Arduino rtc time wrong. And also if it works with a different address display.

Arduino rtc time wrong The DS3231 RTC does accurate timekeeping, set alarms, output square waves and get temperature readings. _I2C_READ () method that it calls. 09. Sep 13, 2013 · I am using a RTC1307 board (I²C) to read out the curent date and time. Thats all I have connected at the moment. When I set the time on the module, it sets correctly and reports the time correctly while still attached to the USB cable. And when it gives the wrong time, its time difference continually increases. For example the time and date here right now is: Friday 27/09/2019 , Time ---> 17:53 Mar 18, 2016 · I have connected my Arduino to a Grove RTC (Realtime clock DS1307) module which is now spitting out date and time in my serial monitor. It is not often used, but it is available, even for the Arduino Uno. h> #define DHTPIN 10 #define DHTTYPE DHT11 #define CLK_PIN 8 #define DIO_PIN 9 #define BUTTON_PIN 5 # Jan 24, 2024 · Official HardwareUNO FamilyUNO R4 Minima pao3 January 24, 2024, 1:11pm 1 As you all know, Arduino UNO R4 does not have an external crystal oscillator, so when using RTC, the time lags by about 10 minutes a day. That is, there is no date/time saved in it. Nov 28, 2013 · Please can you give me a link to an article giving simple and complete information on setting time in Arduinos. The problem is that the RTC isn't confident in date and time. 1) and used the SyncArduinoClock Processing to set a time on the DS3231and while the processing worked, once I'm back on the Arduino and my sketch, I got the weird date and time values again. h> #include I am trying to make an LED clock using an DS3231 to keep track of time, but for some reason, it's not keeping time when the Arduino is turned off. This works fine; I adjust the RTC date and time to wrong values; I call a function Synchronize_RTC After synchronizing the month, day, hour, minute and second are correct, but the year is 2046 in stead of 2016. However the year is wrong. I can read the time fine, but can't seem to set the clock. Equipped with PCF8523 RTC - it can run from 3. Perfect for datalogging, clock-building, time stamping, timers and alarms, etc. I am trying to create a specific alarm for hours and minutes but using the DateTime constructor in console i read a wrong time, specifically 6:47:52 instead of 22:00:00. I have a problem with the rtc. Unfortunately, I have been experiencing a strange bug in the DS1307 real time clock that only manifests itself after a few days. 09 Jan 25, 2014 · I have a DS1307 RTC clock chip. adjust command is executed, and, depending on how you've got it programmed, it will set the 8523 date/time either to a hard-coded value (as in the code example above), or (by un-commenting the " // rtc Feb 28, 2011 · Using a RTC (real time clock) that every once in a while returns an incorrect time. For example today I noticed it was set to 2024-11-14 instead of 2024-11-12 and it has been running for about 10 days. It just writes the wrong value to the RTC. And also if it works with a different address display. Also i have tried Arduino on Atmega328P and all works fine Can someone help me? ) Feb 21, 2013 · I thought that if I set the time once in the sketch that it should keep this time until the RTC battery runs out without the arduino constantly neeing to be connected to a power source but it seems like the arduino needs to be powered to keep the time. But the time just stays the same and is not updated. The ESP8266 connects to the Internet at startup using with WiFi. I understand that there are 3 sorts of time, computer time, RTC time and Arduino time. When you need an RTC, remember to use the DS3231. Sep 16, 2020 · Hi guys. The SAMD Arduino boards (Arduino Zero, M0, MKR) have a RTC in the processor and the Arduino team made a seperate library for that: RTCZero - Arduino Reference. _I2C_WRITE () method that it calls while the now () method is receiving the incorrect value from the Wire. Follow our step-by-step guide on programming the Arduino UNO R4. 