RTC not working properly, need help.

Projects General Guidance
1

Sometimes, my RTC shows time like " 2165/165/165 (Saturday) 165:165:85 ". Why?

The RTC I am using is DS1307 Serial Real-Time Clock. Please help!!

2

And your code is?
And it is wired up how?

3

Is the chip even connected properly ?

Does an I2C scanner program detect the RTC at the right address ?

4

Grumpy_Mike:
And it is wired up how?

That also means the power supply. Please don't tell us you are making a portable clock powered by a 9v PP3 battery......

5

It is powered by the arduino board, and my code is

#include "RTClib.h"
void setup()
{
if (! rtc.begin())
{
Serial.println(F("Couldn't find RTC"));
while (1);
}

if (! rtc.isrunning())
{
Serial.println(F("RTC is NOT running!"));
}
rtc.adjust(DateTime(2017,8,02,16,07,00));
}

void loop()
{
DateTime now = rtc.now();
delay(150);
Serial.print(now.year(), DEC);
Serial.print('/');
Serial.print(now.month(), DEC);
Serial.print('/');
Serial.print(now.day(), DEC);
Serial.print(F(" ("));
Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
Serial.print(F(") "));
Serial.print(now.hour(), DEC);
Serial.print(':');
Serial.print(now.minute(), DEC);
Serial.print(':');
Serial.print(now.second(), DEC);
Serial.print(F(" "));

delay(3000);
}

6

I forgot to mention the global variables I am using

char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

RTC_DS1307 rtc;

7

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8

Grumpy_Mike:
And it is wired up how?

Your answers have not addressed this question. Without this we haven't got a clue where you are making your mistake.

9

shashsp47:
Sometimes

What about other times?

Is there anything different between "sometimes" and "other times"?- same / different power, code, connections etc? Kepner and Tregoe would tell us there has to be something different.

10

shashsp47:
It is powered by the arduino board

That is being rather opaque, but the output you quote would suggest not too well.