Automatic watering

#include <RTClib.h>
#include <SPI.h>
#include <SD.h>
#include <Wire.h>

const char* filename = "datalog.csv";
File file;
RTC_DS1307 rtc;
char Time[20];

const int dry1 = 544; // Minimum sensor1 dryness to turn electric valve on
const int wet1 = 270; // Maximum sensor1 wetness to turn electric valve off

const int dry2 = 544; // Minimum sensor2 dryness to turn electric valve on
const int wet2 = 270; // Maximum sensor2 wetness to turn electric valve off

const int dry3 = 544; // Minimum sensor3 dryness to turn electric valve on
const int wet3 = 270; // Maximum sensor3 wetness to turn electric valve off

const int dry4 = 544; // Minimum sensor4 dryness to turn electric valve on
const int wet4 = 270; // Maximum sensor4 wetness to turn electric valve off

const int LowMoisture = 20;    // Minimum moisture level before misting
const int HighMoisture = 75;   // Maximum moisture level before counting 1 
const int maxwatercount = 2;   // Maximum times to water plants a day

const int pps= 2;              // Setting pressure pump switch to Pin 2
const int ms = 3;              // Setting manual watering switch to Pin 3
const int ev = 4;              // Setting electrical valve to Pin 4
const int pp = 5;              // Setting pressure pump to Pin 5

int watercount = 0;      // Counting the number of watering sessions
int watercond = 0;       // Condition to water (TRUE or FALSE) 

void setup() {
  Serial.begin(9600);
  Wire.begin();
  rtc.begin();
  rtc.adjust(DateTime(__DATE__, __TIME__));

  pinMode(pps,INPUT);      // PRESSURE PUMP SWITCH
  pinMode(ms,INPUT);       // MANUAL SWITCH
  pinMode(ev,OUTPUT);      // ELECTRICAL VALVE
  pinMode(pp,OUTPUT);      // PRESSURE PUMP
  pinMode(10,OUTPUT);      // SD WRITE
  digitalWrite(ev,HIGH);   // TURN VALVE OFF INITIALLY
  digitalWrite(pp,HIGH);   // TURN PRESSURE PUMP OFF INITIALLY
    
  if (!SD.begin(10)) {
    Serial.println("Error : Push the reset button");
    for (;;);
  }  
  file = SD.open(filename, FILE_WRITE); 
  if (file.size() == 0) {
    file.print("Watering Time, Moisture 1, Moisture 2, Moisture 3, Moisture 4, Water count");
  }
} 

void loop() {
  
  int manualState = digitalRead(ms);           // Read the INPUT VOLTAGE OF PIN 3
  int ppState = digitalRead(pps);              // READ THE INPUT VOLTAGE OF PIN 2
  int ActppSt = digitalRead(pp);               // READ ACTUAL PUMP STATE
  int sensorVal1 = analogRead(A0);             // READ THE MOISTURE SENSOR 1
  int sensorVal2 = analogRead(A1);             // READ THE MOISTURE SENSOR 2
  int sensorVal3 = analogRead(A2);             // READ THE MOISTURE SENSOR 3
  int sensorVal4 = analogRead(A3);             // READ THE MOISTURE SENSOR 4

  int Moisturelvl1 = map(sensorVal1, wet1, dry1, 100, 0);
  int Moisturelvl2 = map(sensorVal2, wet2, dry2, 100, 0);
  int Moisturelvl3 = map(sensorVal3, wet3, dry3, 100, 0);
  int Moisturelvl4 = map(sensorVal4, wet4, dry4, 100, 0);



  if ((Moisturelvl1<=LowMoisture)||(Moisturelvl2<=LowMoisture)||(Moisturelvl3<=LowMoisture)||(Moisturelvl4<=LowMoisture)) {
    watercond = 1;                 // Condition to water
  }
  else if ((Moisturelvl1>=HighMoisture)||(Moisturelvl2>=HighMoisture)||(Moisturelvl3>=HighMoisture)||(Moisturelvl4>=HighMoisture)){
    watercond = 0;                // Condition to stop water
  }
  
  DateTime now = rtc.now();
  sprintf(Time, "%02d:%02d:%02d %02d/%02d/%02d",  now.hour(), now.minute(), now.second(), now.day(), now.month(), now.year());
  
  if ((now.hour()==0) && (now.minute()==0)){
  watercount = 0;
  }

  Serial.print(Time);
  Serial.print("  ");
  Serial.print(Moisturelvl1);
  Serial.print(",");
  Serial.print(Moisturelvl2);
  Serial.print(",");
  Serial.print(Moisturelvl3);
  Serial.print(",");
  Serial.print(Moisturelvl4);
  Serial.print(", Watercount:");
  Serial.print(watercount);
  Serial.print(", Manual Switch State:");
  if (manualState == HIGH){
  Serial.print ("OFF");
  }
  else {
  Serial.print ("ON");
  }
  Serial.print(", Pump Switch State:");
  if (ppState == HIGH){
  Serial.print ("OFF");
  }
  else {
  Serial.print ("ON");
  }
  Serial.print(", Pump State:");
  if (ActppSt == HIGH){
  Serial.println ("OFF");
  }
  else {
  Serial.println ("ON");
  }

  if (ppState == LOW){
    if ( now.hour()>=7 && now.hour()<=23){
          digitalWrite(pp,LOW);      // TURN PRESSURE PUMP ON
          delay(200);
    }
  }
  
  else {
    digitalWrite(pp,HIGH);          // TURN PRESSURE PUMP OFF
    delay(200);
  }
  
if (ppState == LOW ){              // ONLY START THE AUTO-WATERING WHEN PPS IS ON
  if (manualState == LOW || watercount<maxwatercount){
    if (manualState == LOW || watercond == 1){
      
       if (file) {
        file.print(Time);
        file.print(",");
        file.print(Moisturelvl1);
        file.print(",");
        file.print(Moisturelvl2);
        file.print(",");
        file.print(Moisturelvl3);
        file.print(",");
        file.print(Moisturelvl4);
        file.print(",");
        file.println(watercount);
        file.flush();
        }
       else {
        Serial.println("Error opening datalog.txt");
         }
         
       digitalWrite(ev,LOW);                 // TURN VALVE ON
       digitalWrite(pp,LOW);                 // TURN PRESSURE PUMP ON
       delay(300000);                        // WATERING TIMER (5 MINS)
       watercount = watercount+1;            // ADD THE WATERCOUNT FOR THIS DAY
       
    }
      else {
       digitalWrite(ev,HIGH);             // TURN VALVE OFF
       delay(200);
       }
  }
}

  else {
  digitalWrite(ev,HIGH);                // TURN VALVE OFF
  delay(200);
  }

  delay(600);
}