Jetson/RTC

Basic strategy
Simply follow Santyago's great How-To posted on the forum.

https://devtalk.nvidia.com/default/topic/769727/embedded-systems/-howto-battery-backup-rtc/


 * Use Santyago's Grinch Custom Kernel 19.3.4 or above
 * Use an RTC module (Dallas DS3231)
 * Connect the RTC module on Jetson TK1's I2C bus

Custom Kernel
Install Santyago's Grinch Custom Kernel.

https://devtalk.nvidia.com/default/topic/766303/embedded-systems/-customkernel-the-grinch-19-3-7-for-jetson-tk1/