TCPIP_UDP_SOCKET_POOL_BUFFER_SIZE Macro

#define TCPIP_UDP_SOCKET_POOL_BUFFER_SIZE 512 

Size of the buffers in the UDP pool. Any UDP socket that is enabled to use the pool and has the TX size <= than this size can use a buffer from the pool. Note that this setting, together with TCPIP_UDP_SOCKET_POOL_BUFFERS, has impact on the heap size that's used by the stack (see TCPIP_STACK_DRAM_SIZE setting).