// Source : https://lastminuteengineers.com/soil-moisture-sensor-arduino-tutorial/
// Refer : https://iotspace.dev/arduino-bodenfeuchtesensoren-anleitung-und-sketch/
// Plan: connect pump to digitalpin? or control pump through Node Red?
// Plan refer: if connect digitalpin: https://arduinogetstarted.com/tutorials/arduino-controls-pump

/* Change these values based on your calibration values */
#define soilWet 500   // Define max value we consider soil 'wet' 
#define soilDry 750   // Define min value we consider soil 'dry'

// Sensor pins
#define humsensorPin1a A2     //Tower 1 above
#define humsensorPin1b A3     //Tower 1 below
#define humsensorPin2a A4     //Tower 2 above
#define humsensorPin2b A5     //Tower 2 below

// Define Analog Readings of humidity sensor
int moisture_1a=0;
int moisture_1b=0;
int moisture_2a=0;
int moisture_2b=0;

void setup() {
	Serial.begin(9600);
}

void loop() {
	//get the reading for monitoring and display
	moisture_1a= analogRead(A2);    //Tower 1 above & below
  Serial.print("Moist1a:");
	Serial.println(moisture_1a);
  moisture_1b= analogRead(A3);
  Serial.print("Moist1b:");
	Serial.println(moisture_1b);
  moisture_2a= analogRead(A4);    //Tower 2 above & below
  Serial.print("Moist2a:");
	Serial.println(moisture_2a);
  moisture_2b= analogRead(A5);
  Serial.print("Moist2b:");
	Serial.println(moisture_2b);

	// Determine status of our soil - Tower 1
  if (moisture_1a >= soilDry && moisture_1b >= soilDry) {
		//Both soils is dry -> turn on pump
    Serial.print("Pump:ON");
	} else if (moisture_1a >= soilDry && moisture_1b >= soilWet && moisture_1b < soilDry) {
		// above is dry, below is ok -> turn on pump
    Serial.print("Pump:ON");
 } else if (moisture_1a >= soilWet && moisture_1a < soilDry && moisture_1b >= soilDry) {
		// above is ok, below is dry -> turn on pump
    Serial.print("Pump:ON");
 } else if (moisture_1a <= soilWet && moisture_1b >= soilWet && moisture_1b < soilDry) {
		// above is too wet, below is ok -> turn off pump
    Serial.print("Pump:OFF");
 } else if (moisture_1a >= soilWet && moisture_1a < soilDry && moisture_1b <= soilWet) {
		// above is ok, below too wet -> turn off pump
    Serial.print("Pump:OFF");
 }
	/////// Not sure
	else if (moisture_1a >= soilDry && moisture_1b <= soilWet) {
		// above is dry, below is too wet -> turn off pump
    Serial.print("Pump:OFF");

	} else if (moisture_1a <= soilWet && moisture_1b >= soilDry) {
		// above is too wet, below is dry -> turn off pump
    Serial.print("Pump:OFF");
		
	}
	 else {
		Serial.println("Pump:ERROR with water pumping 1");
	}

// Determine status of our soil - Tower 2
  if (moisture_2a >= soilDry && moisture_2b >= soilDry) {
		//Both soils is dry -> turn on pump
    Serial.print("Pump:ON");
	} else if (moisture_2a >= soilDry && moisture_2b >= soilWet && moisture_2b < soilDry) {
		// above is dry, below is ok -> turn on pump
    Serial.print("Pump:ON");
 } else if (moisture_2a >= soilWet && moisture_2a < soilDry && moisture_2b >= soilDry) {
		// above is ok, below is dry -> turn on pump
    Serial.print("Pump:ON");
 } else if (moisture_2a <= soilWet && moisture_2b >= soilWet && moisture_2b < soilDry) {
		// above is too wet, below is ok -> turn off pump
    Serial.print("Pump:OFF");
 } else if (moisture_2a >= soilWet && moisture_2a < soilDry && moisture_2b <= soilWet) {
		// above is ok, below too wet -> turn off pump
    Serial.print("Pump:OFF");
 }
	/////// Not sure
	else if (moisture_2a >= soilDry && moisture_2b <= soilWet) {
		// above is dry, below is too wet -> turn off pump
    Serial.print("Pump:OFF");

	} else if (moisture_2a <= soilWet && moisture_2b >= soilDry) {
		// above is too wet, below is dry -> turn off pump
    Serial.print("Pump:OFF");
		
	}
	 else {
		Serial.println("Pump:ERROR with water pumping 2");
	}

	delay(1000);	// Take a reading every second for testing
}