Arduino Electrical Conductivity (EC - PPM - TDS) Meter
Bu sitedeki düzeneği yapmaya çalışıyorum ve aynı kodları ve bağlantıları yapıyor ama istediğim gibi ppm vermiyor. Lütfn bir bakabilir miyiz kaç gündür bir sonuca varamadım.
Kodlarım:
[CODE title="tds"]/*
ElCheapo Arduino EC-PPM measurments.
This scrip uses a common USA two prong plug and a 47Kohm Resistor to measure the EC/PPM of a Aquaponics/Hydroponics Sytem.
You could modift this code to Measure other liquids if you change the resitor and values at the top of the code.
This Program will give you a temperature based feed controller. See Read me in download file for more info.
28/8/2015 Michael Ratcliffe [email protected]
This program is free software: you can redistribute it and/or modify.
it under the terms of the GNU General Public License as published by.
the Free Software Foundation, either version 3 of the License, or.
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of.
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the.
GNU General Public License for more details.
You should have received a copy of the GNU General Public License.
along with this program. If not, see .
Parts:
-Arduino - Uno/Mega
-Standard American two prong plug.
-1 kohm resistor.
-DS18B20 Waterproof Temperature Sensor.
Limitations:
-
-
See www.MichaelRatcliffe.com/Projects for a Pinout and user guide or consult the Zip you got this code from.
*/
//************************** Libraries Needed To Compile The Script [See Read me In Download] ***************//
// Both below Library are custom ones [ SEE READ ME In Downloaded Zip If You Dont Know how To install] Use them or add a pull up resistor to the temp probe.
#include <OneWire.h>
#include <DallasTemperature.h>
//************************* User Defined Variables ********************************************************//
//##################################################################################
//----------- Do not Replace R1 with a resistor lower than 300 ohms ------------
//##################################################################################
int R1= 1000;
int Ra=25; //Resistance of powering Pins.
int ECPin= A0;
int ECGround=A1;
int ECPower =A4;
//*********** Converting to ppm [Learn to use EC it is much better**************//
// Hana [USA] PPMconverion: 0.5
// Eutech [EU] PPMconversion: 0.64
//Tranchen [Australia] PPMconversion: 0.7
// Why didnt anyone standardise this?
float PPMconversion=0.7;
//*************Compensating for temperature ************************************//
//The value below will change depending on what chemical solution we are measuring.
//0.019 is generaly considered the standard for plant nutrients [google "Temperature compensation EC" for more info.
float TemperatureCoef = 0.019; //this changes depending on what chemical we are measuring.
//********************** Cell Constant For Ec Measurements *********************//
//Mine was around 2.9 with plugs being a standard size they should all be around the same.
//But If you get bad readings you can use the calibration script and fluid to get a better estimate for K
float K=2.88;
//************ Temp Probe Related *********************************************//
#define ONE_WIRE_BUS 10 // Data wire For Temp Probe is plugged into pin 10 on the Arduino.
const int TempProbePossitive =8; //Temp Probe power connected to pin 9
const int TempProbeNegative=9; //Temp Probe Negative connected to pin 8
//***************************** END Of Recomended User Inputs *****************************************************************//
OneWire oneWire(ONE_WIRE_BUS);// Setup a oneWire instance to communicate with any OneWire devices.
DallasTemperature sensors(&oneWire);// Pass our oneWire reference to Dallas Temperature.
float Temperature=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;
//*********************************Setup - runs Once and sets pins etc ******************************************************//
void setup()
{
Serial.begin(9600);
pinMode(TempProbeNegative , OUTPUT ); //seting ground pin as output for tmp probe.
digitalWrite(TempProbeNegative , LOW );//Seting it to ground so it can sink current.
pinMode(TempProbePossitive , OUTPUT );//ditto but for positive.
digitalWrite(TempProbePossitive , HIGH );
pinMode(ECPin,INPUT);
pinMode(ECPower,OUTPUT);//Setting pin for sourcing current.
pinMode(ECGround,OUTPUT);//setting pin for sinking current.
digitalWrite(ECGround,LOW);//We can leave the ground connected permanantly.
delay(100);// gives sensor time to settle.
sensors.begin();
delay(100);
//** Adding Digital Pin Resistance to [25 ohm] to the static Resistor *********//
// Consule Read-Me for Why, or just accept it as true.
R1=(R1+Ra);// Taking into acount Powering Pin Resitance.
