[BUG] Write method doesn't allow!

[zlwjzf]

Describe the bug After kepware is connected to an Omron device and the opcua configuration of kepware is enabled, the tb-gateway is connected through the opcua protocol. Point values can be collected but cannot be modified. (The test point has read and write permissions)

opcua.json：

{ "server": { "name": "OPC-UA-Test1", "url": "42.64.26.253:49320", "timeoutInMillis": 5000, "scanPeriodInMillis": 5000, "disableSubscriptions": false, "subCheckPeriodInMillis": 100, "showMap": true, "security": "Basic128Rsa15", "identity": { "username": "username", "password": "password" }, "mapping": [ { "deviceNodePattern": "${ns=2;s=SM1.GJYB}", "deviceNamePattern": "GJYB", "deviceTypePattern": "GJYB", "attributes": [], "timeseries": [ { "key": "Z1_ZA1_ONI", "path": "${ns=2;s=SM1.GJYB.Z1_ZA1_ONI}" }, { "key": "Z1_ZA1_ONO", "path": "${ns=2;s=SM1.GJYB.Z1_ZA1_ONO}" } ] } ] } }

tb-gateway log： ` - |DEBUG| - [opcua_connector.py] - opcua_connector - datachange_notification - 661 - [SUBSCRIPTION] Data to ThingsBoard: {'deviceName': 'GJYB', 'deviceType': 'GJYB', 'attributes': [], 'telemetry': [{'ts': 1719391815118, 'values': {'Z1_ZA1_ONO': 'False'}}]}"

• |DEBUG| - [opcua_connector.py] - opcua_connector - __search_node - 560 - Looking for node with config"
• |DEBUG| - [opcua_connector.py] - opcua_connector - __search_node - 565 - Found in ns=2;s=SM1.GJYB.Z1_ZA1_ONO"
• |ERROR| - [opcua_connector.py] - opcua_connector - server_side_rpc_handler - 303 - Write method doesn't allow!"`

operation procedure： Calls the rpc-v-2-controller interface in swagger-ui with the following parameters: { "method": "set", "params": "ns=2;s=SM1.GJYB.Z1_ZA1_ONO;value=true" , "persistent": true, "timeout": 5000 }

Versions (please complete the following information):

• OS: [windows7 docker]
• Thingsboard IoT Gateway version [3.1]
• Python version[e.g. 3.7]

[zlwjzf]

Hello, I have found the cause of the problem. When calling the RPC set method, replace node.set_value(value) in the source opcua_connector.py file with the following code to achieve the simulated opcua point in kepware to write values dv = ua.DataValue(ua.Variant(int(value), ua.VariantType.Int16)) dv.ServerTimestamp = None dv.SourceTimestamp = None node.set_value(dv) Can you adapt these changes to the latest version?

[zlwjzf]

https://github.com/FreeOpcUa/opcua-asyncio/issues/30

[shanjunying]

I also encountered the same problem, writing to the opcua service provided by kepserver resulted in the error "opcua. ua. uaerrors. auto. BadWriteNotSupported:" The server does not support writing the combination of value, status, and timestamps provided. "(BadWriteNotSupported) but writing to the service provided by Prosys OPC UA Simulation Server did not cause any problems

[shanjunying]

dv = ua.DataValue(ua.Variant(int(value), ua.VariantType.Int16)) dv.ServerTimestamp = None dv.SourceTimestamp = None node.set_value(dv)

Where should these codes be added？Please tell me, thank you！

[zlwjzf]

thingsboard_gateway/connectors/opcua/opcua_connector.py In method server_side_rpc_handler if rpc_method == 'get': self.__gateway.send_rpc_reply(content['device'], content['data']['id'], {content['data']['method']: node.get_value(), 'code': 200}) else: ...... Load in else