In ESP Series this is unique project to make own clock using ESP32 and External RTC module and display your clock in OLED display.
Components and software Required –
- Arduino IDE in operating system.
- RTC Module
- OLED display
- ESP32
- PCB board / Breadboard
- Jumpers Wire
Install Arduino IDE follow this blog on how to install ESP in Arduino IDE—
https://elconics.com/getting-started-withesp32/
Install Library in Arduino IDE
Go to this get hub link to download zip file of RTC library– https://github.com/adafruit/RTClib
Click on sketch >> include libraries >> add Zip library
Select your zip file named RTClib-master.zip >> click on open
Now you get this notification in bottom of Arduino IDE
Follow this same step and and Download these library >> and install it.
click on this link to download –
Adafruit GFX– –https://github.com/adafruit/Adafruit-GFX-Library
SPI – https://github.com/PaulStoffregen/SPI
Adafruit SSD1306 –https://github.com/adafruit/Adafruit_SSD1306
Connect ESP to RTC module
Add this Code to view in results in Serial monitor
#include <SPI.h>
#include <Wire.h>
#include "RTClib.h"
RTC_DS3231 rtc;
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
void setup()
{
Serial.begin(9600);
if (! rtc.begin()) {
Serial.println("Couldn't find RTC");
while (1);
}
rtc.adjust(DateTime(__DATE__, __TIME__));
//*******************************Important Note*******************
// You have to adjust this time only once afterwards you have to comment this line otherwise
// On every boot time will again reset and will start from the last reseted time
}
void loop()
{
DateTime now = rtc.now();
Serial.print(now.hour() , DEC);
Serial.print(":");
Serial.print(now.minute() , DEC);
Serial.print(":");
Serial.print(now.second() , DEC);
Serial.print(" ");
Serial.print(now.day(), DEC);
Serial.print(":");
Serial.print(now.month() , DEC);
Serial.print(":");
Serial.print(now.year() , DEC);
Serial.print(" ");
Serial.println(daysOfTheWeek[now.dayOfTheWeek()]);
delay(1000);
}
To See Results on OLED SPI
Connect OLED in this form with RTC module shown previously
Follow this Code
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include "RTClib.h"
RTC_DS3231 rtc;
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
#define OLED_MOSI 23
#define OLED_CLK 18
#define OLED_DC 4
#define OLED_CS 5
#define OLED_RESET 2
Adafruit_SSD1306 display(OLED_MOSI, OLED_CLK, OLED_DC, OLED_RESET, OLED_CS);
void setup()
{
Serial.begin(9600);
if (! rtc.begin()) {
Serial.println("Couldn't find RTC");
while (1);
}
rtc.adjust(DateTime(__DATE__, __TIME__));
display.begin(SSD1306_SWITCHCAPVCC);
display.clearDisplay();
display.setTextColor(WHITE);
//display.startscrollright(0x00, 0x0F);
display.setTextSize(2);
display.setCursor(0,5);
display.print(" Clock ");
display.display();
delay(3000);
}
void loop()
{
DateTime now = rtc.now();
display.clearDisplay();
display.setTextSize(2);
display.setCursor(75,0);
display.println(now.second(), DEC);
display.setTextSize(2);
display.setCursor(25,0);
display.println(":");
display.setTextSize(2);
display.setCursor(65,0);
display.println(":");
display.setTextSize(2);
display.setCursor(40,0);
display.println(now.minute(), DEC);
display.setTextSize(2);
display.setCursor(0,0);
display.println(now.hour(), DEC);
display.setTextSize(1);
display.setCursor(0,15);
display.println(now.day(), DEC);
display.print(daysOfTheWeek[now.dayOfTheWeek()]);
display.setTextSize(1);
display.setCursor(25,15);
display.println("-");
display.setTextSize(1);
display.setCursor(40,15);
display.println(now.month(), DEC);
display.setTextSize(1);
display.setCursor(55,15);
display.println("-");
display.setTextSize(1);
display.setCursor(70,15);
display.println(now.year(), DEC);
display.display();
}
