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sleemanj / DS3231_Simple

An Arduino Library for EASY communication with DS3231 I2C RTC Clock and Atmel AT24C32 I2C EEPROM commonly found on the same board. Implements setting, getting the time/date, setting, checking and clearing alarms, and dead-easy circular-buffered logging of data with timestamp.
MIT License
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Not erasing logs after reading them #2

Closed Cyberteen closed 7 years ago

Cyberteen commented 7 years ago

Hi, Thanks for this great library.

Is it possible to possible to preserve the logs after reading them using readLog function? Maybe disable the makeEEPROMSpace function in the readLog() to do that.

Thanks

sleemanj commented 7 years ago

Yes you could as you say remove the call to makeEEPROMSpace this will prevent the just-read log entry from being killed.

To read that log entry again you would then have to read all the other log entries one by one to "walk along the log" as it were until you get back to that one (or implement some sort of rewind/seek function).

You would want your log data to include some sort of identifier so that you knew, when reading, that you had got to the start again, otherwise you could be reading logs in a loop forever :-)

Note also that the nature of a circular buffer is that old log entries will be over-written by new log entries when the buffer is full.

geologic commented 7 years ago

I also need to preserve logs after readLog(). I commented makeEEPROMSpace line but everytime i do a readLog(), i only see the logs between readLog() calls. What else do i need to modify to everytime i call readLog() i get all logs from the beginning?