问题
I am trying to change my marker based on an alarm I've created in Thingsboard. Currently the marker is displaying data from my "datasource" entity. However there is no way (that I have seen) that you can add an "Alarm source" similar to the alarm widget.
The data available is "f(data, images, dsData, dsIndex)" which I assume is only the data telemetry.
Basically I need to change the marker if an alarm is going off. My alarm trigger only goes off momentarily so I can't use my data telemetry directly...
回答1:
You can try adding a new "Save attribute" on the alarm rule chain, after the alarm is created. Combined with a "Change originator" you can save the attribute to a specific device. Then on the map widget you can add the new attribute to the datasource and act as per that attribute. It is a bit non-conventional approach, but it should probably work for you.
You should have a "Change Originator"--> "Script" --> "Save Attribute" On the script item you should insert the new attribute to the data and update the msgType to "POST_ATTRIBUTES_REQUEST". I'm not sure if you need to update the message or metadata, but I guess you can try and see.
Script code:
msg = {};
msg.alarm = true;
metadata = {};
metadata.alarm = true;
msgType = "POST_ATTRIBUTES_REQUEST";
return {msg: msg, metadata: metadata, msgType: msgType};
来源：https://stackoverflow.com/questions/54915086/is-it-possible-to-get-alarm-data-for-the-map-widget-in-thingsboard