Robuta

https://manpages.ubuntu.com/manpages/xenial/man3/DS1904.3.html Ubuntu Manpage: DS2415, DS1904, DS2417 - 1-Wire Time Chip, RTC (real time clock) iButton, 1-Wire... 1-Wire Time Chip, RTC (real time clock) iButton, 1-Wire Time Chip with Interrupt