watering system.ino

#define PUMP_A 2
#define PUMP_B 3
#define WATER 12
#define BUZZER 13

#define BUZZER_OFF LOW
#define BUZZER_ON HIGH
#define WATER_LOW LOW   //Short-circuit when 'dropped'.
#define WATER_HIGH HIGH
#define PUMP_OFF HIGH
#define PUMP_ON LOW     //Active-low

void setup() {
  //Set up pins
  pinMode(PUMP_A, OUTPUT);
  digitalWrite(PUMP_A, PUMP_OFF);
  //B not used yet
  //pinMode(PUMP_B, OUTPUT);
  //digitalWrite(PUMP_B, PUMP_OFF);
  pinMode(WATER, INPUT_PULLUP);
  pinMode(BUZZER, OUTPUT);
  digitalWrite(BUZZER, BUZZER_OFF);
}

inline void beep() {
  digitalWrite(BUZZER, BUZZER_ON);
  delay(250);              // wait for a second
  digitalWrite(BUZZER, BUZZER_OFF);
}
inline void beepbeep() {
  beep();
  delay(250);
  beep();
}

void loop() {
  if (digitalRead(WATER) == WATER_HIGH) {
    digitalWrite(PUMP_A, PUMP_ON);
    digitalWrite(BUZZER, BUZZER_OFF);
  } else {
    digitalWrite(PUMP_A, PUMP_OFF);
    beepbeep();
    delay(3000);
  }
}