NRF52840 date time example

[Jay_Lin]

So, I am working on nrf52840 with nrf connect sdk and I want to get date and time in my project, I found a library in nrf connect sdk ->libraries->other libraries->date-time, I tried to add the configuration in my prj.conf, but an error occur.

[nRF5xFanboy]

Hello Jay_lin

The error tells you what to do -> please add a path to find your board definition.

What toolchain are you using?
segger embedded studio or visualCode?

When you are using SES then you can adapt the file: cmakelist.txt to add the missing board root path

set(BOARD_ROOT $ENV{EXAMPLE_BASE}})    

where:
     EXAMPLE_BASE   can be  c:\cm\ncs\projects\my_project\boards

When you are using visualCode then you can manually add a board configuration to build with.

Perhaps the next website helps:
developer.nordicsemi.com/.../build-flash-debug.html

[Jay_Lin]

Hi nRF5xFanboy I am using vscode, I have a question when I delete the config relate to Time it build and work, but when I add config relate to Time it shows error is it still the problem about board configuration? 

[nRF5xFanboy]

Which config?
Can you provide a configuration key+value you talking about in the proj.conf

The error at the bottom tells you  the missing dependencies  
what modem do you use?

[Jay_Lin]

I edit the post the config I add below #TIme is causing the problem when I delete them It build. what is modem? sorry for noob question 

[nRF5xFanboy]

Hello Jay_Lin,

* don't be sorry foor noob questions.* 

What hardware are you using ?

If this is only a nordic development kit nrf52840DK ?  (like the picture here)

If yes, then you can never have date&time  because this board is unable to synchronize with a possible time server present on the internet (or another time source like a cellular network)
it needs a modem to establish connection to get the real world date & time

An alternative solution is to connect a gps receiver and obtain time from there.

[Jay_Lin]

Yes I am using nrf52840dk, thanks for the solution I will do some study 

[nRF5xFanboy]

Hello Jay_Lin,

If there is no additional hardware involved then you can not have real world date&time
With the nrf52840dk you can only have "systems tics counter"

You need a modem   + sim-card
For example: 

https://www.conrad.nl/nl/p/sos-electronic-arduino-mc60gsm-gps-1925472.html?utm_source=google&utm_medium=surfaces&utm_campaign=shopping-feed&utm_content=free-google-shopping-clicks&utm_term=1925472&adcampaign=gshop&tid=14579472676_122103879770_pla-304375124321_pla-1925472&gclid=CjwKCAjwo_KXBhAaEiwA2RZ8hL9boviQGXVCdF7HGNy9fEt0hANdcVzmH7xv0gVGdmEnsR13i1ODPRoC29EQAvD_BwE

Can you please mark my answer as solution, thanks! ;-)