Serial.println("ElCheapo Arduino EC-PPM measurments");
Serial.println("By: Michael Ratcliffe [email protected]");
Serial.println("Free software: you can redistribute it and/or modify it under GNU ");
Serial.println("");
Serial.println("Make sure Probe and Temp Sensor are in Solution and solution is well mixed");
Serial.println("");
Serial.println("Measurments at 5's Second intervals [Dont read Ec morre than once every 5 seconds]:");
};
//******************************************* End of Setup **********************************************************************//
//************************************* Main Loop - Runs Forever ***************************************************************//
//Moved Heavy Work To subroutines so you can call them from main loop without cluttering the main loop.
void loop()
{
GetEC(); //Calls Code to Go into GetEC() Loop [Below Main Loop] dont call this more that 1/5 hhz [once every five seconds] or you will polarise the water.
PrintReadings(); // Cals Print routine [below main loop]
delay(5000);
}
//************************************** End Of Main Loop **********************************************************************//
//************ This Loop Is called From Main Loop************************//
void GetEC(){
//*********Reading Temperature Of Solution *******************//
sensors.requestTemperatures();// Send the command to get temperatures.
Temperature=sensors.getTempCByIndex(0); //Stores Value in Variable.
//************Estimates Resistance of Liquid ****************//
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);
//***************** Converts to EC **************************//
Vdrop= (Vin*raw)/1024.0;
Rc=(Vdrop*R1)/(Vin-Vdrop);
Rc=Rc-Ra; //acounting for Digital Pin Resitance.
EC = 1000/(Rc*K);
//*************Compensating For Temperaure********************//
EC25 = EC/ (1+ TemperatureCoef*(Temperature-25.0));
ppm=(EC25)*(PPMconversion*1000);
;}
//************************** End OF EC Function ***************************//
//***This Loop Is called From Main Loop- Prints to serial usefull info ***//
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(Temperature);
Serial.println(" *C ");
/*
//********** Usued for Debugging ************
Serial.print("Vdrop: ");
Serial.println(Vdrop);
Serial.print("Rc: ");
Serial.println(Rc);
Serial.print(EC);
Serial.println("Siemens");
//********** end of Debugging Prints *********
*/
};[/CODE]
Arkadaşlar ppm prob kablosuna göre değişiyor diye yazı okumuştum
K değerini değiştrdim ama tam istediğim gibi sonuç alamadım k=0.70;
Yaptım birincisi çeşme suyu ikincisi az olan arıtılmış su --> çeşme suyu 165 civarı ve artı. S. 35 civarı olması lazım 0.75 yapıyourm değerler azalıyor tam tutturamadım.
Bu sitedeki düzeneği yapmaya çalışıyorum ve aynı kodları ve bağlantıları yapıyor ama istediğim gibi ppm vermiyor. Lütfn bir bakabilir miyiz kaç gündür bir sonuca varamadım.
Kodlarım:
[CODE title="tds"]/*
ElCheapo Arduino EC-PPM measurments.
This scrip uses a common USA two prong plug and a 47Kohm Resistor to measure the EC/PPM of a Aquaponics/Hydroponics Sytem.
You could modift this code to Measure other liquids if you change the resitor and values at the top of the code.
This Program will give you a temperature based feed controller. See Read me in download file for more info.
28/8/2015 Michael Ratcliffe [email protected]
This program is free software: you can redistribute it and/or modify.
it under the terms of the GNU General Public License as published by.
the Free Software Foundation, either version 3 of the License, or.
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of.
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the.
GNU General Public License for more details.
You should have received a copy of the GNU General Public License.
along with this program. If not, see .
Parts:
-Arduino - Uno/Mega
-Standard American two prong plug.
-1 kohm resistor.
-DS18B20 Waterproof Temperature Sensor.
Limitations:
-
-
See www.MichaelRatcliffe.com/Projects for a Pinout and user guide or consult the Zip you got this code from.
*/
//************************** Libraries Needed To Compile The Script [See Read me In Download] ***************//
// Both below Library are custom ones [ SEE READ ME In Downloaded Zip If You Dont Know how To install] Use them or add a pull up resistor to the temp probe.
#include <OneWire.h>
#include <DallasTemperature.h>
//************************* User Defined Variables ********************************************************//
//##################################################################################
//----------- Do not Replace R1 with a resistor lower than 300 ohms ------------
//##################################################################################
int R1= 1000;
int Ra=25; //Resistance of powering Pins.
int ECPin= A0;
int ECGround=A1;
int ECPower =A4;
//*********** Converting to ppm [Learn to use EC it is much better**************//
// Hana [USA] PPMconverion: 0.5
// Eutech [EU] PPMconversion: 0.64
//Tranchen [Australia] PPMconversion: 0.7
// Why didnt anyone standardise this?
float PPMconversion=0.7;
//*************Compensating for temperature ************************************//
//The value below will change depending on what chemical solution we are measuring.
