Hi,
how can I get temperature data from string tag (temperature:100). I need temperature in celsius.
Thanks for the answer.
Just for clarification, you're able to get the value {"id":100, "tC":24.1, "tF":75.4}
, but it's a string?
...or are you having trouble reading the tag itself?
That's right I get the value but it's string.
I put your displayed value into a string tag, and I was able to bind the desired value with the following expression:
jsonGet({[Sample_Tags]Writeable/temperature:100}, "tC")
Obviously, you'll have to replace {[Sample_Tags]Writeable/temperature:100}
with your tag path, but otherwise jsonGet should work.
Result:
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If you need this via script, I was able to get the Celsius value in the following way:
temperatureTagValue = system.tag.readBlocking(["[Sample_Tags]Writeable/temperature:100"])[0].value
temperatureData = system.util.jsonDecode(temperatureTagValue)
celsiusValue = temperatureData["tC"]
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Consider a derived tag with jsonGet
and jsonSet
if you want bidirectional support.
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