添加嵌套的 OPC-UA 变量会导致“字符串无法强制转换为 nodeId”

问题描述

错误：无法将字符串强制转换为 nodeId

嗨，我正忙于使用 opcua iotagent 代理在 Orion broker 和带有 OPC-UA 服务器的 PLC 之间建立连接。我设法设置了所有部分，并且能够接收（测试）数据，但是我无法按照教程使用 json 文件将实体添加到 Orion-broker：

curl http://localhost:4001/iot/devices      -H "fiware-service: plcservice"      -H "fiware-servicepath: /demo"      -H "Content-Type: application/json"      -d @add_device.json

预期的结果是使用提供的数据向 Orionbroker 添加实体，但这只会导致错误消息：

{"name":"Error","message":"String cannot be coerced to a nodeId : ns*4:s*MAIN.mainVar"}

疑似错误

iotagent 是否可能无法很好地处理嵌套变量？

采取的步骤

仔细检查 OPC 数据的可用性：
- OPC 数据每秒都在变化，可以在 broker 日志中看到
降低设置的复杂性，仅包含 broker 和 IOT-agent

附加信息：

add_device.json 文件：

{ 
"devices": [
    {
        "device_id": "plc1","entity_name": "PLC1","entity_type": "plc","attributes": [
            
            {
                "object_id": "ns*4:s*MAIN.mainVar","name": "main","type": "Number"
            }
        ],"lazy": [
        ],"commands" : []
  }
]

}

IOT-agent 的配置（来自 localhost:4081/config）：

{
  "config": {
    "logLevel": "DEBUG","contextbroker": {
      "host": "orion","port": 1026
    },"server": {
      "port": 4001,"baseRoot": "/"
    },"deviceRegistry": {
      "type": "memory"
    },"mongodb": {
      "host": "iotmongo","port": "27017","db": "iotagent","retries": 5,"retryTime": 5
    },"types": {
      "plc": {
        "service": "plcservice","subservice": "/demo","active": [
          {
            "name": "main","type": "Int16"
          },{
            "name": "test1",{
            "name": "test2","type": "Int16"
          }
        ],"lazy": [],"commands": []
      }
    },"browseServerOptions": null,"service": "plc","providerUrl": "http://iotage:4001","pollingExpiration": "200000","pollingDaemonFrequency": "20000","deviceRegistrationDuration": "P1M","defaultType": null,"contexts": [
      {
        "id": "plc_1","type": "plc","service": "plcservice","polling": false,"mappings": [
          {
            "ocb_id": "test1","opcua_id": "ns=4;s=test.Testvar.test1","object_id": null,"inputArguments": []
          },{
            "ocb_id": "test2","opcua_id": "ns=4;s=test.Testvar.test2",{
            "ocb_id": "main","opcua_id": "ns=4;s=MAIN.mainVar","inputArguments": []
          }
        ]
      }
    ]
  }
}

解决方法

我是 iotagent-opcua 存储库的维护者之一，我们已经确定并修复了您要解决的错误，请将您的代理更新到最新版本 (1.4.0)

如果您从未听说过它，从 1.3.8 开始，我们引入了一个名为“relaxTemplateValidation”的新配置属性，它允许您使用以前禁止的字符（例如 = 和 ; ）。建议你看一下提供的配置示例。

fiware fiware-orion opc-ua