HTU21D_BME280_CCS811_microOLED.ino

/*
  HTU21D Humidity Sensor Example Code
  By: Nathan Seidle
  SparkFun Electronics
  Date: September 15th, 2013
  License: This code is public domain but you buy me a beer if you use this and we meet someday (Beerware license).

  Uses the HTU21D library to display the current humidity and temperature

  Open serial monitor at 9600 baud to see readings. Errors 998 if not sensor is detected. Error 999 if CRC is bad.

  Hardware Connections (Breakoutboard to Arduino):
  -VCC = 3.3V
  -GND = GND
  -SDA = A4 (use inline 330 ohm resistor if your board is 5V)
  -SCL = A5 (use inline 330 ohm resistor if your board is 5V)

*/

#include <Wire.h>

#include "SparkFunHTU21D.h" // include HTU21D library
//Create an instance of the object
HTU21D myHumidity;

float humd = 0;

#include <SFE_MicroOLED.h>  // Include the SFE_MicroOLED library
#define PIN_RESET 7
#define DC_JUMPER 1
MicroOLED oled(PIN_RESET, DC_JUMPER);    // I2C declaration

#include "SparkFunBME280.h"
BME280 mySensor;

float temp_C = 0;
float temp_F = 0;


#include <SparkFunCCS811.h>
#define CCS811_ADDR 0x5B //Default I2C Address
CCS811 myCCS811(CCS811_ADDR);

///////////////////////////////
// Display Mode Page Control //
///////////////////////////////
// This enum defines all of our display modes and their order.
enum t_displayModes {
  DISPLAY_HTU21D,
  DISPLAY_BME280_1,
  DISPLAY_BME280_2,
  DISPLAY_CCS811,
  DISPLAY_CUBE
};

const int NUM_DISPLAY_MODES = 5; // Number of values defined in enum above
volatile int displayMode = NUM_DISPLAY_MODES - 1; // Keeps track of current display page

const unsigned long DISPLAY_UPDATE_RATE = 4000; // Cycle display every 5 seconds
unsigned long lastDisplayUpdate = 0; // Stores time of last display update
unsigned long currentMillis = 0; // Stores time of last display update

float percentage = 0; //store percent for progress bar
int progressWidth = 0; // Width of progress bar depends on the [% * (64 pixels wide)]
int progressY = 0;     //location of the progress bar at the botton of the microOLED




int SCREEN_WIDTH = oled.getLCDWidth();
int SCREEN_HEIGHT = oled.getLCDHeight();

float d = 3;
float px[] = {
  -d,  d,  d, -d, -d,  d,  d, -d
};
float py[] = {
  -d, -d,  d,  d, -d, -d,  d,  d
};
float pz[] = {
  -d, -d, -d, -d,  d,  d,  d,  d
};

float p2x[] = {
  0, 0, 0, 0, 0, 0, 0, 0
};
float p2y[] = {
  0, 0, 0, 0, 0, 0, 0, 0
};

float r[] = {
  0, 0, 0
};

#define SHAPE_SIZE 600
// Define how fast the cube rotates. Smaller numbers are faster.
// This is the number of ms between draws.
//#define ROTATION_SPEED 0






void setup()
{
  Serial.begin(9600);
  Serial.println("HTU21D and BME280 Example !");

  delay(100);
  myHumidity.begin();// Wire.begin() is in HTU21D library

  delay(100);
  mySensor.beginI2C();//join CCS811

  delay(100);
  myCCS811.begin();//join CCS811
  //Wire.setClock(400000);   // Set clock speed to be the fastest for better communication (fast mode)


  oled.begin();    // Initialize the OLED
  oled.clear(ALL); // Clear the display's internal memory
  oled.display();  // Display what's in the buffer (splashscreen)
  delay(1000);     // Delay 1000 ms
  oled.clear(PAGE); // Clear the buffer.
}

void loop()
{
  humd = myHumidity.readHumidity();
  temp_C = myHumidity.readTemperature();
  temp_F = temp_C * (9.0 / 5.0) + 32.0;


  //get time based on how long the Arduino has been running
  currentMillis = millis();

  // Displaying °C and °F with a scroll bar

  // Another method of updating display:
  // The display will cycle itself every DISPLAY_UPDATE_RATE seconds
  if ( currentMillis >= (lastDisplayUpdate + DISPLAY_UPDATE_RATE + 1000) )
  {
    // Increment displayMode, next time through a new page will be displayed:
    displayMode = (displayMode + 1) % NUM_DISPLAY_MODES;

