MEGR 3171 Fish Tank Monitoring System

// This #include statement was automatically added by the Particle IDE.
#include <DS18B20.h>

#include <math.h>

const int      MAXRETRY          = 16;
const uint32_t msSAMPLE_INTERVAL = 30000;
const uint32_t msMETRIC_PUBLISH  = 30000;

const int16_t dsVCC  = D2;
const int16_t dsData = D3;
const int16_t dsGND  = D4;

// Sets Pin D3 as data pin and the only sensor on bus
DS18B20  ds18b20(dsData, true); 

char     szInfo[64];
double   celsius;
double   fahrenheit;
uint32_t msLastMetric;
uint32_t msLastSample;

void setup() {
  Serial.begin(115200); //begins serial communication
  
  pinMode(dsGND, OUTPUT); //sets up pin as output   
  digitalWrite(dsGND, LOW);  // sets up pin as ground
  pinMode(dsVCC, OUTPUT); //sets up pin as output
  digitalWrite(dsVCC, HIGH); //sets up pin with 5 volts

  delay(1000);
}

void loop() {
  if (millis() - msLastSample >= msSAMPLE_INTERVAL){
    getTemp();
  }

  if (millis() - msLastMetric >= msMETRIC_PUBLISH){
    Serial.println("Publishing now.");
    publishData(); //starts publishing data from sensor
  }
}

void publishData(){
  sprintf(szInfo, "%2.2f", fahrenheit); //converts data to fahrenheit 
  Particle.publish("dsTmp", szInfo, PRIVATE); //this publishes the data to the particle cloud and allows thingspeak to access the data
  msLastMetric = millis();
}

void getTemp(){
  float _temp;
  int   i = 0;

  do {
    _temp = ds18b20.getTemperature();
  } while (!ds18b20.crcCheck() && MAXRETRY > i++);

  if (i < MAXRETRY) {
    celsius = _temp;
    fahrenheit = ds18b20.convertToFahrenheit(_temp); //Converts temperature to fahrenheit if correct conditions are met
    Serial.println(fahrenheit); //prints temperature value
  }
  else {
    celsius = fahrenheit = NAN; //if celsuis and fahrentheit are equal after converted then it will be printed "Not A Number"
    Serial.println("Invalid reading"); //This is an invalid reading
  }
  msLastSample = millis();
  
   if (fahrenheit<=74){
    Particle.publish("fish_tank_water_cold", "COLD",PRIVATE); //establishes the acceptable range for the temperature, if the temperature if less than or equal to 74 then the IFTTT will be triggered
    delay(1000);
    
}

else if (fahrenheit>=81){
    Particle.publish("fish_tank_water_hot", "HOT",PRIVATE); // establishes the acceptable range for the temperature, if the temperature is greater than or equal to 81 then the IFTTT will be triggered
    delay(1000);
}
}

/*
 * file DFRobot_PH.ino
 * @ https://github.com/DFRobot/DFRobot_PH
 *
 * This is the sample code for Gravity: Analog pH Sensor / Meter Kit V2, SKU:SEN0161-V2
 * In order to guarantee precision, a temperature sensor such as DS18B20 is needed, to execute automatic temperature compensation.
 * You can send commands in the serial monitor to execute the calibration.
 * Serial Commands:
 *   enterph -> enter the calibration mode
 *   calph   -> calibrate with the standard buffer solution, two buffer solutions(4.0 and 7.0) will be automaticlly recognized
 *   exitph  -> save the calibrated parameters and exit from calibration mode
 *
 * Copyright   [DFRobot](http://www.dfrobot.com), 2018
 * Copyright   GNU Lesser General Public License
 *
 * version  V1.0
 * date  2018-04
 */

#include "DFRobot_PH.h"
//#include <EEPROM.h>

#define PH_PIN A1
float voltage,phValue,temperature = 25;
DFRobot_PH ph;

void setup()
{
    Serial.begin(115200);  
    ph.begin();
}

void loop()
{
    static unsigned long timepoint = millis();
    if(millis()-timepoint>3000U){                  //time interval: 3s
        timepoint = millis();
        //temperature = readTemperature();         // read your temperature sensor to execute temperature compensation
        voltage = analogRead(PH_PIN)/1024.0*5000;  // read the voltage
        phValue = ph.readPH(voltage,temperature);  // convert voltage to pH with temperature compensation
        Serial.print("temperature:");
        Serial.print(temperature,1);
        Serial.print("^C  pH:");
        Serial.println(phValue,2);
    }
    ph.calibration(voltage,temperature);           // calibration process by Serail CMD
    
    Particle.publish("phValue", String("phValue"));
    
}