NodeMCU v3 + FC-22(MQ135) do not working

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•

Aleksandrs

A0 is empty

>analogRead();
=0.00879765395
>analogRead();
=0.00879765395
>analogRead();
=0.00879765395
>analogRead();
=0.00879765395

A0 + MQ135

>analogRead();
=0.31085043988
>analogRead();
=0.30889540566
>analogRead();
=0.29521016617
>analogRead();
=0.28152492668