How to get timestamp with nrf52840 using RTC

[Revati]

Hi all,

In my project i want to get the timestamp with help of RTC. but when i am printing timestamp it is giving timestamp after power on of the device but i want epoch time for current date and time. how i can get that?

Thanks,

Revati

[Revati]

My application is not connecting to Bluetooth it is device which is used in landfill so can you suggest any other better option 

[Revati]

If we will connect Bluetooth to device then i will be able to get current reference time

[Einar Thorsrud]

If you connect with a Bluetooth device with a current time service server (like a mobile phone), then yes. But you also have the problem that if the nRF is reset you will need to set the time again. If you need to keep track of time over a long time and also if there are (intentional or unintentional) resets, you may be better of considering adding an external real time clock IC.