【HarmonyOS HiSpark Wi-Fi IoT 套件试用连载】Wifi操作，热点连接

开发板试用精选 2022-11-01 447

描述

本文来源电子发烧友社区，作者：华仔stm32，帖子地址：https://bbs.elecfans.com/jishu_2284739_1_1.html

根据连老师的教程：鸿蒙第4节 Hi3861 Wifi操作，热点连接。但是我用的liteOs直接复制过去还是不行的，仔细阅读源码后，修改好后可以连上热点了，下面分享一下我的例程：
1、在appdemosrc下新建wifi_demo.c:
然后建立如下代码：

#include
#include
#include
#include "hi_wifi_api.h"
#include "lwip/ip_addr.h"
#include "lwip/netifapi.h"
#define APP_INIT_VAP_NUM 2
#define APP_INIT_USR_NUM 2
static struct netif *g_lwip_netif = NULL;
/* clear netif's ip, gateway and netmask */
void hi_sta_reset_addr(struct netif *pst_lwip_netif)
{
ip4_addr_t st_gw;
ip4_addr_t st_ipaddr;
ip4_addr_t st_netmask;
printf("%s %d rn", __FILE__, __LINE__);
if (pst_lwip_netif == NULL) {
printf("hisi_reset_addr::Null param of netdevrn");
return;
}
IP4_ADDR(&st_gw, 0, 0, 0, 0);
IP4_ADDR(&st_ipaddr, 0, 0, 0, 0);
IP4_ADDR(&st_netmask, 0, 0, 0, 0);
netifapi_netif_set_addr(pst_lwip_netif, &st_ipaddr, &st_netmask, &st_gw);
}
void wifi_wpa_event_cb(const hi_wifi_event *hisi_event)
{
if (hisi_event == NULL)
return;
switch (hisi_event->event) {
case HI_WIFI_EVT_SCAN_DONE:
printf("WiFi: Scan results availablen");
break;
case HI_WIFI_EVT_CONNECTED:
printf("WiFi: Connectedn");
netifapi_dhcp_start(g_lwip_netif);
break;
case HI_WIFI_EVT_DISCONNECTED:
printf("WiFi: Disconnectedn");
netifapi_dhcp_stop(g_lwip_netif);
hi_sta_reset_addr(g_lwip_netif);
break;
case HI_WIFI_EVT_WPS_TIMEOUT:
printf("WiFi: wps is timeoutn");
break;
default:
break;
}
}
int hi_wifi_start_connect(void)
{
int ret;
errno_t rc;
hi_wifi_assoc_request assoc_req = {0};
/* copy SSID to assoc_req */
//热点名称
rc = memcpy_s(assoc_req.ssid, HI_WIFI_MAX_SSID_LEN + 1, "you ssid", sizeof("you ssid")); /* 9:ssid length */
if (rc != EOK) {
printf("%s %d rn", __FILE__, __LINE__);
return -1;
}
/*
* OPEN mode
* for WPA2-PSK mode:
* set assoc_req.auth as HI_WIFI_SECURITY_WPA2PSK,
* then memcpy(assoc_req.key, "12345678", 8).
*/
//热点加密方式
assoc_req.auth = HI_WIFI_SECURITY_WPA2PSK;
/* 热点密码 */
memcpy(assoc_req.key, "you pwd", sizeof("you pwd"));
ret = hi_wifi_sta_connect(&assoc_req);
if (ret != HISI_OK) {
printf("%s %d rn", __FILE__, __LINE__);
return -1;
}
printf("%s %d rn", __FILE__, __LINE__);
//printf("%srn",g_lwip_netif->flags);
return 0;
}
int hi_wifi_start_sta(void)
{
int ret;
char ifname[WIFI_IFNAME_MAX_SIZE + 1] = {0};
int len = sizeof(ifname);
const unsigned char wifi_vap_res_num = APP_INIT_VAP_NUM;
const unsigned char wifi_user_res_num = APP_INIT_USR_NUM;
unsigned int num = WIFI_SCAN_AP_LIMIT;
printf("%s %d rn", __FILE__, __LINE__);
ret = hi_wifi_init(wifi_vap_res_num, wifi_user_res_num);
if (ret != HISI_OK) {
printf("%s %d rn", __FILE__, __LINE__);
//return -1;
}
printf("%s %d rn", __FILE__, __LINE__);
ret = hi_wifi_sta_start(ifname, &len);
if (ret != HISI_OK) {
printf("%s %d rn", __FILE__, __LINE__);
return -1;
}
/* register call back function to receive wifi event, etc scan results event,
* connected event, disconnected event.
*/
ret = hi_wifi_register_event_callback(wifi_wpa_event_cb);
if (ret != HISI_OK) {
printf("register wifi event callback faiLEDn");
}
/* acquire netif for IP operation */
g_lwip_netif = netifapi_netif_find(ifname);
if (g_lwip_netif == NULL) {
printf("%s: get netif failedn", __FUNCTION__);
return -1;
}
/* start scan, scan results event will be received soon */
ret = hi_wifi_sta_scan();
if (ret != HISI_OK) {
printf("%s %d rn", __FILE__, __LINE__);
return -1;
}
sleep(5); /* sleep 5s, waiting for scan result. */
hi_wifi_ap_info *pst_results = malloc(sizeof(hi_wifi_ap_info) * WIFI_SCAN_AP_LIMIT);
if (pst_results == NULL) {
printf("%s %d rn", __FILE__, __LINE__);
return -1;
}
ret = hi_wifi_sta_scan_results(pst_results, &num);
if (ret != HISI_OK) {
printf("%s %d rn", __FILE__, __LINE__);
free(pst_results);
return -1;
}
for (unsigned int loop = 0; (loop < num) && (loop < WIFI_SCAN_AP_LIMIT); loop++) {
printf("SSID: %sn", pst_results[loop].ssid);
}
free(pst_results);
/* if received scan results, select one SSID to connect */
ret = hi_wifi_start_connect();
if (ret != 0) {
printf("%s %d rn", __FILE__, __LINE__);
return -1;
}
return 0;
}
void hi_wifi_stop_sta(void)
{
int ret;
ret = hi_wifi_sta_stop();
if (ret != HISI_OK) {
printf("failed to stop stan");
}
ret = hi_wifi_deinit();
if (ret != HISI_OK) {
printf("failed to deinit wifin");
}
g_lwip_netif = NULL;
}

复制代码

大家把you ssid、you pwd更换成自己的wifi热点名称与密码。
然后在app_main函数中增加：

extern int hi_wifi_start_sta(void);
hi_wifi_start_sta();

复制代码

编后编译下载就可以连上自己家的路由器了：
HiSpark

从路由器上看到连上一个客户端，ip地址为192.168.3.14,然后可以ping通：
HiSpark

【总结】经过这个示例的学习，可以设置自己的ssidpwd连上wifi。下一步学习tcpmqtt等示例。

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