thermocircuit

#include <Wire.h>
//================= AD converter ADS1115 =================
#include <Adafruit_ADS1015.h>
int tecla_lida_1 = 0;
const int CntLimit = 200; // limite aproximadamente 8000
int cnt = 0;
int CntNow = 0;
Adafruit_ADS1115 ads_ADC1 (0x48);   // Construct an ads1115 at address: 0x48 (ADD-GND)
int16_t  intVolt_Rref ; int16_t  intVolt_Rt; int16_t  intCurrent_Ir; int16_t  intT_par;
float Volt_Rref[CntLimit];
float Volt_Rt[CntLimit] ;
unsigned long time_cnt[CntLimit];

int delay_measure=300;

#include "max6675.h"
int ktcSO = 10;
int ktcCS = 9;
int ktcCLK = 8; //clock

MAX6675 ktc(ktcCLK, ktcCS, ktcSO);

//Adafruit_ADS1115 ads_ADC2 (0x49);   // Construct an ads1115 at address: 0x48 (ADD-VDD)
float T_par[CntLimit] ;
float Current_I_H[CntLimit] ;
float Current_I[CntLimit] ;
//relays
//int pin_Relay_1 = 4;
//int pin_Relay_2 = 5;
//int pin_Relay_3 = 6;
//int pin_Relay_4 = 7;
int PinHeater = 7;
int HeaterState = LOW;
char arrCharBuffer[CntLimit]; char printBuffer[128];
float FactorMVoltperBit = 0.00018714 ; // 4920/26290
float FactorPotentiometer = 34.4; // potential drop across the resistors network for electrolysis Voltage


void setup(void)
{
  Wire.begin(); // join i2c bus (address optional for master)
  Serial.begin(9600);     // opens serial port, sets data rate to 57600 bps

  pinMode(PinHeater, OUTPUT);
  HeaterState = LOW;
  digitalWrite(PinHeater, HeaterState);

  // The ADC input range (or gain) can be changed via the following
  // functions, but be careful never to exceed VDD +0.3V max, or to
  // exceed the upper and lower limits if you adjust the input range!
  // Setting these values incorrectly may destroy your ADC!
  //                                                                ADS1015  ADS1115
  //                                                                -------  -------
  // ads.setGain(GAIN_TWOTHIRDS);  // 2/3x gain +/- 6.144V  1 bit = 3mV      0.1875mV (default)
  // ads.setGain(GAIN_ONE);        // 1x gain   +/- 4.096V  1 bit = 2mV      0.125mV
  // ads.setGain(GAIN_TWO);        // 2x gain   +/- 2.048V  1 bit = 1mV      0.0625mV
  // ads.setGain(GAIN_FOUR);       // 4x gain   +/- 1.024V  1 bit = 0.5mV    0.03125mV
  // ads.setGain(GAIN_EIGHT);      // 8x gain   +/- 0.512V  1 bit = 0.25mV   0.015625mV
  // ads.setGain(GAIN_SIXTEEN);    // 16x gain  +/- 0.256V  1 bit = 0.125mV  0.0078125mV


  ads_ADC1.begin(); // ads1115 ADC1 initialize
  ads_ADC1.setGain(GAIN_TWO);

  // ads_ADC2.begin(); // ads1115 ADC2 initialize
  //  ads_ADC2.setGain(GAIN_FOUR);
  //  Switch_Relays_Positive();

  Serial.println("LabIII. Experiment on thermomentry: Max. Applied V[R]=1.4V,Max. Applied V[Heater]=5V ");
}

void loop() {
  tecla_lida_1 = 0;
  Serial.println("[[l,L]/[H,h] Heater OFF/ON --- [m,M]Medida Manual --- [a,A] Automatico--- [P,p] Print Measurements");

  while (tecla_lida_1 != 10) {
    if (Serial.available() > 0) {
      tecla_lida_1 = Serial.read();
      //Serial.println(tecla_lida_1);
      switch (tecla_lida_1) {
        //        case 108:
        //          Switch_Relays_Positive();
        //          Serial.println(" Current Positive" );
        //          break;
        //        case 100:
        //          Switch_Relays_Negative();
        //          Serial.println(" Current Negative" );
        //          break;

        case 72: //H
        case 104: //h
          HeaterState = HIGH;
          digitalWrite(PinHeater, HeaterState);
          Serial.println(" Heater is ON" );
          break;

        case 76: //L
        case 108: //l
          HeaterState = LOW;
          digitalWrite(PinHeater, HeaterState);
          Serial.println(" Heater is OFF" );
          break;

        case 109: //m
        case 77: //M
          Serial.println("Start measuring manually .....");
          MeasureData();
          Serial.println("....finsihed measuring manually");
          break;

        case 65: //A
        case 97: //a
          Serial.println("Start measuring automatically .....");
          for (int j = cnt; j < CntLimit; j = j + 1) {
            MeasureData();
            delay(delay_measure);
            //             if (Serial.available() > 0) {
            //               tecla_lida_1 = Serial.read();
            //             if (tecla_lida_1 == 115 || tecla_lida_1 == 83)  break;
            //              }
          }
          Serial.println("...finished measuring automatically");
          cnt = 0;
          break;

        case 80:   //P
        case 112:  //p
          PrintMeasureData();
          break;

