I'm using a DS1307 RTC (https://www.adafruit.com/product/3296) and an Arduino mega microcontroller trying to simply set and read the time of the RTC. However, whenever I try to output anything to the Serial Monitor, I get stuff like this:

The code and the wiring is fairly straightforward which is why I'm confused. I'm just directly attaching the Vcc, GRND, SCL and SDA pins of the clock to the Arduino and using a slightly modified version of the example code as a part of the RTC library Adafruit supplied.

#include <Wire.h>#include "RTClib.h"RTC_DS1307 rtc;void setup () {  while (!Serial); // for Leonardo/Micro/Zero  Serial.begin(57600);  rtc.begin();  rtc.adjust(DateTime(2017, 11, 17, 20, 33, 0));}void loop () {    DateTime now = rtc.now();    Serial.print(now.year(), DEC);    Serial.print('/');    Serial.print(now.month(), DEC);    Serial.print('/');    Serial.print(now.day(), DEC);    Serial.print(' ');    Serial.print(now.hour(), DEC);    Serial.print(':');    Serial.print(now.minute(), DEC);    Serial.print(':');    Serial.print(now.second(), DEC);    Serial.println();    Serial.println();    delay(1000);}

So I know I'm doing something wrong but I'm not sure what. Any help would be hugely appreciated.

• Can you post a schematic of how you have the DS1307 wired?

  ThreePhaseEel

  – ThreePhaseEel

  2017-11-18 00:50:57 +00:00

  CommentedNov 18, 2017 at 0:50
• Looks like a baud rate issue. Check your clock speed and settings.

  Trevor

  – Trevor

  2017-11-18 01:54:55 +00:00

  CommentedNov 18, 2017 at 1:54
• Set the serial monitor to 57600 and check.

  ammar.cma

  – ammar.cma

  2017-11-18 02:38:11 +00:00

  CommentedNov 18, 2017 at 2:38
• @ammar.cma In the code above you can see that I did set the serial monitor to 57600

  chrispy

  – chrispy

  2017-11-19 00:24:55 +00:00

  CommentedNov 19, 2017 at 0:24
• @Trevor What should I be changing it too exactly?

  chrispy

  – chrispy

  2017-11-19 00:25:13 +00:00

  CommentedNov 19, 2017 at 0:25

1 Answer1