Trying to run the RTC sample code from ncs/zephyr/samples/drivers with the ns board.

RE: Trying to run the RTC sample code from ncs/zephyr/samples/drivers with the ns board.

Hakon — Fri, 06 Sep 2019 11:35:47 GMT

My bad, I confused the +cclk command with the %xtime command, which should give you the network time.

RE: Trying to run the RTC sample code from ncs/zephyr/samples/drivers with the ns board.

Giannis Anastasopoulos — Fri, 06 Sep 2019 10:44:32 GMT

Perhaps, in order to make my situation more clear to you, I have a requirement to send messages with a timestamp, every so often and also, while my application is working, I need to monitor at what moment a certain event occurred. What I noticed is that different networks have different behaviour on the AT+CCLK? command and because I need my application to work universally, I cannot rely on getting my time from the network.

Instead, now I am getting the EPOCH time from my server once a day (let's say) and I want to update that time every second in a power efficient way, so that the device keeps track of the EPOCH time, without querying my server all the time. So I wonder if there is a solution that will allow me to do that while in PSM, or when the device is in sleep mode.

Any suggestions are very much welcome!

RE: Trying to run the RTC sample code from ncs/zephyr/samples/drivers with the ns board.

Giannis Anastasopoulos — Fri, 06 Sep 2019 08:01:35 GMT

Thank you for your response Hakon. The result of the CCLK command is the following:

Which is the time that my device has been active and not the network time. So is there a way to get the network time instead of this?

RE: Trying to run the RTC sample code from ncs/zephyr/samples/drivers with the ns board.

Hakon — Fri, 06 Sep 2019 07:50:49 GMT

There is the at+cclk command that you can use to get a timestamp from the network, and as previously mentioned the zephyr kernel API can be used to implement a counter. I linked to the documentation in the previous comment, everything you need to know should be found there.

RE: Trying to run the RTC sample code from ncs/zephyr/samples/drivers with the ns board.

Giannis Anastasopoulos — Thu, 05 Sep 2019 16:42:58 GMT

Hakon thank you for your reply.

My application needs to transmit some data with utc timestamps. What I intended to do is get the time from Internet every so often (once a day let's say) and then have the rtc counting from the moment I last received my timestamp.

Is there a convinient way of doing this?

RE: Trying to run the RTC sample code from ncs/zephyr/samples/drivers with the ns board.

Hakon — Thu, 05 Sep 2019 16:08:37 GMT

Hey,

The rtc sample hasn't been ported yet. If you want a similar functionality you can use the zephyr kernel timer instead.

RE: Trying to run the RTC sample code from ncs/zephyr/samples/drivers with the ns board.

Giannis Anastasopoulos — Thu, 05 Sep 2019 14:29:50 GMT

If I comment out the CONFIG_RTC=y line from the prj.conf file the project will load but when I try to compile it, it will fail at this point #include <drivers/rtc.h>