//0.019 is generaly considered the standard for plant nutrients [google "Temperature compensation EC" for more info.
float TemperatureCoef = 0.019; //this changes depending on what chemical we are measuring.
//********************** Cell Constant For Ec Measurements *********************//
//Mine was around 2.9 with plugs being a standard size they should all be around the same.
//But If you get bad readings you can use the calibration script and fluid to get a better estimate for K
float K=2.88;
//************ Temp Probe Related *********************************************//
#define ONE_WIRE_BUS 10 // Data wire For Temp Probe is plugged into pin 10 on the Arduino.
const int TempProbePossitive =8; //Temp Probe power connected to pin 9
const int TempProbeNegative=9; //Temp Probe Negative connected to pin 8
//***************************** END Of Recomended User Inputs *****************************************************************//
OneWire oneWire(ONE_WIRE_BUS);// Setup a oneWire instance to communicate with any OneWire devices.
DallasTemperature sensors(&oneWire);// Pass our oneWire reference to Dallas Temperature.
float Temperature=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;
//*********************************Setup - runs Once and sets pins etc ******************************************************//
void setup()
{
Serial.begin(9600);
pinMode(TempProbeNegative , OUTPUT ); //seting ground pin as output for tmp probe.
digitalWrite(TempProbeNegative , LOW );//Seting it to ground so it can sink current.
pinMode(TempProbePossitive , OUTPUT );//ditto but for positive.
digitalWrite(TempProbePossitive , HIGH );
pinMode(ECPin,INPUT);
pinMode(ECPower,OUTPUT);//Setting pin for sourcing current.
pinMode(ECGround,OUTPUT);//setting pin for sinking current.
digitalWrite(ECGround,LOW);//We can leave the ground connected permanantly.
delay(100);// gives sensor time to settle.
sensors.begin();
delay(100);
//** Adding Digital Pin Resistance to [25 ohm] to the static Resistor *********//
// Consule Read-Me for Why, or just accept it as true.
R1=(R1+Ra);// Taking into acount Powering Pin Resitance.
Serial.println("ElCheapo Arduino EC-PPM measurments");
Serial.println("By: Michael Ratcliffe [email protected]");
Serial.println("Free software: you can redistribute it and/or modify it under GNU ");
Serial.println("");
Serial.println("Make sure Probe and Temp Sensor are in Solution and solution is well mixed");
Serial.println("");
Serial.println("Measurments at 5's Second intervals [Dont read Ec morre than once every 5 seconds]:");
};
//******************************************* End of Setup **********************************************************************//
//************************************* Main Loop - Runs Forever ***************************************************************//
//Moved Heavy Work To subroutines so you can call them from main loop without cluttering the main loop.
void loop()
{
GetEC(); //Calls Code to Go into GetEC() Loop [Below Main Loop] dont call this more that 1/5 hhz [once every five seconds] or you will polarise the water.
PrintReadings(); // Cals Print routine [below main loop]
delay(5000);
}
//************************************** End Of Main Loop **********************************************************************//
//************ This Loop Is called From Main Loop************************//
void GetEC(){
//*********Reading Temperature Of Solution *******************//
sensors.requestTemperatures();// Send the command to get temperatures.
Temperature=sensors.getTempCByIndex(0); //Stores Value in Variable.
//************Estimates Resistance of Liquid ****************//
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);
//***************** Converts to EC **************************//
Vdrop= (Vin*raw)/1024.0;
Rc=(Vdrop*R1)/(Vin-Vdrop);
Rc=Rc-Ra; //acounting for Digital Pin Resitance.
EC = 1000/(Rc*K);
//*************Compensating For Temperaure********************//
EC25 = EC/ (1+ TemperatureCoef*(Temperature-25.0));
ppm=(EC25)*(PPMconversion*1000);
;}
//************************** End OF EC Function ***************************//
//***This Loop Is called From Main Loop- Prints to serial usefull info ***//
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(Temperature);
Serial.println(" *C ");
/*
//********** Usued for Debugging ************
Serial.print("Vdrop: ");
Serial.println(Vdrop);
Serial.print("Rc: ");
Serial.println(Rc);
Serial.print(EC);
Serial.println("Siemens");
//********** end of Debugging Prints *********
*/
};[/CODE]
Arkadaşlar ppm prob kablosuna göre değişiyor diye yazı okumuştum
K değerini değiştrdim ama tam istediğim gibi sonuç alamadım k=0.70;
Yaptım birincisi çeşme suyu ikincisi az olan arıtılmış su --> çeşme suyu 165 civarı ve artı. S. 35 civarı olması lazım 0.75 yapıyourm değerler azalıyor tam tutturamadım.
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