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I'm building a home automation product and want to measure AC current using Arduino (as of now). I've used ACS712 5A Hall Effect Current module but there's a lot of electrical noise and also the accuracy is not good. There's a lot of deflection in value when no current passes through it. I want to pack the whole kit in a box. So how to make sure that there will be no magnetic interference?

Can you suggest some other module to use for the same? Also that can last long enough.

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Some sort of Current Transformer usually does the trick. You run the AC line (not the neutral) through a ferrite core and it converts current into an output voltage. You can find them packaged like this one with a web search.

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