nrf9160: How to make time() return correct time?

[Bjorn191023]

Hi,

What is the proper way to set "real time" in nRF9160 with nRF Connect SDK?

I want the function time() from the file time.h to return the correct time.

I know that I can read the correct time from the modem with +CCLK when connected to the network.

But how do I "plug" the correct time into the system so time() works as expected?

BR / Bjorn

[Håkon Alseth]

Hi Björn,

 

But how do I "plug" the correct time into the system so time() works as expected?

I think you have to write your own time() function to be able to do this, if you require the use of time() specifically.

 

What is the proper way to set "real time" in nRF9160 with nRF Connect SDK?

There's many ways of setting or fetching time. One is the +CCLK, as you mention, another is the GPS, and you could also do this over NTP as well.

Setting it on the logger seems to be possible using "log_set_timestamp_func()": https://github.com/zephyrproject-rtos/zephyr/blob/master/include/logging/log_ctrl.h#L66

However; a generic time module isn't available as far as I know.

 

Kind regards,

Håkon