Questions tagged [ds3231-alarms]

Question 1

I have ds3231 which i want to use to keep track of time even when the in my ase esp32 is without electricity. I however read some difference stuff regarding using the vcc and battery on he same time. ...

Question 2

I am a PHP web programmer, but I am a beginner studying Arduino. I would like to inquire about a problem with the following function that I am creating while looking for various references. (This ...

Question 3

I try to change time on windows to test my programing condition but RTC usually keep old time when i change time on windows and re-upload the code . I'm also removing the battery and cut the power it ...

Question 4

I want to convert hour to seconds but unsigned long is overflowing, here's the code: #include <Wire.h> #include <DS3231.h> RTClib myRTC; unsigned long seconds; char timestr[9]; void ...

Question 5

Question 6

I am trying to make 2 alarms for 2 different times using 2 LED's which should turn on when the time corresponds to the set time and then if a pushbutton is pressed, the LED should turn off. For the ...

Question 7

Heeya Guys! Today I created a project with the help of instructables site. I followed the on screen steps and everything. Uploaded the sketch and it works like a charm, but there's one problem. ...

Question 8

my use case is that I am building a distance sensor using Arduino Uno. The idea is when the distance is between a threshold, an SMS is sent from the device. I am using DS3231, SIM800L, and HCSR04 for ...

Question 9

I need to send a pulse to an Arduino at every one hour. I don't need day, month, year etc. I just want a pulse from DS3231 at every 1 hour through the square wave pin. https://github.com/...

Question 10

I am quite noobish with using the interrupts on Arduino and I am facing a strange problem. I am using an Arduino Pro Mini, a light sensor and an RTC module(DS3231) which has set 2 alarms, one at ...

Question 11

I have been using ds3231 rtc module for keep tracking and make alarm along with backup battery. when I used it for first time it worked fine. but now it doesn't keep track my time when the power lose ...

Question 12

This is not a code error I have been using DS3231 RTC module with battery. When I bought this module It worked perfectly now when I get it to use, The time is running perfectly. when I set the current ...

Question 13

I have a ds3231 and Arduino UNO and I need to get an interrupt from ds3231 once a week for example every Fridays. I've searched a lot in the internet and forums but did not find any library or code ...

Question 14

I am using ESP8266 NodeMCU with MAX7219 and a DS3231 teal time clock. I want to display the time and some text. The display is made of 4 FC16 modules which are made of 4 8x8 MAX7219 led matrix modules ...

Question 15

EDIT2: Well, this is the "new" code and it just displays random dots on the matrices: #include "RTClib.h" #include <MD_Parola.h> #include <MD_MAX72xx.h> #include <SPI.h> // Define ...

Stack Exchange Network

Questions tagged [ds3231-alarms]

Use DS3231 with battery and vcc at the same time

LED button alarm with DS3231 RTC problems

RTC DS3231 always remember the old time

Why the unsigned long is overflowing?

DS3231 is unable to keep record of time

Turning off a LED

DS3231 Clock project shows right date but wrong day

Arduino unable to wake up using interrupt after sending SMS

Problem understanding how to program DS3231 RTC

Arduino with interrupts enters in a locking state

Set control register to low in ds3231 rtc

Real Time clock module error-DS3231

ds3231 rtc module weekly alarm

ESP8266 NODEMCU V3 web server with MAX7219 and DS3231 RTC

Parola library and DS3231 clock

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