Arduino 19

WATERING SYSTEM - INTRODUCTION

To accomplish this project, you will need:

1 x Arduino UNO MEGA Duemilanove or Teensy 2.0 +
1 x LCD display with I2C communication
1 x RTC module with I2C communication
1 x Relay Module opto-coupled to 250V/10A
2 x Modules "Driver" LM-393 general purpose
1 x Soil Moisture Sensor (Hygrometer) KDQ11
1 x Water Level Sensor (Homemade)
1 x Buzzer piezoelectric
2 x LEDs - 10mm, Green
1 x LED - 10mm, Red
1 x LED - 10mm, Yellow
4 x Resistors 150 Ohm 1/4 W
1 x Water pump for aquarium, with filter system (127 or 220V)
1 x Electric Power Cable, 127/220VAC - 10Amps
1 x Socket 127/220VAC - 10 Amps

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

#include "RTClib.h"

// frequency musical notes

#define NOTE_C6  1047

#define NOTE_C3  131

#define NOTE_G3  196

// pins definition

int levelSensorPin = 0;

int moistureSensorPin = 1;

int audioPin = 2;

int soggyLEDPin = 3;

int moistsoilLEDPin = 4;

int drysoilLEDPin = 5;

int pumpLEDPin = 6;

int pumpPin = 7;

// variables

int levelSensorValue;       // stores the level sensor values

int moistureSensorValue;    // stores the moisture sensor values

int j = 0;

// system messages

const char *string_table[] =

{   

  "     Welcome! =)",

  "   Tank LOW level",

  "      Dry soil",

  "     Moist soil",

  "     Soggy soil",

  "The water pump is on",

  "   ArduinoByMyself",

  "   Watering System",

  "    Please wait!"

};

// objects definition

RTC_DS1307 RTC;

LiquidCrystal_I2C lcd(0x27,20,4);

void setup(){

  // serial initialization

  Serial.begin(9600);

  

  // LCD initialization

  lcd.init();          

  lcd.backlight();     // with Backlight

  lcd.clear();         // clearscreen

  

  // Wire initialization

  Wire.begin();

  

  // RTC initialization

  RTC.begin();

  if (!RTC.isrunning()){

    // date and time adjust as the PC computer date and time

    RTC.adjust(DateTime(__DATE__, __TIME__)); 

  }

  

  // Arduino pins initalization

  pinMode(audioPin, OUTPUT);

  pinMode(soggyLEDPin, OUTPUT);

  pinMode(moistsoilLEDPin,OUTPUT);

  pinMode(drysoilLEDPin,OUTPUT);

  pinMode(pumpLEDPin,OUTPUT);

  pinMode(pumpPin,OUTPUT);

  

  // LCD initial messages

  lcd.clear();

  lcd.setCursor(0,0);

  lcd.print(string_table[6]); 

  lcd.setCursor(0,1);

  lcd.print(string_table[7]); 

  lcd.setCursor(0,3);

  lcd.print(string_table[0]); 

  // initialization delay

  delay(5000); 

}

void loop(){

  

  

  // RTC parameters definition

  DateTime myRTC = RTC.now();

  int H = myRTC.hour();

  int M = myRTC.minute();

  int S = myRTC.second();

  

  // call Clock Function

  //RightHour();

  

  // reads the sensors

  levelSensorValue = analogRead(levelSensorPin);

  moistureSensorValue = analogRead(moistureSensorPin);

  

  // if low water level: plays the low level alarm

  if(levelSensorValue > 600){

    // system messages

    lcd.clear();

    RightHour();

    lcd.setCursor(0,3);

    lcd.print(string_table[1]); 

    // plays the alarm sound

    for(int i=0;i<2;i++){

      tone(audioPin, NOTE_G3, 200);

      delay(200);

      tone(audioPin, NOTE_C3, 200);

      delay(200);

      noTone(audioPin);

    }

  }

  

  // check the moisture range

  if(moistureSensorValue >= 700){

    // in case of dry soil:

    // system messages

    lcd.clear();

    RightHour();

    lcd.setCursor(0,3);

    lcd.print(string_table[2]);

    // lights up the correct LED

    digitalWrite(drysoilLEDPin,HIGH);

    digitalWrite(moistsoilLEDPin,LOW);

    digitalWrite(soggyLEDPin,LOW);

    // plays the alarm sound

    tone(audioPin, NOTE_C6, 100);

    delay(250);

    noTone(audioPin);

  }

  if((moistureSensorValue < 700) && (moistureSensorValue >= 300)){

    // in case of moist soil:

    // system messages

    lcd.clear();

    RightHour();

    lcd.setCursor(0,3);

    lcd.print(string_table[3]);

    // lights up the correct LED

    digitalWrite(drysoilLEDPin,LOW);

    digitalWrite(moistsoilLEDPin,HIGH);

    digitalWrite(soggyLEDPin,LOW);

    delay(250);

  }

  if(moistureSensorValue < 300){

    // in case of soggy soil:

    // system messages

    lcd.clear();

    RightHour();

    lcd.setCursor(0,3);

    lcd.print(string_table[4]); 

    // lights up the correct LED

    digitalWrite(drysoilLEDPin,LOW);

    digitalWrite(moistsoilLEDPin,LOW);

    digitalWrite(soggyLEDPin,HIGH);

    delay(100);

  }

  

  // if the soil is dry and if it is the right time: turn on the pump for 1 minute

  if((H == 16) && (M == 50) && (S == 00)){

    while(moistureSensorValue >= 700){

      // system messages

      lcd.clear();

      RightHour();

      lcd.setCursor(0,1);

      lcd.print(string_table[8]);

      lcd.setCursor(0,3);

      lcd.print(string_table[5]);

      // turn the pump on

      digitalWrite(pumpPin,HIGH);

      digitalWrite(pumpLEDPin,HIGH);

      delay(10000);

      // if the soil is not moist so far

      // reads the moisture sensor once more

      moistureSensorValue = analogRead(moistureSensorPin);

    }

    // turn the pump off

    digitalWrite(pumpPin,LOW);

    digitalWrite(pumpLEDPin,LOW);

  }

  

}

// Real Time Clock Function

void RightHour()

{

  DateTime Now = RTC.now();

  String clock_date = "  Date: ";

  String clock_hour = "   Time: ";

  

  int _day = Now.day();

  int _month = Now.month();

  int _year = Now.year();

  

  clock_date += fixZero(_day);

  clock_date += "/";

  clock_date += fixZero(_month);

  clock_date += "/";

  clock_date += _year;

  

  int _hour = Now.hour();

  int _minute = Now.minute();

  int _second = Now.second();

  

  clock_hour += fixZero(_hour);

  clock_hour += ":";

  clock_hour += fixZero(_minute);

  clock_hour += ":";

  clock_hour += fixZero(_second);

  

  lcd.clear();

  lcd.setCursor(0, 0);

  lcd.print(clock_date);

  lcd.setCursor(0, 1);

  lcd.print(clock_hour);

  

  delay(500);

}

String fixZero(int i)

{

  String ret;

  if (i < 10) ret += "0";

  ret += i;

  return ret;

}