    // Update lastDisplayTime, so we don't come back for DISPLAY_UPDATE_RATE seconds
    lastDisplayUpdate = currentMillis;

  }

  oled.clear(PAGE);            // Clear the display
  updateDisplay();
  displayProgressBar(); // Draws a progress bar at the bottom of the screen
  oled.display();




  Serial.print("Time:");
  Serial.print(millis());
  Serial.print(" Temperature:");
  Serial.print(temp_C, 1);
  Serial.print("C ");
  Serial.print(temp_F, 1);
  Serial.print("F");
  Serial.print(" Humidity:");
  Serial.print(humd, 1);
  Serial.println("%");

  Serial.print(" Pressure: ");
  Serial.print(mySensor.readFloatPressure(), 0);
  Serial.print(" Pa");

  Serial.print(" Alt: ");
  //Serial.print(mySensor.readFloatAltitudeMeters(), 1);
  Serial.print(mySensor.readFloatAltitudeFeet(), 1);
  Serial.print(" Ft");

  Serial.print(" Temp: ");
  Serial.print(mySensor.readTempF(), 2);
  Serial.print(" F ");
  Serial.print(mySensor.readTempC(), 2);
  Serial.print(" C ");


  Serial.print("Humidity: ");
  Serial.print(mySensor.readFloatHumidity(), 0);
  Serial.print(" %");

  Serial.println();
  //delay(1000);

}//end loop




void updateDisplay() {

  switch (displayMode)
  {
    case DISPLAY_HTU21D:
      displayHTU21D();
      break;
    case DISPLAY_BME280_1:
      displayBME280_1();
      break;
    case DISPLAY_BME280_2:
      displayBME280_2();
      break;
    case DISPLAY_CCS811:
      displayCCS811();
      break;
    case DISPLAY_CUBE:
      drawCube();
      break;
  }

}



void displayHTU21D() {

  oled.setCursor(0, 0);        // Set cursor to top-left
  oled.setFontType(0);         // Smallest font
  oled.print("   HTU21D");   // Print

  oled.setCursor(0, 8);       // Set cursor to middle-ish
  oled.setFontType(1);         // medium font
  oled.print(String(temp_C, 2) + " C"); // Print temp, assuming that it is within room temp in tens
  oled.setCursor(0, 21);       // Set cursor to middle-ish
  oled.print(String(temp_F, 2) + " F");// Print temp, assuming that it is within room temp in tens
  oled.circle(50, 10, 1);      //"degree" sign after output values
  oled.circle(50, 22, 1);      //"degree" sign after output values


  oled.setCursor(0, 34);       // Set cursor to middle-ish
  oled.print(String(humd, 1) + "%RH");          // Print humid, assuming that it is within room temp in tens

}

void displayBME280_1() {

  oled.setCursor(0, 0);        // Set cursor to top-left
  oled.setFontType(0);         // Smallest font
  oled.print("   BME280");   // Print

  oled.setCursor(0, 8);       // Set cursor to middle-ish
  oled.setFontType(1);         // medium font
  oled.print(String(mySensor.readTempC(), 2) + " C"); // Print temp, assuming that it is within room temp in tens
  oled.setCursor(0, 21);       // Set cursor to middle-ish
  oled.print(String(mySensor.readTempF(), 2) + " F");// Print temp, assuming that it is within room temp in tens
  oled.circle(50, 10, 1);      //"degree" sign after output values
  oled.circle(50, 22, 1);      //"degree" sign after output values


  oled.setCursor(0, 34);       // Set cursor to middle-ish
  oled.print(String(mySensor.readFloatHumidity(), 1) + "%RH");          // Print humid, assuming that it is within room temp in tens


  /*
    oled.setCursor(0, 8);        // Set cursor to top-left
    oled.print();   // Print
    oled.print("Pa");          // Print

    oled.setCursor(0, 16);       // Set cursor to middle-ish
    oled.print();           // Print temp, assuming that it is within room temp in tens
    oled.print(" ft");          // Print
  */
}

void displayBME280_2() {

  oled.setCursor(0, 0);        // Set cursor to top-left
  oled.setFontType(0);         // Smallest font
  oled.print("   BME280");   // Print

  oled.setCursor(0, 8);       // Set cursor to middle-ish
  oled.setFontType(0);         // medium font
  oled.print(String(mySensor.readFloatPressure(), 2) + "Pa"); // Print pressure, assuming that it is within room temp in tens
  oled.setCursor(0, 16);       // Set cursor to middle-ish
  oled.print(String(mySensor.readFloatAltitudeFeet(), 2) + "ft");// Print altitude, assuming that it is within room temp in tens