3V or 5V power & logic! Mar 2, 2022 · Hello, I have a program which I am using to count down days left until an event. What is wrong with my code? Please note the way the data is being transferred is with a 10 millisecond delay and then it expects the new Jun 26, 2019 · Hi, Here is my rtc display in the monitor screen. Its is connected via I2C, which I also have an EEPROM chip (M24M02-DR) on. Now the date and time was shown correct. They have different addresses. rtc. My pc clock is correct, bios clock is correct. During my search for answers, I have spent a long time trying to work out May 19, 2013 · I have an odd problem with a DS1302 module. May 9, 2024 · I am completing a project where I need to create a clock with 5 different time zones with 5 different Lcd displays on a arduino uno. it works Jan 17, 2018 · Serial. I am using the RTClib (JeeLabs) library to set the time using rtc. unixtime (); } During debug I printed out the unix ti&hellip; Apr 7, 2022 · Hi All, I am using Arduino Nano connected to an RTC via I2C (Adafruit pcf8523). For debugging, the board sends messages via the serial port. The good modules from Sparkfun and Adafruit do work, but cheap modules from Ebay do often not work very well. time(t); I have always played with the ds13 07 which uses a similar code to set the time: rtc. I am working at setting up a basic relay control that leverages a Scheduler, consumed on the hardware side by a Arduino Nano ESP32. println("RTC is NOT running!"); // following line sets the RTC to the date & time this sketch was compiled rtc. I don't know if the rtc is bad or something in the code? Any idea? #include <… May 17, 2023 · Hello! im doing an smart clock. This Instructable is strictly for the … Mar 23, 2016 · Previous reports of this RTC problem (1, 2, 3) attribute it to hardware issues, such as broken wires (to SCL or to battery) and overvoltage (> 3. RTC commands don't seem to be self explanatory. The above code will run. adjust(DateTime(F(__DATE__), F(__TIME__ Nov 6, 2017 · Notice that 'rtc' is a 'RTC_Millis' object in the first code, and a 'RTC_DS1307' object in the second. That chip doesn't have all those troubles. Any idea what I'm doing wrong? Sep 30, 2023 · So long as the Arduino is only reading the time from the RTC, the accuracy won't be affected. Dec 22, 2017 · it seems something in the Clock_with_RTC_LCD. I am using this DS3231: Code I am reading the time from the ds3231 with: /* Timestamp functions using a DS1307 RTC trueAn unofficial place for all things Arduino! We all learned this stuff from some kind stranger on the internet. I tried to disconnect the clock from a power sourc Aug 15, 2023 · I looked up numerous tutorials and all of the referenced libraries do not work. The problem is that the time displayed (etc. i search the solution in several posts, i think it's because the RTC module lost power. org and get the time and date data. Everything works fine, but at random times I get this. You’ve got many options – DS1302, DS1307, DS3231, DS3232, and more, but if you want precision, affordability, and reliability, the DS3231 stands out. I use the Wire. I then save this data to the RTC. But command log of what is sent to cloud is GMT 23:00!!!! Lesson 16: Real Time Clock Module (DS1302) In this lesson, you will learn how to set up and use a Real Time Clock (RTC) module with an Arduino. When I upload the program, the time get set correctly, but is never updated. 5. . I am using an ESP8266 and and RTC to store the current time when the project is powered off. I tried to upload an example code to my system and I succeed. timestamp()) and the calculated timer expiration (based on the now() function) are incorrect. I am having an issue with an incorrect offset being applied to the set time, and I am not sure where I am going wrong. 00 is not what it should be. I tried using one of the examples afterwards, to read the time back. Dec 17, 2022 · But the start time in log 1671318000= GMT : Saturday, 17th December 2022, 23. The clock is counting the seconds, but day, date and time are incorrect Feb 10, 2021 · While debugging a sketch I noticed that a DS1307 return incorrect time: To get the unix time I do: uint32_t getUnixtime () { DateTime now = rtc. adjust(). Same behave it's doing continuously. Watch my YouTube video (#5 Arduino compatible Real Time Clock modules (RTC) - DS1307 & DS3231) to find out all about them (and why you need to choose the DS3231). #include <Wire. Eventually my plan is to add a radio clock to it to pick up the May 4, 2020 · A third good option is the time of the 'c' library that is used for decades in every 'c' program. 