Hello, I want to conform about RTC DS3231 second. It's working and I was able to set the time, but the serial printed time is always incorrect. Specifically the seconds are jumping like
RTC:0:18:36
RTC:0:18:38
RTC:0:18:41
RTC:0:18:42
RTC:0:18:44
RTC:0:18:47
RTC:0:18:49
RTC:0:18:50
RTC:0:18:53
RTC:0:18:55
I am reading RTC in main loop using a flag set at every 1 sec which sets in timer1 callback function. The same issue was faced earlier. Link given below RTC ds3231 second-issue
Your topic was MOVED to its current forum category which is more appropriate than the original as it has nothing to do with Installation and Troubleshooting of the IDE
Start by writing the simplest possible sketch to read and print just the current second from the RTC
Does it work correctly ?
On this forum? Then, why are you starting a new thread?
Try printing the value of millis() with each seconds value (on the same line). Post the results here.
Also, you didn't post any code.
Serial.print() is too slow inside an interrupt service routine.
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