记下来讲模块的具体使用方法,当出现个别AT指令不能使用的时候，很可能固件不对，需要更新下。 接着选择自带esp8266驱动，配置如上图，结果如下已成功连接WiFi可以ping. 这里使用SAL套接字抽象层后，我们不必在关心底层，直接使用统一的标准库写。
#include <rtthread.h> #include <netdb.h> #include "stdio.h" #include <unistd.h> #include <stdlib.h> #include <string.h> /* RT-Thread 官网，支持 TLS 功能 */ #define SAL_TLS_HOST "192.168.1.24" #define SAL_TLS_PORT 8080 #define SAL_TLS_BUFSZ 1024 static const char *send_data = "GET /download/rt-thread.txt HTTP/1.1\r\n" "Host: www.rt-thread.org\r\n" "User-Agent: rtthread/4.0.1 rtt\r\n\r\n"; void sal_tls_test(void) { int ret, i; char *recv_data; struct hostent *host; int sock = -1, bytes_received; struct sockaddr_in server_addr; /* 通过函数入口参数url获得host地址（如果是域名，会做域名解析） */ host = gethostbyname(SAL_TLS_HOST); recv_data = rt_calloc(1, SAL_TLS_BUFSZ); if (recv_data == RT_NULL) { rt_kprintf("No memory\n"); return; } /* 创建一个socket，类型是SOCKET_STREAM，TCP 协议, TLS 类型 */ if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) { rt_kprintf("Socket error\n"); goto __exit; } /* 初始化预连接的服务端地址 */ server_addr.sin_family = AF_INET; server_addr.sin_port = htons(SAL_TLS_PORT); server_addr.sin_addr = *((struct in_addr *)host->h_addr); rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero)); if (connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) < 0) { rt_kprintf("Connect fail!\n"); goto __exit; } /* 发送数据到 socket 连接 */ ret = send(sock, send_data, strlen(send_data), 0); if (ret <= 0) { rt_kprintf("send error,close the socket.\n"); goto __exit; } while(1) { /* 接收并打印响应的数据，使用加密数据传输 */ bytes_received = recv(sock, recv_data, SAL_TLS_BUFSZ - 1, 0); if (bytes_received <= 0) { rt_kprintf("received error,close the socket.\n"); goto __exit; } rt_kprintf("recv data:\n"); for (i = 0; i < bytes_received; i++) { rt_kprintf("%c", recv_data[i]); } } __exit: if (recv_data) rt_free(recv_data); //if (sock >= 0) // closesocket(sock); } int main(void) { sal_tls_test(); return 0; }