2) on my Arduino Uno. This beginner-friendly guide includes step-by-step instructions and code to display time, and date. My wiring is: VCC - 5v GND - gnd CLK - 12 DAT - 13 RST - 11 This is my current code, which always returns Current Date / Time: 45/25/2165 45:85:85 which never changes: #include <virtuabotixRTC. I have a page where i can see the data and time. 6. My understanding is that the board will sync with IoT Cloud on start, and set the internal RTC with relevant time information configured Interface the DS3231 Real Time Clock module with the Arduino board. Before it can be useful, however, it needs to be set to the correct time. Or in my program, it gives the error Mar 5, 2021 · Hi Guys, I am having an issue that I was wondering if anyone has seen before. This is some random number that is different every time. so I give it a try if Nov 12, 2024 · I have a Portenta Machine Control and using the RTC to keep the date/time for logging. ntp. But, after starting that example code or unplugging DS1302 module (self-made) and plug it back, RTC deletes last time information and starts back from "Jan 1970, 00:00:00" What do I need to save my last time information (probably save it to Apr 9, 2021 · Heeya Guys! Today I created a project with the help of instructables site. Jan 24, 2022 · Hello, I have an Arduino uno, DS3234 RTC and 8pc of 8digit led. /* Udp NTP Client Source Sep 14, 2018 · If the Arduino/RTC is taking the RTC time (which is set as per the code provided) and converting it to seconds since 1/1/1970 without considering the time zone change between the RTC location and UTC then it is NOT Unix Time, therefore it is incorrect, as explained in the original post. It would be nice if somebody could point me in the right direction. I start with an automatic update of the RTC: RTC. Since the time (hr,min,sec) integers are declared outside the getTime function calls I thought the time would then be updated to the processor to reflect Feb 18, 2014 · I see that when using RTClib to set the time in a ds1307, the time that's used to set it is the time retrieved on compile, which causes the rtc to lag real time by about 30 seconds. I have jumped the pins a4 & a5 to the mega 20 & 21. print the Jul 8, 2022 · I have a project that is essentially a clock with some additional features. I then read the values back from the DS1307 using now() a few time a second and store Feb 26, 2022 · I installed the Time library by Michael Margolis (version 1. I have a very basic sketch to turn on/off a timer. Now that tool already works, but i have a problem on the arduino side. I've used the code at Arduino Playground - DS1302 t initially set it up, and am using the library from Electronics - Henning Karlsen as well, now. Nov 26, 2023 · Does anyone have any information on how to read and set the real time clock on the Arduino Opta PLC please? I've seen two variables: sysTimer sysTimerHiRes are these anything to do with the RTC? Mar 14, 2020 · a quick (less than one minute) google search returned this example: // Make a new time object to set the date and time. When ifirst runned the code, the time setted itself correct. This all works fine, but I wanted to get the current time using NTP and synchronise the RTC to it. For example: with the wrong time, if it currently gives 3 minutes Sep 27, 2019 · I have an arduino mega ,a lcd 16*2 and a rtc ds3231 ,but I get wrong time and date. h> // Creation of the Real Time Clock Object virtuabotixRTC myRTC(12, 13, 11); void setup() { Serial. begin(DateTime(__DATE__, __TIME__)); Now following happens: i. Uploaded the sketch and it works like a charm, but there's one problem. Jun 28, 2024 · I am installing a new ESP32 and used existing working code from another ESP32 installation for the new sketch. This is what happens: Approximately 3 to 5 days after the sketch first Apr 25, 2023 · Why does the time of my rtc module ds3231 keeps changing whenever I unplug it to arduino and plug it again Jun 26, 2024 · Learn how to use DS1307 RTC Module with Arduino. But I use CRIUS AIOP flight controller as Arduino so it have PCA9306 onboard level converter on I2C bus I tried to connect module before and after converter - same result I have tried different RTC libraries and get same result: get wrong time. For an easy repro, see the sketch I have provided in the Repro Sketch section. adjust (DateTime (__DATE__, __TIME__));" Jul 23, 2025 · The RTC module can output the hours as 165, and the minutes as 165. Maybe once every Aug 6, 2016 · An RTC is what you need and you need the correct one. 1 Hz. Discover how to get the