PH meter V1.1 DFRobot Calibration

[Marcelo Machado]

How can i calibrate my ph meter, its on 0ph solution, but shows me 14,70... i tried to rotate de potentiometer fixed on de meter but its do not work
i see another post
viewtopic.php?f=24&t=71
but i recived na error code

[Fernando Garcia]

There no support for this module here.

Try this wiki: https://goo.gl/8ENA4q

Before post anything here check what you wrote, this topic linked haven't anything related with pH meter.

[Marcelo Machado]

How i make ph meter v1.1 DFRobot Works in Ferduino with web control?

i have already do this...

// Comment the line below if you haven't a stamp for tank pH.
#define USE_STAMP_FOR_TANK_PH // Comente esta linha se você não tem um "stamp" para o pH do aquário.

but i dont´t know where conect the pins and if i need to change something in the code

[Fernando Garcia]

There no support for this module here.

Check this topic, maybe can help:

viewtopic.php?p=1550#p1550

[Marcelo Machado]

Now, I,m usind the ferduino with webcontrol but i,m having some problems with the code
I copy this code to a new tab, just change the line "sensorPin A14" because i,m using this pin to the sensor

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/*
 # This sample code is used to test the pH meter V1.1.
 # Editor : YouYou
 # Date   : 2014.06.23
 # Ver    : 1.1
 # Product: analog pH meter V1.1
 # SKU    : SEN0161
*/
#define SensorPin A14            //pH meter Analog output to Arduino Analog Input 2
#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 = 3.5*voltage+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[i];
    }
    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[i]<min){
        amount+=min;        //arr<min
        min=arr[i];
      }else {
        if(arr[i]>max){
          amount+=max;    //arr>max
          max=arr[i];
        }else{
          amount+=arr[i]; //min<=arr<=max
        }
      }//if
    }//for
    avg = (double)amount/(number-2);
  }//if
  return avg;
}

after that, in ferduino code, comment this line

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//const byte dosadora6 = 68; // A14;     // Bomba dosadora 6

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//
// Comment this two lines below if have not stamps
// Comente as duas linhas abaixo se não tiver stamps
//#define STAMPS_V4X     // Comente esta linha para usar Stamps EZO
//#define STAMPS_EZO     // Descomente esta linha para usar Stamps EZO

and add this line

Code: Select all

#define SensorPin A14            //pH meter Analog output to Arduino Analog Input 14
#define Offset 0.00            //deviation compensate
int pHArray[10];   //Store the average value of the sensor feedback
int pHArrayIndex = 0;   
float pHValue;
unsigned long samplingTime = 0;
unsigned long samplingTime1 = 0;
byte samples = 0;

and have code error message

[Fernando Garcia]

There no support for this module here.

[Marcelo Machado]

hello, in ferduino, i used this topic http://www.ferduino.com/forum/viewtopic.php?f=8&t=220 and it Works perfectly

but now, i´m trying to put the code in ferduino webcontrol , but i can´t find this lines

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boolean Stamps = true;

to change it to false

so i coment the lines

after that, in ferduino code, comment this line

Code: Select all

//
// Comment this two lines below if have not stamps
// Comente as duas linhas abaixo se não tiver stamps
//#define STAMPS_V4X     // Comente esta linha para usar Stamps EZO
//#define STAMPS_EZO     // Descomente esta linha para usar Stamps EZO

but i have a error message in Ferduinoweb that i didn´t have in the commom ferdunio code

[Fernando Garcia]

There no support for this module here. This module is not in my part list. Please don't create more topics about this module.