const int red = 9;
const int yel = 10;
const int green = 11;

const int b1 = 2;
const int b2 = 3;
const int b3 = 4;

const int th1 = 30;
const int th2 = 70;

volatile boolean rstate = LOW;
volatile boolean ystate = LOW;
volatile boolean gstate = LOW;

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

  pinMode(red, OUTPUT);
  pinMode(yel, OUTPUT);
  pinMode(green, OUTPUT);

  pinMode(b1, INPUT_PULLUP);
  pinMode(b2, INPUT_PULLUP);
  pinMode(b3, INPUT_PULLUP);

}

void loop() {

  int ms1 = analogRead(A0);
  int ms2 = analogRead(A1);
  int ms3 = analogRead(A2);

  ms1 = map(ms1, 0, 1023, 0, 100);
  ms2 = map(ms2, 0, 1023, 0, 100);
  ms3 = map(ms3, 0, 1023, 0, 100);

  Serial.print("Moisture% of plant 1(red) is ");
  Serial.println(ms1);
  Serial.print("Moisture% of plant 2(yellow) is ");
  Serial.println(ms2);
  Serial.print("Moisture% of plant 3(green) is ");
  Serial.println(ms3);
  Serial.println();
  //delay(3000);
  
  if(digitalRead(b1) == LOW){ 
    rstate = !rstate;
    digitalWrite(red, rstate);
    Serial.println(rstate);
    delay(2000);
  }
  else if (ms1 < th1) {
    digitalWrite(red, HIGH);
    rstate = HIGH; 
  } else if (ms1 > th2) {
    digitalWrite(red, LOW);
    rstate = LOW; 
  }

  if(digitalRead(b2) == LOW){ 
    ystate = !ystate;
    digitalWrite(yel, ystate);
    Serial.println(rstate);
    delay(2000);
  }
  else if (ms2 < th1) {
    digitalWrite(yel, HIGH);
    ystate = HIGH; 
  } else if (ms2 > th2) {
    digitalWrite(yel, LOW);
    ystate = LOW; 
  }

  if(digitalRead(b3) == LOW){ 
    gstate = !gstate;
    digitalWrite(green, gstate);
    Serial.println(gstate);
   // delay(2000);
  }
  else if (ms3 < th1) {
    digitalWrite(green, HIGH);
    gstate = HIGH; 
  } else if (ms3 > th2) {
    digitalWrite(green, LOW);
    gstate = LOW; 
  }
  
}