Arduino code

/*!

  * @file  ReadOxygenData.ino

  * @brief Read oxygen concentration ,The unit is concentration percent (% vol).

  * @n step: we must first determine the iic device address, will dial the code switch A0, A1 (ADDRESS_0 for [0 0]), (ADDRESS_1 for [1 0]), (ADDRESS_2 for [0 1]), (ADDRESS_3 for [1 1]).

  * @n       And then read the data.

  * @n note: it takes time to stable oxygen concentration, about 8 minutes.

  *

  * @n The experimental phenomenon is that a certain percentage of oxygen concentration is printed on the serial port.

  * @n Because the oxygen concentration in oxygen air is certain, the data will not be greater than 25% vol.

  *

  * @copyright   Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)

  * @licence     The MIT License (MIT)

  * @author      ZhixinLiu(zhixin.liu@dfrobot.com)

  * @version     V0.2

  * @date        2019-10-10

  * @get         from https://www.dfrobot.com

  * @url   */

//

//    FILE: CozirDemoSoftwareSerial.ino

//  AUTHOR: Rob Tillaart

// VERSION: 0.1.1

// PURPOSE: demo of Cozir lib

//    DATE: 2015-jan-17

//     URL: http://forum.arduino.cc/index.php?topic=91467.0

//

#include "cozir.h"

#include "SoftwareSerial.h"

#include <TM1637.h>

 

#include <DFRobot_OxygenSensor.h>

#include "DFRobot_OxygenSensor.h"

#define COLLECT_NUMBER    10

#define Oxygen_IICAddress ADDRESS_3

DFRobot_OxygenSensor Oxygen;

 

SoftwareSerial sws(12, 13);

 

COZIR czr(&sws);

 

const int CO2solenoidPin = 4;

const int O2solenoidPin = 7;                         

int CLK = 2;

int DIO = 3;

int buttonPin = 8;

int buttonState = 0;

float O2previous = 0;

 

TM1637 tm(CLK, DIO);

 

 

void setup() {

  // put your setup code here, to run once:

  sws.begin(9600);

  czr.init();

 

  tm.init();

 

  tm.set(1);

 

  Serial.begin(9600);

  while (!Oxygen.begin(Oxygen_IICAddress)) {

    Serial.println("I2c device number error !");

    delay(1000);

  }

  Serial.println("I2c connect success !");

  while (!Serial) {

 

  }

  Serial.print("Cozir SoftwareSerial: ");

  Serial.println(COZIR_LIB_VERSION);

  Serial.println();

 

  pinMode(O2solenoidPin, OUTPUT);

  pinMode(buttonPin, INPUT);

  pinMode(CO2solenoidPin, OUTPUT);

 

  delay(1000);

 

}

 

void loop() {

  // put your main code here, to run repeatedly:

  float t = czr.Celsius();

  float f = czr.Fahrenheit();

  float h = czr.Humidity();

  uint32_t c = czr.CO2();

  int CO2data = c * 10;

  if (CO2data >= 0) {

    Serial.print(millis());

    Serial.print(", ");

    Serial.print (CO2data);

    Serial.println (", ");

    int CO2printO = CO2data / 100;

    tm.display (0, CO2printO / 1000);   // prints CO2 value in %

    tm.display (1, CO2printO / 100);

    tm.point (1);

    tm.display (2, CO2printO / 10 % 10);

    tm.display (3 , CO2printO % 10);

    delay (2000);

    digitalWrite (CO2solenoidPin, HIGH);

    delay (400);

    digitalWrite (CO2solenoidPin, LOW);

    delay (2000);

    if (buttonState == HIGH){

      tm.display (0, 13);

      tm.display (1, 0);

      tm.point (0);

      tm.display (2, 0);

      tm. display (3, 7);

      delay (30000);}

      else {

        delay (100);

      }

  }

  if (CO2data < 0) {

    Serial.print(millis());

    Serial.print (", ");

    Serial.print ((64000 + CO2data));

    Serial.println (", ");

    tm.display (0, ((64000 + CO2data)/100) / 1000);   // prints CO2 value in %

    tm.display (1, ((64000 + CO2data)/100) / 100);

    tm.point (1);

    tm.display (2, ((64000 + CO2data)/100) / 10 % 10);

    tm.display (3 , ((64000 + CO2data)/100) % 10);

    delay (1000);

    if (CO2data < -22000 & CO2data > -31000){

      digitalWrite (CO2solenoidPin, HIGH);

      delay (400);

      digitalWrite (CO2solenoidPin, LOW);

      delay (1000);

      if (buttonState == HIGH){

      tm.display (0, 13);

      tm.display (1, 0);

      tm.point (0);

      tm.display (2, 0);

      tm. display (3, 7);

      delay (30000);}

      else {

        delay (100);

