How to use SNTP over LwIP and RTC with an STM32

[BFlin.1]

Hello:
I have followed this exactly...
https://community.st.com/t5/stm32-mcus/how-to-use-sntp-over-lwip-and-rtc-with-an-stm32/ta-p/736706
I am using STM32CubeIDE V1.16.1 with a NUCLEO-H723ZG board.
There are no errors or warnings.
The code runns and I get...

SNTP Client
NUCLEO-H723ZG board
State: Ethernet Initialization ...
State: Looking for DHCP server ...
DHCP Timeout !!
Static IP address: 192.168.0.192

There is no red error light etc..
Can anyone help or perhaps B.Montanari ST Employee, (the author) etc. ?\
Thanks.

[Andrew Neil]

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@BFlin.1 wrote:

State: Looking for DHCP server ...
DHCP Timeout !!

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So do you have a DHCP server on the network?

[BFlin.1]

C:\Windows\SysWOW64>ipconfig /all | find /i "DHCP Server"
DHCP Server . . . . . . . . . . . : 10.0.0.1

[Andrew Neil]

That's the DHCP server that your PC is using.

What about your STM32 ?

[Imen.D]

Hello @BFlin.1 ,

Check your static IP address configurations. Make sure to enable the CPU DCache.

You can try this Nx_SNTP_Client example available in GitHub page and get inspired from this example to use it with Nucleo-H723ZG by following the instructions in the readme file.

[BFlin.1]

Maybe please take a look at my set up for issues etc.

Thanks

 

[LCE]

So what's your setup, direct connection STM32 ETH to PC ethernet port?

As Andrew says, your STM32 cannot simply connect to some DHCP server via your PC.

Maybe you can find a PC app, or maybe your switch has a DHCP server function?

[BFlin.1]

<So what's your setup, direct connection STM32 ETH to PC ethernet port?>

No, I am using straight cable to switch that goes to internet router.

[LCE]

Then check if your router has a DHCP server that can be activated.