time, date, day, month, and year on the Arduino UNO R4 with the Real-Time Clock, How to connect Arduino UNO R4's RTC to backup battery, How to update the date and time for RTC from Internet via NTP. But after a few days (almost 15-30days) the RTC DS3231 dives the wrong time (slow than the current time). h> #include <RtcDS1302. I can't find what is wrong. Dec 27, 2024 · Learn to use the DS1302 RTC module with Arduino and I2C LCD. All this talk about time drift is all very well but regardless of you blocking interrupts, an RTC is definitely what you need. i compile the sketch on 13. We provide detailed instructions, code, wiring diagrams, and a video tutorial, along with explanations for Sep 26, 2011 · Wrong return values - DS1307 RTC code question Post here about your Arduino projects, get help - for Adafruit customers! Dec 15, 2014 · Hi, I'm a beginner and I see I'm not the only one to have understanding problems with RTC clock I have a RTC module DS1307 (MR005-001. h / Time. Libraries used: DS1307RTC May 20, 2024 · Using an Arduino Uno R4 WiFi, if the RTC date is set to before 2000-01-01, it will incorrectly report the date when it is read back from the RTC. Im using an Arduino mega 2560 and XC4536, (its a data logger shield from Jaycar using RTC_DS1307 and SD card reader). I will add my code below any help or suggestions will help. Dec 14, 2014 · Which time library are you using ? I assume you use this DS1302 library : Arduino Playground - DS1302RTC The DS1307 and DS1302 are known to have many problems. These weather stations take multiple weather measurements and store it to an SD card at a sampling time of approximately 0. But It gets wrong time and date (randomly?) for example it's 2013/12/01 now. I mean there is now "correct time", but wrong time zone. I&#39;ve been looking for answer for this, but find only solu&hellip; Sep 10, 2023 · Hello. adjust (DateTime (F (DATE), F (TIME))); i get time offset of +1h 12min. Oct 29, 2017 · This is a great battery-backed real time clock (RTC) that allows your microcontroller project to keep track of time even if it is reprogrammed, or if the power is lost. We’ll cover initializing the RTC DS1302 module, displaying the current date and time on the serial monitor, and ensuring accurate timekeeping. now(). Bring us your Arduino questions or help answer something you might know! 😉 Jun 5, 2023 · In the digital world today, being able to accurately tell time is crucial for various embedded systems, IoT devices, and automation projects. I followed the on screen steps and everything. As you can see its not accurate. What ever I do, it always returns 5 (Thursday) no matter what day it is. adjust(DateTime(F(__DATE__), F(__TIME__))); } If the RTC is running, the time set line is not executed. h libraries. Unlike low-end timekeeping ICs found in basic timekeeping devices, the Arduino real time clock DS3231 features a temperature-compensated Aug 22, 2018 · When i compile the code contining rtc. See below snip how it looks in app. Everything works including the rtc alarm etc. Picking the right Real-Time Clock (RTC) module is crucial when building time-sensitive Arduino projects. Always. Apr 9, 2014 · I am experimenting currently with RTC and the time library which works quite well together except I can't get the "weekday()" function to work. // Sunday, September 22, 2013 at 01:38:50. #include <ThreeWire. I would like to understand, in plain Jan 12, 2024 · Hello! Can someone explain to me how I can change the time zone in the example code below? In my example +1 hour? There are many examples of this with an ESP32, unfortunately not for the Arduino GiGa R1 board! Thanks! Greetings from Uli /* Udp NTP Client Get the time from a Network Time Protocol (NTP) time server Demonstrates use of UDP sendPacket and ReceivePacket For more on NTP time servers Nov 12, 2023 · I am programming an M5Paper device (so basically an ESP32) and am having problems converting the year value between NTP and the built-in RTC I can successfully connect to de. I don't understand Unix commands. Today i putted it in its box. When I plug it back in, though, reading the time starts from where it was when I Aug 30, 2012 · Hi All, I've been making weather stations based on the Arduino. h / DS1307RTC. So, in order to set the RTC more accurately, I thought to put the time adjust statement, "rtc. I added in the same page a buton to set a correct data and time but it doesn't