const int analogPhPin = A0; //PH module pin P0 connected to analog pin A0
long phTot, temTot;
float phAvg, temAvg;
int x;
float C = 25.85; //Constant of straight line (Y = mx + C)
float m = -6.80; // Slope of straight line (Y = mx + C)
 
void setup() {
 
// sensors.begin(); //Start the DS18B20 Library
Serial.begin(9600);
}
void loop() {
phTot = 0;
temTot = 0;
phAvg = 0;
temAvg = 0;
 
//taking 10 sample and adding with 10 milli second delay
for(x=0; x<10 ; x++)
{
phTot += analogRead(A0);
temTot += analogRead(A1);
delay(10);
}
float temAvg = temTot/10;
float phAvg = temTot/10;
// float temVoltage = temAvg * (5000.0 / 1023.0); //convert sensor reading into milli volt
float phVoltage = phAvg * (5.0 / 1023.0); //convert sensor reading into milli volt
 
 
// float Etemp = temVoltage*0.1; //convert milli volt to temperature degree Celsius
float pHValue = phVoltage*m+C;
 
Serial.print("phVoltage = ");
Serial.print(phVoltage);
Serial.print(" ");
Serial.print("pH=");
Serial.println(pHValue);
 
delay(1000);
}