      } //switch
    }// serial
  } //while
}


/* ADCVoltageCh0 = (float)intVoltageADC0 * FactorMVoltperBit * FactorPotentiometer ;
    sprintf (arrCharBuffer, "Voltage channel 2 [V]= " );
    Serial.print (intVoltageADC2); Serial.print (" equivalent  ");
    Serial.print (arrCharBuffer);   Serial.println (ADCVoltageCh2, 5);
*/

void MeasureData() {
  int i;
  int dummyRref = 0;
  int dummyT = 0;
  int dummy3 = 0;
  float dummy4 = 0.0;
  int dummyCNT = 2; // quantas vezes é medido para fazer média

  for (i = 0; i < dummyCNT; i = i + 1) {
    dummyT =  dummyT + ads_ADC1.readADC_Differential_2_3(); // V_Rt
    delay(delay_measure);
   //  Serial.println(dummyT);
    dummyRref =  dummyRref +  ads_ADC1.readADC_Differential_0_1(); // V_Rref
   //      Serial.println(dummyRref);
    delay(delay_measure);
    //    Serial.println(dummyRref);
    dummy3 =  dummy3 + analogRead(A0); // heater current
    delay(delay_measure);
    dummy4 =  dummy4 + ktc.readCelsius();
    delay(delay_measure);
  }

  time_cnt[cnt] = millis();  //para contagem de "tempo"
  Volt_Rt[cnt] =  (1386.0 / 22020.0) * dummyT / dummyCNT;
  Volt_Rref[cnt] =  (1256.0 / 20099.0) * dummyRref / dummyCNT; // current ref
  Current_I_H[cnt] = (19.98 / 512.0) * (-512.0 + dummy3 / dummyCNT);
  T_par[cnt] = dummy4 / dummyCNT + 273.13;
  //    }
  // for (int cnt = 0; cnt < CntLimit; cnt = cnt + 1) {
  Serial.print("Counts=");
  Serial.print(cnt);
  Serial.print("; Time=");
  Serial.println(time_cnt[cnt]);

  Serial.print(" Temp K = ");
  Serial.print(T_par[cnt] );
  Serial.print("; I_Heater(A) = ");
  Serial.print(Current_I_H[cnt]);
  Serial.print(";   I [mA]=" );
  Current_I[cnt] = Volt_Rref[cnt] / (999.6);
  Serial.println(Current_I[cnt]);

  Serial.print(" V_Rref[mV]=");
  Serial.print(Volt_Rref[cnt]);
  Serial.print("; R1[Ohm]=");
  Serial.println(Volt_Rref[cnt] / Current_I[cnt]);

  Serial.print(" V_Rt[mV]=");
  Serial.print(Volt_Rt[cnt]);
  Serial.print("; R2[Ohm]=");
  Serial.println(Volt_Rt[cnt] / Current_I[cnt]);
  if  (cnt < CntLimit)
  {
    CntNow = cnt;
    cnt = cnt + 1;
  }
  else
  { cnt = 0;
    CntNow = 0;
  }

}
//void Switch_Relays_Positive()
//{
//  //first switcvh off relay 3 and 4
//  pinMode(pin_Relay_3, OUTPUT);
//  digitalWrite(pin_Relay_3, HIGH);
//  delay(1000);
//  pinMode(pin_Relay_4, OUTPUT);
//  digitalWrite(pin_Relay_4, HIGH);
//  delay(1000);
//
//  //Then swithch on 1 and 2
//  pinMode(pin_Relay_1, OUTPUT);
//  digitalWrite(pin_Relay_1, HIGH);
//  delay(1000);
//  pinMode(pin_Relay_2, OUTPUT);
//  digitalWrite(pin_Relay_2, HIGH);
//  // Then swtich back 3 and 4
//  delay(1000);
//  pinMode(pin_Relay_3, OUTPUT);
//  digitalWrite(pin_Relay_3, LOW);
//  delay(1000);
//  pinMode(pin_Relay_4, OUTPUT);
//  digitalWrite(pin_Relay_4, LOW);
//  delay(1000);
//}
//void Switch_Relays_Negative() {
//  //first switcvh off relay 3 and 4
//  pinMode(pin_Relay_3, OUTPUT);
//  digitalWrite(pin_Relay_3, HIGH);
//  delay(1000);
//  pinMode(pin_Relay_4, OUTPUT);
//  digitalWrite(pin_Relay_4, HIGH);
//  delay(1000);
//
//  //Then swithch on 1 and 2
//  pinMode(pin_Relay_1, OUTPUT);
//  digitalWrite(pin_Relay_1, LOW);
//  delay(1000);
//  pinMode(pin_Relay_2, OUTPUT);
//  digitalWrite(pin_Relay_2, LOW);
//  // Then swtich back 3 and 4
//  delay(1000);
//  pinMode(pin_Relay_3, OUTPUT);
//  digitalWrite(pin_Relay_3, LOW);
//  delay(1000);
//  pinMode(pin_Relay_4, OUTPUT);
//  digitalWrite(pin_Relay_4, LOW);
//  delay(1000);
//}
void PrintMeasureData() {
  Serial.print("#   ");
  Serial.print("t[ms]   ");
  Serial.print("T[K]    ");
  Serial.print("I_H(A)  ");
  Serial.print("I [mA]  " );
  Serial.print("V[mV]   ");
  Serial.print("R[Ohm]  ");
  Serial.print("V_Rt[mV]    ");
  Serial.println("R2[Ohm]   ");
  for (int i = 0; i <= CntNow; i = i + 1) {
    Serial.print(i);
    Serial.print("  ");
    Serial.print(time_cnt[i]);
    Serial.print("  ");
    Serial.print(T_par[i] );
    Serial.print("  ");
    Serial.print(Current_I_H[i]);
    Serial.print("  ");
    Serial.print(Current_I[i]);
    Serial.print("  ");
    Serial.print(Volt_Rref[i]);
    Serial.print("  ");
    Serial.print(Volt_Rref[i] / Current_I[i]);
    Serial.print("  ");
    Serial.print(Volt_Rt[i]);
    Serial.print("  ");
    Serial.println(Volt_Rt[i] / Current_I[i]);
  }
}