how can i get the variable from this

Using Arduino Programming Questions
#1

how can i get ph meter variable and use later for alarming system via gms, led ,sound, exc.
/*

This sample code is used to test the pH meter Pro V1.0.

Editor : YouYou

Ver : 1.0

Product: analog pH meter Pro

SKU : SEN0169

/
#define SensorPin A0 //pH meter Analog output to Arduino Analog Input 0
#define Offset 0.00 //deviation compensate
#define LED 13
#define samplingInterval 20
#define printInterval 800
#define ArrayLenth 40 //times of collection
int pHArray[ArrayLenth]; //Store the average value of the sensor feedback
int pHArrayIndex=0;
void setup(void)
{
pinMode(LED,OUTPUT);
Serial.begin(9600);
Serial.println(“pH meter experiment!”); //Test the serial monitor
}
void loop(void)
{
static unsigned long samplingTime = millis();
static unsigned long printTime = millis();
static float pHValue,voltage;
if(millis()-samplingTime > samplingInterval)
{
pHArray[pHArrayIndex++]=analogRead(SensorPin);
if(pHArrayIndex==ArrayLenth)pHArrayIndex=0;
voltage = avergearray(pHArray, ArrayLenth)5.0/1024;
pHValue = 3.5voltage+Offset;
samplingTime=millis();
}
if(millis() - printTime > printInterval) //Every 800 milliseconds, print a numerical, convert the state of the LED indicator
{
Serial.print(“Voltage:”);
Serial.print(voltage,2);
Serial.print(" pH value: ");
Serial.println(pHValue,2);
digitalWrite(LED,digitalRead(LED)^1);
printTime=millis();
}
}
double avergearray(int arr, int number){
int i;
int max,min;
double avg;
long amount=0;
if(number<=0){
Serial.println(“Error number for the array to avraging!/n”);
return 0;
}
if(number<5){ //less than 5, calculated directly statistics
for(i=0;i<number;i++){
amount+=arr*;*

  • }*
  • avg = amount/number;*
  • return avg;*
  • }else{*
  • if(arr[0]<arr[1]){*
  • min = arr[0];max=arr[1];*
  • }*
  • else{*
  • min=arr[1];max=arr[0];*
  • }*
  • for(i=2;i<number;i++){*
    _ if(arr*<min){_
    _     amount+=min; //arr<min*_
    _ min=arr*;
     }else {
    if(arr>max){
    amount+=max; //arr>max*
    max=arr*;
    }else{
    amount+=arr; //min<=arr<=max*
    * }
    }//if*
    * }//for*
    * avg = (double)amount/(number-2);
    }//if*
    * return avg;
    }*_
#2

Please use code tags.

Because you did not the code suddenly got italic because it encountered an [i] tag in your piece of text code

[code] ...[/code]

you can edit your original post in the lower right corner

#3

how can i get ph meter variable

You mean the variable called pHValue?

#4