}

void displayCCS811() {
  if (myCCS811.dataAvailable())
  {
    //If so, have the sensor read and calculate the results.
    //Get them later
    myCCS811.readAlgorithmResults();
  }

  oled.setCursor(0, 0);        // Set cursor to top-left
  oled.setFontType(0);         // Smallest font
  oled.print("   CCS811");   // Print

  oled.setCursor(0, 8);       // Set cursor to middle-ish
  oled.setFontType(1);         // medium font
  oled.print("CO2=" + String(myCCS811.getCO2())); // Print CO2, assuming that it is within room temp in tens
  oled.setCursor(0, 21);       // Set cursor to middle-ish
  oled.print("tVOC=" + String(myCCS811.getTVOC()));// Print tVOC, assuming that it is within room temp in tens

}

void drawCube()
{
  r[0] = r[0] + 10 * PI / 180.0; // Add a degree
  r[1] = r[1] + 10 * PI / 180.0; // Add a degree
  r[2] = r[2] + 10 * PI / 180.0; // Add a degree
  if (r[0] >= 360.0 * PI / 180.0) r[0] = 0;
  if (r[1] >= 360.0 * PI / 180.0) r[1] = 0;
  if (r[2] >= 360.0 * PI / 180.0) r[2] = 0;

  for (int i = 0; i < 8; i++)
  {
    float px2 = px[i];
    float py2 = cos(r[0]) * py[i] - sin(r[0]) * pz[i];
    float pz2 = sin(r[0]) * py[i] + cos(r[0]) * pz[i];

    float px3 = cos(r[1]) * px2 + sin(r[1]) * pz2;
    float py3 = py2;
    float pz3 = -sin(r[1]) * px2 + cos(r[1]) * pz2;

    float ax = cos(r[2]) * px3 - sin(r[2]) * py3;
    float ay = sin(r[2]) * px3 + cos(r[2]) * py3;
    float az = pz3 - 150;

    p2x[i] = SCREEN_WIDTH / 2 + ax * SHAPE_SIZE / az;
    p2y[i] = SCREEN_HEIGHT / 2 + ay * SHAPE_SIZE / az;
  }

  for (int i = 0; i < 3; i++)
  {
    oled.line(p2x[i], p2y[i], p2x[i + 1], p2y[i + 1]);
    oled.line(p2x[i + 4], p2y[i + 4], p2x[i + 5], p2y[i + 5]);
    oled.line(p2x[i], p2y[i], p2x[i + 4], p2y[i + 4]);
  }
  oled.line(p2x[3], p2y[3], p2x[0], p2y[0]);
  oled.line(p2x[7], p2y[7], p2x[4], p2y[4]);
  oled.line(p2x[3], p2y[3], p2x[7], p2y[7]);
}



// This function draws a line at the very bottom of the screen showing how long
// it'll be before the screen updates.
// Based on Jim's micro OLED code used in the Photon SIK KIT => [ https://github.com/sparkfun/Inventors_Kit_For_Photon_Experiments/blob/master/11-OLEDApps/Code/02-WeatherForecast/WeatherApp.ino ]
void displayProgressBar() {
  // Use lastDisplayUpdate's time, the time Arduino has been running
  // (since we do not have an RTC, Internet, or GPS), and the total time
  // per page (DISPLAY_UPDATE_RATE) to calculate what portion
  // of the display bar needs to be drawn.
  percentage = (float)(currentMillis - lastDisplayUpdate) / (float)DISPLAY_UPDATE_RATE;

  //for debugging progress bar
  //SerialUSB.println(currentMillis);
  //SerialUSB.println(lastDisplayUpdate);
  //SerialUSB.println(DISPLAY_UPDATE_RATE);
  //SerialUSB.println(percentage);
  //SerialUSB.println(oled.getLCDWidth());

  // Mutliply that value by the total lcd width to get the pixel length of our line
  progressWidth = percentage * oled.getLCDWidth();
  // the y-position of our line should be at the very bottom of the screen:
  progressY = oled.getLCDHeight() - 1;


  // First, draw a blank line to clear any old lines out:
  oled.line(0, progressY, oled.getLCDWidth(), progressY, BLACK, NORM);
  // Next, draw our line:
  oled.line(0, progressY, progressWidth, progressY);
  //oled.display(); // Update the display, this is already called after we exit this function
}