eDOT: Precision Arduino Clock & Weather Station with Built‑In IR Remote

Necessary tools and machines

Apps and online services

Arduino IDE

About this project

eDOT

is an Arduino based precision clock and weather station with built in IR remote receiver and automatic brightness adjustment.

The device has been designed to be easily expanded with additional hardware like WIFI module or other.

Thanks to its six 8x8 dot matrix LED display can be used to show many type of information coming either from internal sensor, custom scrolling messages or wireless from the internet (RSS, etc)

It has a very low power consumption, a simple and elegant design that combines glass front face and 3D printed parts for the body.

The project is currently under development and I will be updated.

Download 3D parts on Thingiverse

And see also my Youtube channel for more projects:

https://www.youtube.com/channel/UCbIomyFKzBiLHqEb2xv9GHQ

B.O.M.

• N.1 x 3D printed left half body

• N.1 x 3D printed right half body

• N.1 x 3D printed left cover

• N.1 x 3D printed right cover

• N.2 x 3D printed foot

• N.12 x 3D printed display support

• N.1 x Burnished glass 240x75x5 (mm)

• N.1 x Orange filter

• N.6 x Adafruit 8x8 dot matrix display type Luckylight M1603095 (White)

• N.6 x MAX7219 controller board

• N.1 x USB breakout board

• N.1 x BME280 breakout board

• N.1 x DS3231 chip

• N.1 x IR receiver type IRM-56384

• N.1 x photoresistor type LDR-07

• N.1 x ATMEGA328PU (Arduino custom board)

• N.6 x OMRON 12mm tactile button

eDOTcore PCB

Finally I've got the very first prototypes of the control board for eDOT.

GO TO eDOTcore project page

Code

• eDOT: Versatile precision weather station and clock

eDOT: Versatile precision weather station and clockArduino

// eDOT: Versatile precision weather station and clock

//HISTORY
// 11/12/2105 Added measurement calibration coefficients
// 09/06/2016 Added automatic display brightness
// 09/06/2016 Added task scheduler
// 07/08/2016 Added eDOT splashscreen

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Max72xxPanel.h>
#include <Average.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
#include "RTClib.h"
#include <EasyScheduler.h>

Adafruit_BME280 bme; // I2C
RTC_DS3231 rtc;

int pinCS = 10; // Attach CS to this pin, DIN to MOSI and CLK to SCK (cf http://arduino.cc/en/Reference/SPI )
int numberOfHorizontalDisplays = 7;
int numberOfVerticalDisplays = 1;

Max72xxPanel matrix = Max72xxPanel(pinCS, numberOfHorizontalDisplays, numberOfVerticalDisplays);

#define TEMPERATURE 0
#define HUMIDITY    1
#define PRESSURE    2
#define TIME        3
#define DAY         4
#define DATE        5


float temp;
float tempavg;
char tempf[8];
float hum;
float humavg;
char humf[8];
float press;
float pressavg;
char pressf[8];
int screen = 0;                                                 // initial screen
long previousLEDMillis = 0;                                     // for LED display update
long LEDInterval = 5000;                                        // delay between screens  
int screenMax = 5;                                              // maximum number of screen
bool screenChanged = true;                                     // screen status
float lightsens;
float screenBrt = 0;
float lightsensavg;



Average<float> avetemp(60);                                     //Average for temperature (80 samples)
Average<float> avehum(60);                                      //Average for humidity (80 samples)
Average<float> avepress(60);                                    //Average for pressure (80 samples)
Average<float> avelightsens(40);                                //Average for pressure (80 samples)


//Calibration coefficients
float temp_o = -1.70;
float temp_s = 1.0;
float temp_lin;
float hum_o = 2.45;
float hum_s = 1.0;
float hum_lin;
float press_o = 0.0;
float press_s = 1.0;
float press_lin;

//Brightness sensor correction
float brt_o = -4;
float brt_s = 1.35;

Schedular Task1;
Schedular Task2;

void setup() {
  Task1.start();
  Task2.start();
 
  Wire.begin();  // Start I2C
  bme.begin(0x76);
  matrix.setIntensity(screenBrt); // Use a value between 0 and 15 for brightness

// Adjust to your own needs
//  matrix.setPosition(0, 0, 0); // The first display is at <0, 0>
//  matrix.setPosition(1, 1, 0); // The second display is at <1, 0>

  matrix.setRotation(0, 1);                                      // Adjust display orientation
  matrix.setRotation(1, 1);                                      // Adjust display orientation
  matrix.setRotation(2, 1);                                      // Adjust display orientation
  matrix.setRotation(3, 1);                                      // Adjust display orientation
  matrix.setRotation(4, 1);                                      // Adjust display orientation
  matrix.setRotation(5, 1);                                      // Adjust display orientation
  matrix.setRotation(6, 1);                                      // Adjust display orientation
  matrix.setRotation(7, 1);                                      // Adjust display orientation
/*
 matrix.setRotation(8, 1);                                       // Adjust display orientation
 matrix.setRotation(9, 1);                                       // Adjust display orientation
*/ 
  rtc.begin();
//  matrix.setRotation(3, 2);    // The same hold for the last display

//  rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
// rtc.adjust(DateTime(2016, 02, 28, 16, 44, 0));

  

//Serial.begin(9600);

