TCP收发参考了官方例程，具体网络部分配置如下：
TCP收发线程刚开始正常，过一会儿没有收发之后，服务器再发就收不到了 感觉接收线程阻塞活休眠了一样，有时候一点也收不到 有时候收到一两包

/ Network /

/ Socket abstraction layer /

define RT_USING_SAL

/ protocol stack implement /

define SAL_USING_LWIP

define SAL_USING_POSIX

/ Network interface device /

define RT_USING_NETDEV

define NETDEV_USING_IFCONFIG

define NETDEV_USING_PING

define NETDEV_USING_NETSTAT

define NETDEV_USING_AUTO_DEFAULT

define NETDEV_IPV4 1

define NETDEV_IPV6 0

/ light weight TCP/IP stack /

define RT_USING_LWIP

define RT_USING_LWIP202

define RT_LWIP_IGMP

define RT_LWIP_ICMP

define RT_LWIP_DNS

define RT_LWIP_DHCP

define IP_SOF_BROADCAST 1

define IP_SOF_BROADCAST_RECV 1

/ Static IPv4 Address /

define RT_LWIP_IPADDR "192.168.1.30"

define RT_LWIP_GWADDR "192.168.1.1"

define RT_LWIP_MSKADDR "255.255.255.0"

define RT_LWIP_UDP

define RT_LWIP_TCP

define RT_LWIP_RAW

define RT_MEMP_NUM_NETCONN 3

define RT_LWIP_PBUF_NUM 8

define RT_LWIP_RAW_PCB_NUM 2

define RT_LWIP_UDP_PCB_NUM 2

define RT_LWIP_TCP_PCB_NUM 2

define RT_LWIP_TCP_SEG_NUM 30

define RT_LWIP_TCP_SND_BUF 8196

define RT_LWIP_TCP_WND 8196

define RT_LWIP_TCPTHREAD_PRIORITY 10

define RT_LWIP_TCPTHREAD_MBOX_SIZE 8

define RT_LWIP_TCPTHREAD_STACKSIZE 1024

define RT_LWIP_ETHTHREAD_PRIORITY 12

define RT_LWIP_ETHTHREAD_STACKSIZE 1024

define RT_LWIP_ETHTHREAD_MBOX_SIZE 8

define LWIP_NETIF_STATUS_CALLBACK 1

define LWIP_NETIF_LINK_CALLBACK 1

define SO_REUSE 1

define LWIP_SO_RCVTIMEO 1

define LWIP_SO_SNDTIMEO 1

define LWIP_SO_RCVBUF 1

define LWIP_NETIF_LOOPBACK 0

define RT_LWIP_USING_PING

/ AT commands /

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