Ultrasonic HC-SR04 outputs incorrect dist value

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Wilberforce

What did yòu change A0 and A1 to and how did you wire it up?

I think the values you are seeing are random values.

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coyu1314 in reply to @Wilberforce

I have
A0 map to NodeMCU.D1(Label D1 on board) => Trig on sensor
A1 map to NodeMCU.D2(Label D2 on board) => Echo On sensor

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