MoistureSensor.ino

// the setup function runs once when you press reset or power the board
int led6 = 6; 
int buzzer = 7;

int val = 0; //value for storing moisture value 
int soilPin = A4;//Declare a variable for the soil moisture sensor 
int soilPower = 2;//Variable for Soil moisture Power

int SoilMoisture;
int DryValue = 500;
void setup() {

  pinMode(soilPower, OUTPUT);//Set D7 as an OUTPUT
  digitalWrite(soilPower, LOW);//Set to LOW so no power is flowing through the sensor

  
  pinMode(led6, OUTPUT);
  pinMode(buzzer, OUTPUT);

  // Serial Monitor @ 115200
  Serial.begin(115200);
  Serial.println(" Starting at 115200 baud");
  Serial.println("<Arduino is ready>");
}

// the loop function runs over and over again forever
void loop() {
 //
 //BUZZ();

//Serial.print("Soil Moisture = ");    
//get soil moisture value from the function below and print it
//Serial.println(readSoil());
readSoil();
Serial.println(SoilMoisture);
    if(SoilMoisture >= DryValue){
    LED_light();
    //BUZZ();
   // Serial.println(SoilMoisture);
    }


delay(1000);//take a reading every second 
}

int readSoil(){ //This is a function used to get the soil moisture content
    digitalWrite(soilPower, HIGH);//turn D7 "On"
    delay(10);//wait 10 milliseconds 
    val = analogRead(soilPin);//Read the SIG value form sensor 
    digitalWrite(soilPower, LOW);//turn D7 "Off"
    SoilMoisture = val;
    return val;//send current moisture value
}


void LED_light(){
  Serial.println("Dry!!");
 digitalWrite(led6, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(led6, LOW);    // turn the LED off by making the voltage LOW
}

void BUZZ(){
Serial.println("BUZZ");
digitalWrite(buzzer, HIGH);
delay(1000);
digitalWrite(buzzer, LOW);
}