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That's very interesting, but it's not clear how my RTC can awake arduino, because in my program arduino just read permanently the time send by the RTC...

Dadep
– Dadep

2017-07-19 14:09:45 +00:00
Commented Jul 19, 2017 at 14:09
1

Some (not all) RTCs have an interrupt timer. Depending on the module it is either INT or SQW. You can set a time and go to sleep then RTC will wake the arduino that is configured to wake up on that interrupt. Then you can read the data, set a new timer and go sleeping again. See here and here

Kwasmich
– Kwasmich

2017-07-19 14:21:09 +00:00
Commented Jul 19, 2017 at 14:21
Thanks, it's seems to be what I'm looking for, do you know any library that allow easily to make this configuration ? I read a lot about but didn't understand how to set the RTC DS3231, to send message four time a day.

Dadep
– Dadep

2017-07-19 18:39:51 +00:00
Commented Jul 19, 2017 at 18:39

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