const float GAMMA = 0.7;
const float RL10 = 50; 
const int dirPin = 2;
const int stepPin = 4;
bool valveOn = false;

void turnoff(){
	int steps = 1200;
	digitalWrite(dirPin, LOW);
	for(steps; steps>0; steps--){
		digitalWrite(stepPin, HIGH);
		delay(3);
		digitalWrite(stepPin, LOW);
		delay(3);
	}
}


void turnon(){
	int steps = 0;
	digitalWrite(dirPin, HIGH);
	for(steps; steps<1200; steps++){
		digitalWrite(stepPin, HIGH);
		delay(3);
		digitalWrite(stepPin, LOW);
		delay(3);
	}
	
}


void setup() {
	int analogValue = analogRead(A0);
	float voltage = analogValue / 1024. * 5;
	float resistance = 2000 * voltage / (1 - voltage / 5);	
	float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
	int valveOn = 0;
	int steps = 0;
  //Serial.begin(115200);
  pinMode(stepPin, OUTPUT);
	pinMode(dirPin, OUTPUT);

	
	
}



void loop() {
	int analogValue = analogRead(A0);
	float voltage = analogValue / 1024. * 5;
	float resistance = 2000 * voltage / (1 - voltage / 5);	
	float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

	if(lux>=10000) 
	{
		turnon();
		digitalWrite(stepPin, LOW);
	}
	else {
		turnoff();
	}

}