codesys mqtt publish serialization

2024-06-05T19:25:17.715000Z

pbPaylod is a pointer, which it expects to point at a STRING. If you point it at an address holding a different data type, it will just assume those bytes are part of a string and likely trundle along memory until it finds a null byte (0x00) that would normally signify the end of a string

PublishMessage := BOOL_TO_STRING(boolVariable);

codesys mqtt publish serialization

2024-03-26T17:40:52.681000Z

Did you get any Luck? I am on same boat. Can you please share your latest Snip.

Thank you

codesys mqtt publish serialization

2024-03-26T17:40:49.023000Z

Did you get any Luck? I am on same boat. Can you please share your latest Snip.

Thank you

codesys mqtt publish serialization

2024-02-16T21:52:22.721000Z

Hello,

I am using the CODESYS IIoT Libraries SL MQTT Publish. Does this publish block only support publishing STRINGS as a readable format?

I can publish ENUM, STRUCT, BOOL; however, MQTT Explorer will only display strings. When I use Wireshark, I can see that it is publishing something, but it looks to be publishing a serialized version which is a bunch of 0s or random text.

If so, is there any way to deserialize this information back into a readable format? See pictures, where I have a BOOL TRUE that gets published as 001. Then see where I publish a STRUCT and it's an incomprehensible combination of 0s - only the string variable is displayed.

Or, is it expected that you convert everything to a string before publishing?

Any help is greatly appreciated! :)

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