      }

    }

    if (CO2data < -14700 & CO2data > -20000){

      digitalWrite (CO2solenoidPin, HIGH);

      delay (102);

      digitalWrite (CO2solenoidPin, LOW);

      delay (1000);

      if (buttonState == HIGH){

      tm.display (0, 13);

      tm.display (1, 0);

      tm.point (0);

      tm.display (2, 0);

      tm. display (3, 7);

      delay (30000);}

      else {

        delay (100);

      }

    }

    if (buttonState == HIGH){

      tm.display (0, 13);

      tm.display (1, 0);

      tm.point (0);

      tm.display (2, 0);

      tm. display (3, 7);

      delay (30000);}

      else {

        delay (100);

      }

     delay (2000);

    }

  float oxygenData = Oxygen.ReadOxygenData(COLLECT_NUMBER);

  int O2data = oxygenData * 100;

  Serial.print(millis());

  Serial.print(", , ");

  Serial.println(oxygenData);

  delay(250);

  tm.display (0, O2data / 1000);

  tm.display (1, O2data / 100 % 10);

  tm.point (1);

  tm.display (2, O2data / 10 % 10);

  tm.display (3, O2data % 10);

  delay (1000);

 

  if (oxygenData < 4.98){

    O2previous = oxygenData;}

 

  if (oxygenData >= 4.98 && oxygenData < 5.08 && O2previous <= oxygenData) {        //Change % as needed

    digitalWrite(O2solenoidPin, HIGH);

    delay (700);                  //Change delay as needed

    digitalWrite(O2solenoidPin, LOW);

    buttonState = digitalRead (buttonPin);

    if (buttonState == HIGH){

      tm.display (0, 13);

      tm.display (1, 0);

      tm.point (0);

      tm.display (2, 0);

      tm. display (3, 7);

      delay (30000);}

      else {

        delay (100);

      }

    O2previous = oxygenData;

    delay (2000);

  }

  if (oxygenData >= 5.08 && oxygenData < 5.2) {        //Change % as needed

    digitalWrite(O2solenoidPin, HIGH);

    delay (1400);                  //Change delay as needed

    digitalWrite(O2solenoidPin, LOW);

    buttonState = digitalRead (buttonPin);

    if (buttonState == HIGH){

      tm.display (0, 13);

      tm.display (1, 0);

      tm.point (0);

      tm.display (2, 0);

      tm. display (3, 7);

      delay (30000);}

     else {

        delay (100);

      }

    O2previous = oxygenData;

    delay (5000);

  } 

  if (oxygenData >= 5.2 && oxygenData <= 6.3) {        //Change % as needed

    digitalWrite(O2solenoidPin, HIGH);

    delay (800);                  //Change delay as needed

    digitalWrite(O2solenoidPin, LOW);

    buttonState = digitalRead (buttonPin);

    if (buttonState == HIGH){

      tm.display (0, 13);

      tm.display (1, 0);

      tm.point (0);

      tm.display (2, 0);

      tm. display (3, 7);

      delay (30000);}

      else {

        delay (100);

      }

    delay (2500);

  }

  if (oxygenData > 6.3 && oxygenData <= 7){

    digitalWrite (O2solenoidPin, HIGH);

    delay (950);

    digitalWrite (O2solenoidPin, LOW);

    buttonState = digitalRead (buttonPin);

    if (buttonState == HIGH){

      tm.display (0, 13);

      tm.display (1, 0);

      tm.point (0);

      tm.display (2, 0);

      tm. display (3, 7);

      delay (30000);}

      else {

        delay (100);

      }

    delay (2000);

  }

  if (oxygenData >= 7 && oxygenData < 8.5) {        //Change % as needed

    digitalWrite(O2solenoidPin, HIGH);

    delay (1200);                  //Change delay as needed

    digitalWrite(O2solenoidPin, LOW);

    buttonState = digitalRead (buttonPin);

    if (buttonState == HIGH){

      tm.display (0, 13);

      tm.display (1, 0);

      tm.point (0);

      tm.display (2, 0);

      tm. display (3, 7);

      delay (30000);}

      else {

        delay (100);

      }

    delay (2000);

  } 

  if (oxygenData >= 8.5) {

    digitalWrite (O2solenoidPin, HIGH);

    delay (3000);

    digitalWrite (O2solenoidPin, LOW);

    buttonState = digitalRead (buttonPin);

    if (buttonState == HIGH){

      tm.display (0, 13);

      tm.display (1, 0);

      tm.point (0);

      tm.display (2, 0);

      tm. display (3, 7);

      delay (30000);}

      else {

        delay (100);

      }

    delay (2000);

  }

  buttonState = digitalRead (buttonPin);

  if (buttonState == HIGH){

    tm.display (0, 13);

    tm.display (1, 0);

    tm.point (0);

    tm.display (2, 0);

    tm. display (3, 7);

    delay (30000);}

    else {

      delay (100);

  }

}