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.

[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! ;-)

[Håkon Alseth]

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

[Jay_Lin]

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

[lara]

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?