#include <Stepper.h>

const int stepsPerRevolution = 2048;

Stepper myStepper(stepsPerRevolution, 8, 11, 10, 12);

const int waterSensorPin = A1;

const int threshold = 300;

bool lastWetState = false;   // remembers previous state

void setup() {

  Serial.begin(9600);

  Serial.println("Stepper motor water direction demo starting...");

  myStepper.setSpeed(10); // RPM

}

void loop() {

  int sensorValue = analogRead(waterSensorPin);

  bool isWet = sensorValue > threshold;

  Serial.print("Water sensor value: ");

  Serial.println(sensorValue);

  // ✅ Detect state change

  if (isWet != lastWetState) {

    unsigned long startTime = millis();

    if (isWet) {

      Serial.println("Wet detected → Clockwise for 5 seconds");

      while (millis() - startTime < 5000) {

        myStepper.step(1);   // clockwise

      }

    } else {

      Serial.println("Dry detected → Counterclockwise for 5 seconds");

      while (millis() - startTime < 5000) {

        myStepper.step(-1);  // counterclockwise

      }

    }

    Serial.println("Motor stopped.\n");

    // ✅ Update last state AFTER motor action

    lastWetState = isWet;

  }

  delay(200); // small delay to reduce sensor noise

}