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JChristensen / DS3232RTC

Arduino Library for Maxim Integrated DS3232 and DS3231 Real-Time Clocks
GNU General Public License v3.0
392 stars 135 forks source link

Allarm every 2 hours #84

Closed gpalmia closed 3 years ago

gpalmia commented 3 years ago

Hello, Can anyone suggest me how to create alarm every 2 hours with ds3231? Thanks

JChristensen commented 3 years ago

https://github.com/JChristensen/DS3232RTC/blob/master/alarm-primer.md

sanastasiou89 commented 3 years ago

Hi,

I have a question in regards to the above link you have posted.

As per point 3 on the post, when a flag is set, it remains like this until we clear the flag. As per my understanding, this means that INT pin (we assume that we disable SQW through RTC.squareWave(SQWAVE_NONE)) remains active low until we clear the flag. Correct? So we can control the duration of an active low state through arduino delay function.

Thanks in advance.

JChristensen commented 3 years ago

You are correct, but the RTC controls the state of its INT pin, not the delay() function.

sanastasiou89 commented 3 years ago

Thank you very much for your answer. So, how do i implement through code for example to keep the INT pin in active low state for 10 seconds and then set it high again (which means deactivation of alarm flag)?

JChristensen commented 3 years ago

I try to limit issues here to actual problems with the library. If you need help with your code, please use the Arduino forum or one of several others that are available. Study the examples and the alarm primer that come with this library. Study the DS3231 datasheet. Sorry about that and good luck with your project.