Hi @imekon !
We had no time to integrate the RTC chip at the software level. Although it’s easy to configure, there are some details than must be considered and we are still thinking about it.
Anyway, if you want to check the RV3028, you could configure it by hand by simply following these instructions:
This “uputronics” board use the same RTC chip than the V5 main board, so the instructions works perfectly OK. Of course, don’t forget to put the CR32 battery in its holder 
All the best,