//eDOT SPLASHSCREEN
 matrix.fillScreen(0);
  matrix.write();
  matrix.setCursor(12,0);
  matrix.print("eDOT");

  for(screenBrt = 0; screenBrt <=15; screenBrt++){
delay(25); 
 
  matrix.setIntensity(screenBrt); // Use a value between 0 and 15 for brightness  
  matrix.write(); 
}
delay(250);

  for(screenBrt = 15; screenBrt >= 0; screenBrt--){
delay(50); 
 
  matrix.setIntensity(screenBrt); // Use a value between 0 and 15 for brightness  
  matrix.write(); 
}
delay(500);
  matrix.fillScreen(0);
  matrix.write();
delay(1000);

}

void loop() {
    Task1.check(acq1,500);
    Task2.check(acq2,20);
}

  
  void acq1(){
// DATA ACQUISITION AND AVERAGING
  
  temp = bme.readTemperature();
  avetemp.push(temp);
  tempavg = avetemp.mean();
  hum = bme.readHumidity();
  avehum.push(hum);
  humavg = avehum.mean();
  press = bme.readPressure();
  avepress.push(press);
  pressavg = avepress.mean();
  
  DateTime now = rtc.now();
  outSec = now.second();
  outMin = now.minute();
  outHour = now.hour();
  outday = now.day();
  outmonth = now.month();
  outyear = now.year() - 2000;
  dow = now.dayOfTheWeek(); 
 } 
  

  
  void acq2(){
  lightsens = analogRead(A3);
  avelightsens.push(lightsens);
  lightsensavg = avelightsens.mean();  
  screenBrt = constrain(((lightsensavg /1023 * 15 ) * brt_s + brt_o), 0 , 15);
  matrix.setIntensity(screenBrt); 
     
// DATA LINEARISATION
  temp_lin = tempavg * temp_s + temp_o;
  hum_lin = humavg * hum_s + hum_o;
  press_lin = pressavg * press_s + press_o;

  unsigned long currentLEDMillis = millis();

 //Serial.println(screenBrt);

  if(currentLEDMillis - previousLEDMillis > LEDInterval)          // save the last time you changed the display 
  {
    previousLEDMillis = currentLEDMillis; 
    screen++;
    if (screen > screenMax) screen = 0;                           // reset to initial screen once cycle is completed
    screenChanged = true; 
  }

//  if (screenChanged)                                            // update measurement upon screen change
//  {
//    screenChanged = false;                                      // reset for next iteration
switch(screen){

case TEMPERATURE:
  dtostrf(temp_lin,4, 2, tempf);                                   // format to five digits with two decimals
  matrix.setCursor(6,0);
  matrix.setTextSize(1);
  matrix.setTextColor(255);
  matrix.print(tempf);                                            // print current temperature
  matrix.drawRect(37,0,2,2,255);                                  // draw grade symbol              
  matrix.setCursor(40,0);
  matrix.print("C");
  matrix.write();                                                 // write current data to display
  matrix.fillScreen(0);                                           // clear display
break;


case HUMIDITY:
  dtostrf(hum_lin,4, 2, humf);                                     // format to five digits with two decimals
  matrix.setCursor(6,0);
  matrix.setTextSize(1);
  matrix.setTextColor(255);
  matrix.print(humf);                                             // print current temperature
  matrix.setCursor(37,0);
  matrix.print("%");
  matrix.write();                                                 // write current data to display
  matrix.fillScreen(0);                                           // clear display
break;

case PRESSURE:
  dtostrf(press_lin,6, 0, pressf);                                 // format to five digits with two decimals
  matrix.setCursor(0,0);
  matrix.setTextSize(1);
  matrix.setTextColor(255);
  matrix.print(pressf);                                           // print current temperature
  matrix.setCursor(37,0);
  matrix.print("Pa");
  matrix.write();                                                 // write current data to display
  matrix.fillScreen(0);                                           // clear display
break;

case TIME:
//  dtostrf(press_lin,6, 0, pressf);                                 // format to five digits with two decimals  
  matrix.setCursor(0,0);
  matrix.setTextSize(1);
  matrix.setTextColor(255);
   if (outHour < 10){
   matrix.print("0");        
  }  
  matrix.print(outHour,0);                                           // print current hours
  matrix.print(":");
   if (outMin < 10){
   matrix.print("0");        
  }
  matrix.print(outMin,0);                                           // print current minutes
  matrix.print(":");
   if (outSec < 10){
   matrix.print("0");        
  }
  matrix.print(outSec,0);                                           // print current seconds
  matrix.write();                                                 // write current data to display
  matrix.fillScreen(0);                                           // clear display
break;

case DATE:
//  dtostrf(press_lin,6, 0, pressf);                                 // format to five digits with two decimals  
  matrix.setCursor(0,0);
  matrix.setTextSize(1);
  matrix.setTextColor(255);
   if (outday < 10){
   matrix.print("0");        
  }  
  matrix.print(outday,0);                                           // print current hours
  matrix.print("/");
     if (outmonth < 10){
   matrix.print("0");        
  }  
  matrix.print(outmonth,0);                                           // print current minutes
  matrix.print("/");
  matrix.print(outyear,0);                                           // print current seconds
  matrix.write();                                                 // write current data to display
  matrix.fillScreen(0);                                           // clear display
break;

case DAY:
//  dtostrf(press_lin,6, 0, pressf);                                 // format to five digits with two decimals  
  matrix.setCursor(15,0);
  matrix.setTextSize(1);
  matrix.setTextColor(255);
  matrix.print(daysOfTheWeek[dow]);
  matrix.write();                                                 // write current data to display
  matrix.fillScreen(0);                                           // clear display
break;

 }
 }