SNTP Time wrong?!

[Blackfarmer]

Hello,

I used the new SDK API function to get a time via SNTP, but the time I received is wrong.

For example I received the time:
1432006860 (Mon May 18 21:41:00 2015)
but it should be
1431978060

The API describes only an offset for the sntp_get_real_time funtion, but not for the sntp_get_current_timestamp function.

So for me this is a bug in the sntp_get_current_timestamp function.

Also for me it is not necessary for the sntp_get_real_time function to add an fixed offset there. The offset should be a parameter or it can be done by adding the offset myself. It belongs to the user which time he wants to have.

Btw.
Great Chip with a great SDK!!! THANKS!

[ESP_Faye]

Hi,

Sorry for the inconvenience.

Description of sntp_get_current_timestamp is wrong, sntp default to be GMT+8 Time Zone now，we will add an API to set Time Zone.

Thanks for your interest in ESP8266 !

[Blackfarmer]

Hi,

this sounds very good! I have an additional question:

it seems, that the function sntp_get_current_timestamp() receives the time from an internal clock. I don't see, that every call on this functions invokes a new NTP request over the network.

What is the period, which the time is refreshed over NTP? Is it possible to change this settings? It would make it more convenient to get access to this parameters.

When do you expect to release the updated SDK?

Best regards
Blackfarmer

[Blackfarmer]

Hi again,

I think there is still a bug. Can you please check following behavior:

It's only a test snippet to get familiar with the SDK

Code: Select all

void ICACHE_FLASH_ATTR periodFnct0(void)
{
   uint32_t sys_time = system_get_time();
   printf("Timer Function 0 (Time: %d us)\n", sys_time);
   
   if (wifi_station_get_connect_status() == STATION_GOT_IP)
   {
      uint32_t current_stamp = sntp_get_current_timestamp();
      if (current_stamp != 0)
         printf("sntp: %d, %s\n", current_stamp, sntp_get_real_time(current_stamp-21600));
   }
}

If the system timer overflows from positiv to negative number, the time gets wrong:

correct:
Timer Function 0 (Time: 2146985873 us)
sntp: 1432866382, Thu May 28 20:26:22 2015

wrong:
Timer Function 0 (Time: -2146981423 us)
sntp: 1432862090, Thu May 28 19:14:50 2015

Note that this is tested with SDK 1.0.1, I have some problems to compile with 1.1.0, but I'm on discovering this. Should be not topic here.

Best regards
Blackfarmer

[ESP_Faye]

Hi，

Please have a try with the SDK_v1.1.2 http://bbs.espressif.com/viewforum.php?f=5

did your problem solved？

[SpenZerX]

Hi Espressif,

where is sntp_get_timezone ?

[ESP_Faye]

Hi,

Sorry that we don't have this API right now.

But we will add it in next SDK.

Thanks for your interest in ESP8266 !

[Blackfarmer]

Hi,

yes, in V1.1.2 this issue is fixed!

Thanks for it!

Best regards
Blackfarmer