以方便进行测试。
可以看到，它提供了一个连接串，而且它的连接传是一个主机名而不是IP，它是以主机名hostname的方式进行提供服务的。
fox-edge部署在Linxu的时候，就涉及到IP-hostname之间的配置，如何配置，参考上一段说明。
3、通道操作任务
创建一个通道操作任务，进行跟opc-ua模拟器的连接测试，可以发现通信上了，并读取到了数据
4、配置范例
1、通道配置
{
"appUri": "urn:fox-edge:UnifiedAutomation:UaExpert@fox-edge",
"appName": "fox-edge-OpcUaClient",
"certificate": {
"file": "fox-edge-client.pfx",
"path": "",
"alias": "fox-edge-ai",
"dnsName": "fox-edge",
"ipAddress": "192.168.1.9",
"stateName": "GuangDong",
"commonName": "UaClient@fox-edge",
"countryCode": "CN",
"localityName": "fox-edge",
"organization": "fox-edge",
"keystorePassword": "123456",
"organizationUnit": "per"
},
"endpointUrl": "opc.tcp://USER-20221006EY:53530/OPCUA/SimulationServer",
"idpPassword": "",
"idpUsername": "fox-edge"
}
2、通道操作任务配置范例
- 读数据：browseChildValue
发送报文
{
"nodeId": {
"namespace": 3,
"identifier": "85/0:Simulation"
},
"operate": "browseChildValue"
}
返回报文
{
"type": "opc-ua",
"uuid": "12e89eb0-eb90-4a70-a0cb-84c05b864d07",
"name": "channel-opc-ua-2",
"mode": "exchange",
"send": {
"nodeId": {
"namespace": 3,
"identifier": "85/0:Simulation"
},
"operate": "browseChildValue"
},
"recv": {
"name": "",
"nodeId": {
"namespace": 3,
"identifier": "85/0:Simulation"
},
"value": null,
"children": [
{
"name": "Counter",
"nodeId": {
"namespace": 3,
"identifier": "Counter"
},
"value": 30,
"children": []
},
{
"name": "Expression",
"nodeId": {
"namespace": 3,
"identifier": "Expression"
},
"value": 0.8109561618781576,
"children": []
},
{
"name": "Random",
"nodeId": {
"namespace": 3,
"identifier": "Random"
},
"value": -1.642301582707593,
"children": []
},
{
"name": "Sawtooth",
"nodeId": {
"namespace": 3,
"identifier": "Sawtooth"
},
"value": 0.7999999523162842,
"children": []
},
{
"name": "Sinusoid",
"nodeId": {
"namespace": 3,
"identifier": "Sinusoid"
},
"value": -1.9890437904381266,
"children": []
},
{
"name": "Square",
"nodeId": {
"namespace": 3,
"identifier": "Square"
},
"value": -2,
"children": []
},
{
"name": "Triangle",
"nodeId": {
"namespace": 3,
"identifier": "Triangle"
},
"value": -1.8666666648491703,
"children": []
}
]
},
"timeout": 5000,
"route": "topic_channel_respond_manager",
"msg": "",
"code": 200
}
- 读节点信息：browseChild
发送报文
{
"nodeId": {
"namespace": 3,
"identifier": "85/0:Simulation"
},
"operate": "browseChild"
}
返回报文
{
"type": "opc-ua",
"uuid": "ee22a215-616d-41b2-8c04-7dfdfc2cffe8",
"name": "channel-opc-ua-2",
"mode": "exchange",
"send": {
"nodeId": {
"namespace": 3,
"identifier": "85/0:Simulation"
},
"operate": "browseChild"
},
"recv": {
"name": "",
"nodeId": {
"namespace": 3,
"identifier": "85/0:Simulation"
},
"value": null,
"children": [
{
"name": "Counter",
"nodeId": {
"namespace": 3,
"identifier": "Counter"
},
"value": null,
"children": []
},
{
"name": "Expression",
"nodeId": {
"namespace": 3,
"identifier": "Expression"
},
"value": null,
"children": []
},
{
"name": "Random",
"nodeId": {
"namespace": 3,
"identifier": "Random"
},
"value": null,
"children": []
},
{
"name": "Sawtooth",
"nodeId": {
"namespace": 3,
"identifier": "Sawtooth"
},
"value": null,
"children": []
},
{
"name": "Sinusoid",
"nodeId": {
"namespace": 3,
"identifier": "Sinusoid"
},
"value": null,
"children": []
},
{
"name": "Square",
"nodeId": {
"namespace": 3,
"identifier": "Square"
},
"value": null,
"children": []
},
{
"name": "Triangle",
"nodeId": {
"namespace": 3,
"identifier": "Triangle"
},
"value": null,
"children": []
}
]
},
"timeout": 5000,
"route": "topic_channel_respond_manager",
"msg": "",
"code": 200
}