const int red = 9; //1
const int yel = 10; //2
const int green = 11; //3

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);

  attachInterrupt(digitalPinToInterrupt(b1), buttonISR1, FALLING);
  attachInterrupt(digitalPinToInterrupt(b2), buttonISR2, FALLING);
  attachInterrupt(digitalPinToInterrupt(b3), buttonISR3, FALLING);
}

void loop() {

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

  autoPump(ms1, red, b1, rstate, 1);
  autoPump(ms2, yel, b2, ystate, 2);
  autoPump(ms3, green, b3, gstate, 3);
  Serial.println();

  delay(3000);
}

void autoPump(int ms, int pump, int b, volatile boolean& state, int n) {
  ms = map(ms, 0, 1023, 0, 100);

  Serial.print("Moisture% of plant ");
  Serial.print(n);
  Serial.print(" is ");
  Serial.println(ms);

  if (ms < th1) {
    digitalWrite(pump, HIGH);
    state = HIGH;
  } else if (ms > th2) {
    digitalWrite(pump, LOW);
    state = LOW;
  }
}

void buttonISR1() {
  rstate = !rstate;
  digitalWrite(red, rstate);
  delay(2000);
}

void buttonISR2() {
  ystate = !ystate;
  digitalWrite(yel, ystate);
  delay(2000);
}

void buttonISR3() {
  gstate = !gstate;
  digitalWrite(green, gstate);
  delay(2000);
}