Time sync up

[manikandan]

hello ,i am using sdk16 with nrf52852 DK  i can be able to get time using that nrf calendar example. Now i want to sync up the mobile time with Dk every time i connect with bluetooth we are developing our own customised app. My question is

1)if i get time from app how can i get that time and put that in nrf_cal_set_time function to make my clock run continuously?

2)i am using ble_app_uart example if anyone tells where would my timestamp from app comes in this example that would be helpful??

3)otherwise should i add new things to this example to get time??

thanks and regards

Manikandan V

[ovrebekk]

Hi Manikandan

I believe I already answered these questions in one of your other cases. 

Can you confirm whether or not you got some progress?

If you have more questions about this I suggest we continue the discussion here, to avoid the other case getting too long an confusing. 

Best regards
Torbjørn

[manikandan]

hello  i am using android and developed an customised app and doing something like this is

for (uint32_t i = 0; i < p_evt->params.rx_data.length; i++)
{
str[i]=p_evt->params.rx_data.p_data[i];

strcpy(buf,str);

uint8_t j=0;
char *pch = strtok (buf,"- :");
while (pch != NULL)
{

array[j]=pch;
j=j+1;
pch = strtok (NULL, "- :");
}
year=atoi(array[0]);
month=atoi(array[1]);
day=atoi(array[2]);
hour=atoi(array[3]);
minute=atoi(array[4]);
second=atoi(array[5]);
....

}

note: i am sending the current time from app everytime i connect with bluetooth and getting the exact values in year,hour,...,seconds variable.

but if  i call nrf_cal_set_time(..) in main to starts from 1970  but not with the time i sent

my main looks like this

int main();

{

//all init

nrf_cal_set_time(year, month, day, hour, minute, second); 

while(1)
{

length=sprintf(cal_string,"%s", nrf_cal_get_time_string(true)); 

ble_nus_data_send(&m_nus,cal_string,&length,m_conn_handle);
}

}

where should i call nrf_cal_set_time(..) in my program to make it run one time and start sending date and time from the time i sent.

Thanks and regards

Manikandan V

[ovrebekk]

Hi

My initial thought is that you seem to be over complicating things a little.

Can't you just code year/month/day/hour/minute/second each into a separate byte without converting to and from ascii representation?

Then you only need 6 bytes in total to represent a date and time update, and you can easily copy each byte from the rx_data.p_data buffer into the 6 variables (just remember to subtract 1970 from the year before sending it, and add it back here, since a single byte can't store numbers > 255).

Best regards
Torbjørn

[manikandan]

okie i have done that now i have 6 variables from year to second how can i set time using these variables where should i call nrf_cal_set_time(year, month, day, hour, minute, second); this function to set the time and start my program with that particular time

thanks and regards

manikandan v

[ovrebekk]

Hi Manikandan

Can't you just run the nrf_cal_set_time(..) function in the nus_data_handler() function, when the data is received?

Best regards
Torbjørn