//https://iotprojectsideas.com/bme680-indoor-air-quality-monitoring-with-esp32/

#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include "bsec.h"
#include <WiFi.h>

#define SEALEVELPRESSURE_HPA (1013.25)
 
Bsec iaqSensor;
String output;

float temperature;
float humidity;
float pressure;
float IAQ;
float carbon;
float VOC;
const char* IAQsts;
 
Adafruit_SSD1306 display = Adafruit_SSD1306(128, 64, &Wire);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  delay(100);
  Wire.begin();
 
  Serial.println(F("Starting..."));
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
 
  Serial.println("OLED begun");
 
  display.display();
  delay(100);
  display.clearDisplay();
  display.display();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setRotation(0);
  
  }
     
  iaqSensor.begin(BME680_I2C_ADDR_SECONDARY, Wire);
  

  checkIaqSensorStatus();
  bsec_virtual_sensor_t sensorList[10] = {
    BSEC_OUTPUT_RAW_TEMPERATURE,
    BSEC_OUTPUT_RAW_PRESSURE,
    BSEC_OUTPUT_RAW_HUMIDITY,
    BSEC_OUTPUT_RAW_GAS,
    BSEC_OUTPUT_IAQ,
    BSEC_OUTPUT_STATIC_IAQ,
    BSEC_OUTPUT_CO2_EQUIVALENT,
    BSEC_OUTPUT_BREATH_VOC_EQUIVALENT,
    BSEC_OUTPUT_SENSOR_HEAT_COMPENSATED_TEMPERATURE,
    BSEC_OUTPUT_SENSOR_HEAT_COMPENSATED_HUMIDITY,
  };
 
  iaqSensor.updateSubscription(sensorList, 10, BSEC_SAMPLE_RATE_LP);
  checkIaqSensorStatus();
  }
 
void loop() {
  
  display.setCursor(0,0);
  display.clearDisplay();
 
  unsigned long time_trigger = millis();
  if (iaqSensor.run()) { // If new data is available
    output = String(time_trigger);
    output += ", " + String(iaqSensor.rawTemperature);
    output += ", " + String(iaqSensor.pressure);
    output += ", " + String(iaqSensor.rawHumidity);
    output += ", " + String(iaqSensor.gasResistance);
    output += ", " + String(iaqSensor.iaq);
    output += ", " + String(iaqSensor.iaqAccuracy);
    output += ", " + String(iaqSensor.temperature);
    output += ", " + String(iaqSensor.humidity);
    output += ", " + String(iaqSensor.staticIaq);
    output += ", " + String(iaqSensor.co2Equivalent);
    output += ", " + String(iaqSensor.breathVocEquivalent);
    Serial.println(output);
  } else {
    checkIaqSensorStatus();
  }
 
  Serial.print("Temperature = "); 
  Serial.print(iaqSensor.temperature); 
  Serial.println(" *C");
  display.print("Temperature: "); 
  display.print(iaqSensor.temperature); 
  display.println(" *C");
 
  Serial.print("Pressure = "); 
  Serial.print(iaqSensor.pressure / 100.0); 
  Serial.println(" hPa");
  display.print("Pressure: "); 
  display.print(iaqSensor.pressure / 100); 
  display.println(" hPa");
 
  Serial.print("Humidity = "); 
  Serial.print(iaqSensor.humidity); 
  Serial.println(" %");
  display.print("Humidity: "); 
  display.print(iaqSensor.humidity); 
  display.println(" %");
 
  Serial.print("IAQ = "); 
  Serial.print(iaqSensor.staticIaq); 
  Serial.println(" PPM");
  display.print("IAQ: "); 
  display.print(iaqSensor.staticIaq); 
  display.println(" PPM");
 
  Serial.print("CO2 equiv = "); 
  Serial.print(iaqSensor.co2Equivalent); 
  Serial.println(" PPM");
  display.print("CO2eq: "); 
  display.print(iaqSensor.co2Equivalent); 
  display.println(" PPM");
 
  Serial.print("Breath VOC = "); 
  Serial.print(iaqSensor.breathVocEquivalent); 
  Serial.println(" PPM");
  display.print("VOC: "); 
  display.print(iaqSensor.breathVocEquivalent); 
  display.println(" PPM");