> For the complete documentation index, see [llms.txt](https://tk233.gitbook.io/notes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tk233.gitbook.io/notes/stm32/connectivity/ethernet/ethernet.md).
# Ethernet - LWIP
## Setting up Ethernet PHY Layer
Under "Connectivity" tab, select ETH.
Set ETH mode to RMII, and make sure the pin mapping corresponds to the one on the Nucleo board
{% tabs %}
{% tab title="NUCLEO-F429ZI" %}
On the F429ZI Nucleo board, the pin mapping should look as follows.
{% endtab %}
{% tab title="NUCLEO-H755ZI" %}
On the H755ZI Nucleo board, the pin mapping should look as follows.
{% endtab %}
{% endtabs %}
## Setting up Middleware LWIP Protocol Layer
Under "Middleware and Software Packs" tab, select LWIP (Lightweight IP).
Enable the Lightweight IP functionality.
The Platform Settings will mark a warning icon. We will configure this at the last step.
Disable DHCP and manually set the IP
set MEM\_SIZE to 10K
Now, we configure the Platform Settings. For Nucleo 144 boards (F429, H755 etc.), we need to set to LAN8742, which corresponds to the U9 PHY IC on the board.
```c
/* USER CODE BEGIN 0 */
extern struct netif gnetif;
/* USER CODE END 0 */
...
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
ethernetif_input(&gnetif);
}
/* USER CODE END 3 */
```
## Testing
After configuration, the STM32 should be able to respond to ping requests.
## Reference
{% embed url="" %}
