Comments (3)
Thanks for contacting me.
The resolution of the DS3231 time registers is up to 1 second and does not support reading the time in milliseconds.
As workaround, you can configure the SQW (Square Wave Out) pin to generate a 1024Hz, 4096Hz or 8192Hz clock with function setSquareWave(SquareWaveXXXXHz). Then you can count the pulses by a microcontroller to measure times in milliseconds.
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Thanks for reply !
I know it, but I wish that this function is included in the library.
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Capturing the SQW pin by a microcontroller should be handled by the application, because the DS3213 library has no dependencies on the microcontroller type.
Are you using an AVR / ATMega328 microcontroller (Arduino UNO/Mini etc) for example? This controller supports a 16-bit Input Capture Register on timer 1 which can be used to count SQW pulses from the RTC. A new function can be implemented by the application to convert the number of pulses to milliseconds.
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Related Issues (8)
- How to correctly tell if the battery is drained or not? HOT 1
- rtc.getAlarmFlag(Alarm2) output true recurring when it should not HOT 2
- How to ensure that correct time is uploaded to DS3231 HOT 4
- How change SDA and SCL pin? HOT 4
- aggregate 'tm dt' has incomplete type and cannot be defined struct tm dt; HOT 1
- [QUESTION] How to check if the battery is dead or not? HOT 6
- Time is delayed sometimes when power of the device is off HOT 3
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