MEGR 3171 - Group 22 - Environment Comparison Circuit

//Cesar Valverde & Thomas Cobb
//MEGR3171 UNC CHARLOTTE
//Introduction to Instrumentation
// BME280 Sensor 1


#include <Adafruit_BME280.h> //Library for BME280 Sensor
/***************************************************************************
  This is a library for the BME280 humidity, temperature & pressure sensor

  Designed specifically to work with the Adafruit BME280 Breakout
  ----> http://www.adafruit.com/products/2650

  These sensors use I2C or SPI to communicate, 2 or 4 pins are required
  to interface. The device's I2C address is either 0x76 or 0x77.

  Adafruit invests time and resources providing this open source code,
  please support Adafruit andopen-source hardware by purchasing products
  from Adafruit!

  Written by Limor Fried & Kevin Townsend for Adafruit Industries.
  BSD license, all text above must be included in any redistribution
  See the LICENSE file for details.
 ***************************************************************************/
 
 
#include <JsonParserGeneratorRK.h> //library that helps with the ThingsSpeak Integration


#include <Wire.h>
#include <SPI.h>
#define SEALEVELPRESSURE_HPA (1013.25)  //Constant needed to convert presssure
#include "math.h" //enables math operators 



Adafruit_BME280 bme; // I2C

unsigned long delayTime; //setting delay variable

void setup() {
    Serial.begin(9600);
    while(!Serial);    // used to get serial running
    Serial.println(F("BME280 Sensor")); 

    unsigned status;
    
    
    //Error check for BME280 Sensor
        status = bme.begin();  
        if (!status) {
        Serial.println("Could not find a valid BME280 sensor, check wiring, address, sensor ID!");
        Serial.print("SensorID was: 0x"); Serial.println(bme.sensorID(),16);
        Serial.print("        ID of 0xFF probably means a bad address, a BMP 180 or BMP 085\n");
        Serial.print("   ID of 0x56-0x58 represents a BMP 280,\n");
        Serial.print("        ID of 0x60 represents a BME 280.\n");
        Serial.print("        ID of 0x61 represents a BME 680.\n");
        while (1) delay(10);
    }
    
    Serial.println("BME280");
    
    delayTime = 1200000; //Delay of 20 min to read bme280 sensor
    
    Serial.println();
    

Particle.subscribe("TJ-temp",Compare); //particle subscribe to particle 2 event

    pinMode(D7, OUTPUT); //setting up on-board led as an ouput

}


void loop() { 
    printValues(); //Loop to print bme 280 sensor values
    delay(delayTime); //loop the delay between output values
}


void printValues() {  //Function that serial prints the bme sensors values 

    
    Serial.print("Temperature = ");
    Serial.print(bme.readTemperature()); //temperature reading
    Serial.println(" *C");

    Serial.print("Pressure = ");
    Serial.print(bme.readPressure() / 100.0F); //pressure reading
    Serial.println(" hPa");

    Serial.print("Approx. Altitude = ");
    Serial.print(bme.readAltitude(SEALEVELPRESSURE_HPA)); //altitude reading
    Serial.println(" m");

    Serial.print("Humidity = ");
    Serial.print(bme.readHumidity()); //humidity reading
    Serial.println(" %");

    Serial.println(); //print value
  
    //create a payload for JSON Generator
  createEventPayload(bme.readTemperature(), bme.readPressure() / 100.0F, bme.readAltitude(SEALEVELPRESSURE_HPA), bme.readHumidity());
}



//Calling the JSON Generator
 void createEventPayload(int temp, int press, int altit, int humid) //setting up the JSON generator
 {
     JsonWriterStatic<256> jw;
      {
          JsonWriterAutoObject obj(&jw);
          jw.insertKeyValue ("temp", bme.readTemperature());
          jw.insertKeyValue ("press", bme.readPressure() / 100.0F);
          jw.insertKeyValue ("altit", bme.readAltitude(SEALEVELPRESSURE_HPA));
          jw.insertKeyValue ("humid", bme.readHumidity());
      }
     Particle.publish("cv-bme280",jw.getBuffer(), PRIVATE); //publishing JSON data
 }
 

//Running the comparing feature whenever sensor 2 data is published
void Compare(String event, String data){
    event == "TJ-temp";
    int dataval;         //setting up the integer
dataval = String(data).toInt(); //naming the data from the event as the integer
     
        //comparison of data
    if (dataval < bme.readTemperature() ){        //if the incoming data is less than the temperature read from the sensor
             
             //publish that location of particle 1 is better
             Particle.publish("BME280_Compare","Cesar's Place", PRIVATE);
             
             //turn on led
             digitalWrite(D7, HIGH);

    } 
    else {                                      // if incoming data is greater than the temperature read from the sensor
            //publish that the location of particle 2 is better
            Particle.publish("BME280_Compare","Thomas' Place", PRIVATE);
            
            //turn off led
            digitalWrite(D7, LOW);
        }
    }