Arduino nano input of analog pin is always 1

[alto777]

@gonanf_2

  int R = analogRead(A0);
  if (R == HIGH) {
    Serial.println(R);
  }

HIGH should not enter into using analogRead values. HIGH is 1, the analog value ranges from 0 to 1023, so is rarely is it exactly 1.

Just print R unconditionally. Maybe put a delay in the loop if you don't like values shooting off the screen, like 100 milliseconds to take it a bit.

a7