First to say hello!
I want to "extract" only the value data from an array/object.
It's a capacity measurement from my solar battery, I need to sent the value only via MQTT.
I'm now sending "col28: 260.00", but I need to sent only the value "260.00".
I tried with an "change" function to set the msg.payload to "msg.payload.0.col28.Value" as suggested on other thread I found with similar problem, but doesn't work, tried also every other combination like "msg.payload.col28.Value", etc...
I have read the messages documentation, but there I can't find anything similar.