Notes

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <OneWire.h>
//#include <BH1750.h>
#include <DallasTemperature.h>
#include <SI7021.h>

int siviseviyePin = A7;
int siviseviyesi;

int pH_Value;
float Voltage;
unsigned long int avgValue;
float b;
int buf[10],temp;

int R1= 1000;
int Ra=25;
int ECPin= A4;
int ECGround=A5;
int ECPower =A6;

float PPMconversion=0.7;
float TemperatureCoef = 0.019;
float K=2.88;

#define ONE_WIRE_BUS A0
const int TempProbePossitive =8;
const int TempProbeNegative=9;

#define SensorPin A1


OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

float susicaklik=10;
float EC=0;
float EC25 =0;
int ppm =0;

float raw= 0;
float Vin= 5;
float Vdrop= 0;
float Rc= 0;
float buffer=0;


//BH1750 lightMeter;

//random rastgele = new Random (20,40);

void setup()
{
Serial.begin(9600);
pinMode(TempProbeNegative , OUTPUT );
digitalWrite(TempProbeNegative , LOW );
pinMode(TempProbePossitive , OUTPUT );
digitalWrite(TempProbePossitive , HIGH );
pinMode(ECPin,INPUT);
pinMode(ECPower,OUTPUT);
pinMode(ECGround,OUTPUT);
digitalWrite(ECGround,LOW);
delay(100);
sensors.begin();
R1=(R1+Ra);

pinMode(5,OUTPUT);
pinMode(6,OUTPUT);
pinMode(7,OUTPUT);

pinMode(A2,OUTPUT);
Serial.begin(9600);
Wire.begin();

//Serial.begin(9600);
sensors.begin();

// lightMeter.begin();

pinMode(siviseviyePin, INPUT);
Serial.begin(9600);
// Serial.println("Hazır !");
}

void loop()
{
GetEC();
delay(800);
for(int i=0;i<10;i++)
{
buf[i]=analogRead(SensorPin);
delay(10);
}
for(int i=0;i<9;i++)
{
for(int j=i+1;j<10;j++)
{
if(buf[i]>buf[j])
{
temp=buf[i];
buf[i]=buf[j];
buf[j]=temp;
}
}
}
avgValue=0;
for(int i=2;i<8;i++)
avgValue+=buf[i];
float phValue=(float)avgValue*5.0/1024/6;
phValue=3.5*phValue;


digitalWrite(5,LOW);
delay(4000);
digitalWrite(5,HIGH);
delay(1000);
digitalWrite(6,LOW);
delay(4000);
digitalWrite(6,HIGH);
delay(1000);
digitalWrite(7,HIGH);
delay(1000);
digitalWrite(A2, HIGH);
delay(800);
digitalWrite(A2, LOW);

//int lux = lightMeter.readLightLevel();
//double susicaklik = (sensors.getTempCByIndex(0));

Serial.print(siviseviyesi);
Serial.print(" / ");
Serial.print(susicaklik);
// Serial.print(" *C ");
Serial.print(" / ");
// Serial.print(" pHDeger ");
Serial.print(phValue);
Serial.print(" / ");
// Serial.print("Rc: ");
Serial.print(Rc);
Serial.print(" / ");
// Serial.print(" EC: ");
Serial.print(EC25);
Serial.print(" / ");
// Serial.print(" Simens ");
Serial.println(ppm);
// Serial.print(" / ");
// Serial.println(" ppm ");
delay(400);}

void GetEC(){
sensors.requestTemperatures();// Send the command to get temperatures
susicaklik=sensors.getTempCByIndex(0); //Stores Value in Variable


digitalWrite(ECPower,HIGH);
raw= analogRead(ECPin);
raw= analogRead(ECPin);// This is not a mistake, First reading will be low beause if charged a capacitor
digitalWrite(ECPower,LOW);

Vdrop= (Vin*raw)/1024.0;
Rc=(Vdrop*R1)/(Vin-Vdrop);
Rc=Rc-Ra; //acounting for Digital Pin Resitance
EC = 1000/(Rc*K);

EC25 = EC/ (1+ TemperatureCoef*(susicaklik-25.0));
ppm=(EC25)*(PPMconversion*1000);

;}
void PrintReadings(){
Serial.print("Rc: ");
Serial.print(Rc);
Serial.print(" EC: ");
Serial.print(EC25);
Serial.print(" Simens ");
Serial.print(ppm);
Serial.print(" ppm ");
Serial.print(susicaklik);
Serial.println(" *C ");
};

//float lux = lightMeter.readLightLevel();
//Serial.print("Light:");
// Serial.print(lux);
//Serial.println(" lx");
//delay(1000);

// siviseviyesi = analogRead(siviseviyePin);
// Serial.print("Sıvı Seviyesi: ");
//Serial.println(siviseviyesi);
//Serial.print("/");
//delay(850);

//sensors.requestTemperatures();
//Serial.print(sensors.getTempCByIndex(0));
//Serial.print(sensor.getTempCByIndex(0));
//Serial.println("C");
// delay(800);

/* float temp = sensor.getCelsiusHundredths();
Serial.print("Sıcaklık : ");
Serial.print(temp);
Serial.println("C");
delay (1000);

/ float humi = sensor.getHumidityPercent();
Serial.print("Nem : ");
Serial.print(humi);
Serial.println("");
delay(1000);*/