Calling Methode returns payload with [Type not printable]

[Stabsauger]

Hello,

im experimenting with a Siemens S7 which acts as a server.

Im calling a method with no input parameter which should return a structure of data (on PLC-Side called udt). I´m doing that like this:

I would like to get it as a JS-object. But when i print the payload in the debug console i get the message [Type not printable]. The rest of the message looks like it should.

In UAExpert the method-call looks like expected:

I'm not sure if this is a issue with node-red-contrib-opcua at all. Maybe im handling the data wrong. Im not sure why i cant access the payload properly. Maybe someone can help me or can tell me who to ask.

Thank you,

Staubsauger

[mikakaraila]

Test with function node "trick", console.log(JSON.stringify(msg.payload.time)); It can be that nested objects are not fully supported in node-red Debug node. As DTL is OPC UA custom type it can be that encoding is just not working...

node-opcua @erossignon could comment this if he has time.

[erossignon]

Try msg.payload.toJSON()

[Stabsauger]

Thank you very much for taking the time.

I tried: -> console.log(JSON.stringify(msg.payload)); -> console.log(msg.payload.toString()); -> console.log(msg.payload.toJSON());

From all i get the same error message (except the function :) ). It does not change if i try to stringify "msg.payload.time"

4 Aug 13:19:46 - [error] [function:json.stringify()] TypeError: Cannot read properties of undefined (reading 'schema')

When i try to print the payload directly:

[Type not printable]typeUnionMyDatatype { selector: 0, name: 'Hello World', number: 12345, time: DTL { YEAR: 2021, MONTH: 5, DAY: 1, WEEKDAY: 7, HOUR: 11, MINUTE: 12, SECOND: 13, NANOSECOND: 0 } }

If I'm interpreting this correctly, the bolded parts are the problem because they don't match the JSON notation? Then I would just have to remove them "by hand" somehow to get a normal object.