Remote Property timestamp on EMS / LUA don't update on value stream

Question

Hello folks,

I have an EMS running on a docker container with ubuntu. With the help of the Lua script two parameters are read (CPU frequency and temperature) and then shared as remote properties with Thingworx.

Then i added a value stream to display the historical data (queryPropertyHistory).My problem is that no history exists. I am also not sure if the values are really updated. The timestamp is always the same (timestamp= start-time Lua service). When I press "save" on the remote thing, the remote properties are reset and after a short wait, new values appear. However, the timestamp remains the same.

I found a post in the forum where another user had a similar problem. (Raspberry-Pi-EMS-Value-Stream/td-p/603659) After editing my utils.lua as described in the post, I get at least a new timestamp/line after "saving the Thing" on the queryPropertyHistory.

I need a correct ValueStream with all historical data.

Attached is my template.lua-file, the lua.log and a screenshot of queryPropertyHistory.

M4RC · Accepted Answer

Hello folks,my values are updated periodically and are also displayed on queryPropertyHistory-Service. I have changed the settings of the remote properties in Thingworx. At Push Type from "Pushed based on value change" to "Always pushed".

M4RC · Answer

Hello,

the problem still exists. I have now set the log to "info" and added an additional log command for the variables (eg. log.info("cpu_temp: ", s) ) in Template.lua.

Attached is the new log. The variables seem to be assigned as desired.

The queryPropertyHistory service still contains no new entries. However, I could see that even after a restart of the lua-service a new timestamp with the associated values is added.

Best regards

Marc

Sign up

Please use your PTC eSupport account.

Welcome to the PTC Community

Please use your PTC eSupport account.

Scanning file for viruses.

This file cannot be downloaded