work. For fixing the time I need to upload the time resetting code. Apr 8, 2022 · I made a LED clock and I used it in my room. "The wrong time" is meaningless without knowing what time it is showing, and what time it really is. now (); return now. But if the code is writing the time to the RTC or changing other registers, that could explain the problem. The DS3231 RTC module is the most accurate and reliable real-time clock module to use in your Arduino projects. The issue is after the time is retreived upon the processor initialization it is not being updatedrunning on the new sketch. Mar 25, 2016 · I assembled a program to synchronize my RTC DS1307. I have confirmed that the adjust () method of RTC_DS1307 is sending the correct time to the WIre. h> #include <DHT. Wed 26/6/19 at 14:28. Time t(2014, 10, 6, 12, 57, 50, Time::kMonday); // Set the time and date on the chip. This beginner's guide covers setup, code, and a comparison with DS1302 to help you choose the best RTC module. Maybe move the set time function out of the if, upload the code to set the time and then comment out set time function. Edit: So to be more precise: Set Job Starting at: is 23:00 Europe/Helsinki. 2013 12:00:00. NOW the date and time was set to the date and time the sketch was compiled: RTC. adjust(DateTime(DATE, TIME). Dec 23, 2016 · Hi everyone! I just started to work with Arduino and I need to save current time on DS1302. When I Serial. But the piece of code that read the same function when Mar 15, 2025 · so i've been working with RTC module DS3231 several times, i stop the program and unconnect it with the power, when I connect it again it displays current time same as the time on my phone or laptop, but tonight i connect the power again and the module doesn't display the right time. I am working with the Arduino IDE 1. In this code block, an rtc. It happens maybe once or twice a day, but when it happens it messes up my code : ( Does anyone have any tips or tricks for this problem? Searching didn't bring up anything on this specific type of problem. h> #include <TM1637Display. year because it shows up as 1923 instead of 2023. e. ino file is redundantly trying to set the RTC Nothing in that code is setting the RTC. I don't have any logs for this change but I have seen in Dec 21, 2024 · Hello, I am using a RTC (the DS1307) and an Arduino nano ESP32. The date and time returned is completely wrong ("17:18:9 2 4 2036") What do I do wrong ?? Here is my partial code for setup () : Oct 8, 2016 · Hi, all! I connect DS1307 rtc module to arduino mega 2560. Is this the way it's supposed to be or is something wrong? Jun 2, 2017 · Hi there! I have a Tiny RTC (ds1307) module and i wrote a small tool on my computer that will send the date and time in case the battery fails. I'm using the nextion display NX8048K050_011. i don't understand where they come from. This Processing code can set the time on the RTC without using an Arduino? Aug 6, 2024 · When an un-powered (and with no battery backup) 8523 is first turned on, it is not "initialized". There were many discussions by various people, which were very helpful. Idk why but it reseted at 00:00 and now i dont know how to set it to the real time. However, after the Arduino has been running for some period (can be a few days or a week), the date and time is suddenly incorrect. Despite running an RTC, my sketches often get stuck on Compile time on reset. 3 V). Everything works fine in the software simulator but when I download the project i see always weird numbers in my variables. BUT if i restart the Arduino lets say at 14:12:23, again the date/time output starts at 13. 6-r2, a Arduino Uno and the Tiny RTC shield. Simple Guide to Setting Time on a DS3231/DS3107/DS1337 Real Time Clock With Arduino UNO: The DS3231 is a highly accurate, widely used Real Time Clock (RTC), as are its slightly less accurate counterparts, DS3107 and DS1337. The time data is all correct but there is a problem with the RTCDate. I am using a DS1307 with an Arduino Due as a RTC. 6 V supply vs 3 to 3. begin(9600); // Set Dec 29, 2011 · But there must be a reason why (presumably) the RTC has been updated with a wrong value - or could it be the Arduino clock that is wrong? Since I am hazy about borrowed Time coding lines, perhaps I have a misunderstanding there. I need to learn what to add or change to the code so I can change the time zone or be able to change the time. pool.