NTP question on SPWF04Sx

[yoann LBY]

Posted on March 26, 2018 at 08:26

hi,

wifi module spwf04sx (FW1.1.0) in STA mode, connected to PC with NTP server (with wifi).

variable ip_ntp_startup set to '1'. variable ip_use_dhcpc set to '1'.

To receive message +WIND:84 i should set variable ip_ntp_server1 to @ip PC !

NTP server (PC) specifies a list of IP adresses indicating NTP server availible to the client. (option activated)

Q:  SPWF04Sx (client) should get from the list provided by the server? i shouldn't set ip_ntp_server1  !

Thks

Yoann

[Elio Cometti]

Posted on March 26, 2018 at 15:45

Hello Yoann,

as far as I understood, a secondary NTP server connect to one or more upstream servers to synchronize its local clock and can provide synchronization to dependent clients.

If you set up such a server on your PC then you can set the variable ip_ntp_server1 to the IP of your PC.

Could you tell more detail about your NTP server on the PC? (e.g. server implementation, )

In the past I set up an limifly python implementation of NTP server on my PC (see details

https://github.com/limifly/ntpserver/blob/master/ntpserver.py

).

On SPWF04:

AT+S.SCFG=ip_ntp_server1,192.168.1.112

AT+S.WCFG

AT+S.RESET

...

+WIND:24:WiFi Up:0:192.168.1.119

+WIND:84......

On PC:

sudo python ./ntpserver.py

local socket:  ('0.0.0.0', 123)

Received 1 packets

Sended to 192.168.1.119:123

Best Regards,

Elio