pH/ORP stamp Atlas scientific

Projects Interfacing w/ Software on the Computer
4

Thanks for your responses,

robtillaart:
This relates to this thread but is an other subject - pH monitoring with Atlas Scientific pH stamp - Home Automation - Arduino Forum -

Yes it does, but I found in the old forum something very similar today under the category "Interfacing w/ Software on the Computer", so I just wanted to put this in the right place.

as a matter of fact, PaulS, you helped a lot in that post:
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1294830203

This code? What code?

#include <SoftwareSerial.h>

#define rxpin 2 
#define txpin 3


SoftwareSerial myserial (rxpin, txpin);
String inputstring = "";
String sensorstring = "";
boolean input_stringcomplete = false;
boolean sensor_stringcomplete = false;
float pH_val = 0.0;

void setup(){ 
Serial.begin(38400);
myserial.begin(38400);
inputstring.reserve(5);
sensorstring.reserve(30);
}  

void serialEvent() { 
char inchar = (char)Serial.read();
inputstring += inchar;
if(inchar == '\r') {input_stringcomplete = true;}
pH_val = atof(inch);
}       

 void loop(){
if (input_stringcomplete){
   myserial.print(inputstring); 
   inputstring = "";
   input_stringcomplete = false;
}                 

while (myserial.available()) {
char inchar = (char)myserial.read();
sensorstring += inchar;
if (inchar == '\r') {sensor_stringcomplete = true;}
}
 if (sensor_stringcomplete){
   Serial.print(sensorstring);
   sensorstring = ""; 
   sensor_stringcomplete = false;
   }

}

robtillaart also helped me a lot and got this more straightforward code to work

#include <SoftwareSerial.h>

#define rxph 2 
#define txph 3

SoftwareSerial pH (rxph, txph);

void setup()
{ 
  Serial.begin(38400);
  pH.begin(38400);
}  

 void loop()
{
  if (pH.available() >0) 
  {
    char incharPH = (char)pH.read();
    Serial.print(incharPH);
    
  }
}

but I am still having calibration issues: stamp is supposed to read pH7 in a test solution but only reads 6.8 and then in another test solution of pH 10, it reads 12...
According to the datasheet, I should be able to send some commands to be able to calibrate the stamp, but I have yet to succeed...

I'm getting a continuous serial read, but I can't seem to use the values to run a comparaison with my preset values...
Why not? It doesn't matter how often you get a value.

That sensor, by the way, can be configured to only provide a value when you request one.

I'm really not sure how to do that... :~

thanks a lot for your help and sorry for the missunderstanding