Hi,

I am using beagle Bone Black with debian image. Could any please suggest 
how to automatically set the system time (on every reboot) by external RTC 
module DS3231. Once internet is connected, i want to update both system 
time and DS3231 with the network time.

I am controlling a relay based on system time, my application should take 
DS3231 time and run perfectly even if internet is disconnected and not 
available for so many days.

Few things i have tried, the following content has been kept in the script 
and running @reboot script in crontab. The system time has been changed if 
we enter this command manually after boot but not in auto start script. 
Please advice.

*echo ds3231 0x68 > /sys/class/i2c-adapter/i2c-1/new_device*

*hwclock -r -f /dev/rtc1*

Best regards,

NK

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