Values not saved when using MQTT

[BSUN_RO]

Hi, I am using the MQTT template to subscribe to MQTT values, but when I query for property history I only get the values which I set manually. I think it's a permission problem. Any help is appreciated. Thank you!

[PaiChung]

Do you have the 'DataChange' for the MQTT mapped property set to Always?

(Besides that, is it logged)

[BSUN_RO]

Yes, it's set to Always. I set also Persist and Log.

[PaiChung]

Not too sure then what the issue might be, as an alternative you can log it from a subscription to the datachange?

[BSUN_RO]

Not sure how to do this, but I will look for it.

[PaiChung]

Are you using a subscription right now to process the incoming messages?

If so, then at the same time you can do 'AddStreamEntry' (regular stream) or even ... i forget the service name, but an add to the ValueStream

[BSUN_RO]

Yes, it's a subscription. I will check. Thank you.

[BSUN_RO · Accepted solution]

I found the answer in this articles.

https://community.ptc.com/t5/ThingWorx-Developers/DataChange-Problem-with-

Subscription/td-p/709944

https://www.ptc.com/en/support/article/CS270968