Ignore negative values from node red?

@MarkR wrote:

Hello

I am getting power readings from a RPIZ_CT3V1 and sending to HA via node red/mqtt… Everything works except i am getting negative values when a certain item is off, -2 or -3 instead of zero. How can I get HA or node red to ignore the negatives or better still make them send just 0 not negative please?

Cheers
Mark

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