Arduino Project: Real time clock (RTC) and temperature monitor using the DS3231 module.

Arduino Project: Real time clock (RTC) and temperature monitor using the DS3231 module.

In this video we build a Real Time Clock using the DS3231 chip.

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[RonnieTucker]

Fantastic tutorial on the D3231 RTC. This is the only code and wiring that I could get working. Thank you SO much! 

[robertrobert]

thanks for posting this. Just to say to other users that if you get an error at line 135 then change "boolean flags [5]' to 'byte flags[5]' at lines 135 and 146 then it works (found on Arduino forum)

[BRUCE]

I wrote a small function to help create the time string:

String setTime(String year, String mon, String day, String dW, String hour, String minute, String sec){

String dT =

if(dT.length() > 16 || dT.length() < 16){
return ("Incorrect Format!");
}else{
return dT;
}

}

So when calling parse_cmd its a lot easier to the eyes

parse_cmd(setTime("2016", "02", "08", "1", "21", "51", "00"), 16);

[angelm.]

Dear friends,

I recently found your video about RTC modules, I followed the instructions and the module worked fine.
But I modified the original code, in order that the display also shows the day of the week, for this I added the printDay function who works in the same way that the printMonth function:

void printDay(int wday)
{
  switch(wday)
  {
    case 1: lcd.print(" Mon ");break;
    case 2: lcd.print(" Tue ");break;
    case 3: lcd.print(" Wed ");break;
    case 4: lcd.print(" Thu ");break;
    case 5: lcd.print(" Fri ");break;
    case 6: lcd.print(" Sat ");break;
    case 7: lcd.print(" Sun ");break;
    default: lcd.print(" Error ");break;
  } 
}

 The problem is that the value of the  wday variable is always 2.
I made a test setting different values for the wday in parse_cmd function, but the display always shows Tuesday.
I tried to find the bug in the code, but I'm just a beginner. if you could help I would be very grateful.
Thanks and best regards,

Angel M. Muñoz
Madrid, Spain

[dotgr]

Συγχαρητήρια για την τρομερή δουλειά σου φίλε

[valakatz]

thank you for video well done! i have only one question, I am using arduino uno r3 how will you connect the time module? Thank you for your reply.

[xXOMwtfFGXx]

Thanks for this easy instruction! Its very easy to rewrite your code if you have a I2C display.

[karimismail]

Nick, as always great presentation. I got all the necessary parts, will finalize this project tomorrow, God willing. Will post follow up. Thanks again.... Your code worked for my df mp3 Sketch in the other Tutorial.

[bobdurk]

Very nice version with code I can follow and utilize . Thanks for sharing ! I have been looking for a reliable RTC and this looks like it will do the trick .
Bob

[psicaliph]

Greetings sir. Thanks for your coding, I was able to make use of it to my final year project. However, there's one thing I need to ask you with, since I'm really not good on coding.

It's about how to insert alarm clock coding to your coding. There's few more codings out there, but I feel like using yours instead, since you use almost similar components like mine.

By the way, I'm using Arduino Mega, RTC DS3231, LCD 16x2 with I2C, and a buzzer.

Thank you in advance. Your attention is appreciated.

[fabiojesus]

Hy.
i have 2 questions:
1.Can i use DS3231 module ic2 communication with arduino nano?
2. in my project, i just need get time and get hour. There are other module with fewer resources?
Thank you for share with us! nice video =)

[edwinkhaled]

Great job and presentation. How do i interface a keypad for setting incubating periods that will be displayed on the LCD. And a reminder with GPS

[thanhngo]

Thank you bro. Regarding temperature issue. i wonder how is it working? using ADC or digital sensor inside. i mean what kind of signal. I am reading datasheet now and see :"Temperature conversion current". If i am wright, this one have 2 digital ICs, one is timer and one is temperature and communicated by I2C. Thanks

[Sergio-leuf]

Muy bueno el tutorial, me gusto mucho.perfectamente explicado
Tengo una duda
Se podría controlar un relé con este RTC para hacer ciclos de ON/OFF cada 12h(O cada X tiempo)?
tengo unos conocimientos muy muy básicos de programación y buscando no encontré muchos codigos que pueda utilizar
Muchas gracias de antemano

[fabianpucciarelli]

I RECIBE AN ERROR: rtc:19:17: error: 'DS3231_INTCN' was not declared in this scope
ANY SUGGESTION? THANKS

[cristianojanuario]

Hi, nice video, but I had some problem, could you help-me? I have an error "DS3231_INTCN' was not declared in this scope", how to solve this?
Thanks.

[davidederosi]

Hello, can you store and recall a temperature with the date and time of the mesurement or you need a log with sd card? Thanx

[nickx]

Code worked perfectly. Thanks a lot! Can the buttons on the shield be incorporated into the function of this device? If so what lines of code would I add?

[user]

Thanks for the video. I was wondering.... I wrote a sketch that uses a waterproof thermistor to activate a relay while showing the temp on the I2C 16x2. How hard would it be to adopt this code to do that and activate another relay based on time (like a lamp timer)?

[LUCKY]

you always done good job
could you please make a tutorial on clock without RTC and that can be set manually by buttons waiting for valuable response
Thanks for the efforts