arduino nano moist sensor temperature humidity waper pump

arduino_waper_pump

#include <Wire.h>
#include <LiquidCrystal_PCF8574.h>
#include "DHT.h"
#define DHTPIN 11
#define DHTTYPE DHT11   // DHT 11
DHT dht(DHTPIN, DHTTYPE);

#define MOISTPIN 6

int sensorvalue = 0;
int percentagevalue = 0;

#define PUMPPIN 4


LiquidCrystal_PCF8574 lcd(0x27);  // set the LCD address to 0x27 for a 16 chars and 2 line display

int show;

void setup()
{

  pinMode(PUMPPIN, OUTPUT);
  pinMode(MOISTPIN, INPUT);


  dht.begin();
  int error;

  Serial.begin(9600);
  Serial.println("LCD...");

  while (! Serial);
  Serial.println("Dose: check for LCD");

  Wire.begin();
  Wire.beginTransmission(0x27);
  error = Wire.endTransmission();
  Serial.print("Error: ");
  Serial.print(error);

  if (error == 0) {
    Serial.println(": LCD OK found.");
  }

  lcd.begin(16, 2); // initialize the lcd

  digitalWrite(PUMPPIN, LOW);
  delay(5000);
  Serial.println("START...");


}

void loop()
{

  lcd.setBacklight(255);
  lcd.home();
  //lcd.clear();
  sensorvalue = analogRead(MOISTPIN);
  if (sensorvalue > 1023) {
    sensorvalue = 1023;
  }
  if (sensorvalue < 300) {
    sensorvalue = 300;
  }
  percentagevalue = map(sensorvalue, 1023 , 300, 0 , 100 );
  Serial.println(sensorvalue);

  lcd.setCursor(0, 0);
  lcd.print("Temp: "  + padd(String(dht.readTemperature()), "     ") + "C");
  lcd.setCursor(0, 1);  
  lcd.print("H "  + padd(String(dht.readHumidity()), "     ") + "%");
  lcd.print(" M " + padd(String(percentagevalue), "   ") + "%" );

  if (percentagevalue < 50) {
    digitalWrite(PUMPPIN, HIGH);
    delay(5000);
  } 
  digitalWrite(PUMPPIN, LOW);
  delay(500);
}


String padd(String text, String add) {
  int len ;
  text = add + text;
  len = text.length();
  return  (&text[len - add.length()]);
}