AWR2944: How to send 20KB UDP packets in lwip_sendto?

Hi champion,

Customers want to send 20KB UDP packet with 'lwip_sendto' in AWR2944. The SDK version is mcu_plus_sdk_awr294x_08_01_01_06.

The API called is:

numberSend = lwip_sendto(sock, send_buf, 4096, 0,(struct sockaddr *)&server_addr, ServerSocketlen); 

But this API returns -1.

The same API returns 0 if packet length is less than 1500 bytes.

Do you know how to adjust Lwip configuration to support 20KB socket UDP packet?

Thanks,
Adam