NRF52840 date time example

RE: NRF52840 date time example

lara — Mon, 30 Dec 2024 05:57:34 GMT

iam using nrf52833dk..can i sync the data and time while connecting with bluetooth.

while connecting with central,it should sync the time and date of central.can we do this?

RE: NRF52840 date time example

Jay_Lin — Thu, 18 Aug 2022 06:25:45 GMT

Thanks for the reply I am using nrf52840 which can't use Date-time, thanks alot though

RE: NRF52840 date time example

Håkon Alseth — Wed, 17 Aug 2022 10:47:43 GMT

Hi,

To use the DATE_TIME library with other nRF devices than nRF9160, you need to specify these configurations:

CONFIG_DATE_TIME=y
CONFIG_DATE_TIME_MODEM=n
CONFIG_DATE_TIME_NTP=n

And then supply the time manually. Here's a small snippet on how to do that:

/*
 * Copyright (c) 2012-2014 Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr.h>
#include <date_time.h>
#include <sys/printk.h>

void main(void)
{
	// Set time to 8th of June, 2022, 16:00
	// unix timestamp: 1654704000000
	struct tm time = 
	{
  		.tm_sec = 00,
  		.tm_min = 00,
  		.tm_hour = 16,
  		.tm_mday = 8,
  		.tm_mon = 6-1,
  		.tm_year = 2022-1900,
  		.tm_wday = 3,
	};
	int err = date_time_set(&time);
	/* your err handling here */
	
	printk("Hello World! %s\n", CONFIG_BOARD);
	int64_t unix_timestamp = 0;

	// Wait 10 seconds to see that the timestamp increments 10 seconds
	k_sleep(K_SECONDS(10));

	err = date_time_now(&unix_timestamp);
	/* your err handling here */
	
	// Use https://www.epochconverter.com/ to convert to human readable
	printk("unix timestamp: %lld", unix_timestamp);
}

Kind regards,

Håkon

RE: NRF52840 date time example

nRF5xFanboy — Wed, 17 Aug 2022 09:01:23 GMT

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! ;-)

RE: NRF52840 date time example

Jay_Lin — Wed, 17 Aug 2022 08:53:30 GMT

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

RE: NRF52840 date time example

nRF5xFanboy — Wed, 17 Aug 2022 08:45:58 GMT

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.

RE: NRF52840 date time example

Jay_Lin — Wed, 17 Aug 2022 08:33:03 GMT

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

RE: NRF52840 date time example

nRF5xFanboy — Wed, 17 Aug 2022 08:25:19 GMT

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?

RE: NRF52840 date time example

Jay_Lin — Wed, 17 Aug 2022 08:19:38 GMT

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?

RE: NRF52840 date time example

nRF5xFanboy — Wed, 17 Aug 2022 08:08:29 GMT

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