Check datetime of files?



  • I want to be able to reboot the lopy based on seeing a file version in the file directory? How do i do this?



  • You can get a list of files with uos.listdir(<dir>). If you tell the version by the modification data, uos.stat()[7] tells you the file modification time, given that the clock was set appropriately, and machine.reset() can be called to reset the device.
    If you do not have RTC supplied by a battery, you can set the time via ntp by:

    from machine import RTC
    rtc=RTC()
    rtc.ntp_sync("pool.ntp.org")
    

    Then, the file modification times are valid.
    If you use another mechanism as version indicator, like the name of a file or the content of a file, you have to define and implement it yourself.


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