Hello I am reaading one information MQTT in msg.payload. But i receive one string How i can convert it to number ? My intent is show this number in one graph or chart Thank you

String to number

ricardokemp 21 June 2018 17:23 6

Hello

As you can see, the values comming from topic Umidade (MQTT) I see as string

I need to convert to number, because the chart does not change

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String to number

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