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

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：

1. #include
3. #include
5. #include
6. #include "hi_wifi_api.h"
7. #include "lwip/ip_addr.h"
8. #include "lwip/netifapi.h"
10. #define APP_INIT_VAP_NUM 2
11. #define APP_INIT_USR_NUM 2
13. static struct netif *g_lwip_netif = NULL;
15. /* clear netif's ip, gateway and netmask */
16. void hi_sta_reset_addr(struct netif *pst_lwip_netif)
17. {
18. ip4_addr_t st_gw;
19. ip4_addr_t st_ipaddr;
20. ip4_addr_t st_netmask;
21. printf("%s %d rn", __FILE__, __LINE__);
22. if (pst_lwip_netif == NULL) {
23. printf("hisi_reset_addr::Null param of netdevrn");
24. return;
25. }
27. IP4_ADDR(&st_gw, 0, 0, 0, 0);
28. IP4_ADDR(&st_ipaddr, 0, 0, 0, 0);
29. IP4_ADDR(&st_netmask, 0, 0, 0, 0);
31. netifapi_netif_set_addr(pst_lwip_netif, &st_ipaddr, &st_netmask, &st_gw);
32. }
34. void wifi_wpa_event_cb(const hi_wifi_event *hisi_event)
35. {
36. if (hisi_event == NULL)
37. return;
39. switch (hisi_event->event) {
40. case HI_WIFI_EVT_SCAN_DONE:
41. printf("WiFi: Scan results availablen");
42. break;
43. case HI_WIFI_EVT_CONNECTED:
44. printf("WiFi: Connectedn");
45. netifapi_dhcp_start(g_lwip_netif);
46. break;
47. case HI_WIFI_EVT_DISCONNECTED:
48. printf("WiFi: Disconnectedn");
49. netifapi_dhcp_stop(g_lwip_netif);
50. hi_sta_reset_addr(g_lwip_netif);
51. break;
52. case HI_WIFI_EVT_WPS_TIMEOUT:
53. printf("WiFi: wps is timeoutn");
54. break;
55. default:
56. break;
57. }
58. }
60. int hi_wifi_start_connect(void)
61. {
62. int ret;
63. errno_t rc;
64. hi_wifi_assoc_request assoc_req = {0};
66. /* copy SSID to assoc_req */
67. //热点名称
68. rc = memcpy_s(assoc_req.ssid, HI_WIFI_MAX_SSID_LEN + 1, "you ssid", sizeof("you ssid")); /* 9:ssid length */
69. if (rc != EOK) {
70. printf("%s %d rn", __FILE__, __LINE__);
71. return -1;
72. }
74. /*
75. * OPEN mode
76. * for WPA2-PSK mode:
77. * set assoc_req.auth as HI_WIFI_SECURITY_WPA2PSK,
78. * then memcpy(assoc_req.key, "12345678", 8).
79. */
80. //热点加密方式
81. assoc_req.auth = HI_WIFI_SECURITY_WPA2PSK;
83. /* 热点密码 */
84. memcpy(assoc_req.key, "you pwd", sizeof("you pwd"));
87. ret = hi_wifi_sta_connect(&assoc_req);
88. if (ret != HISI_OK) {
89. printf("%s %d rn", __FILE__, __LINE__);
90. return -1;
91. }
92. printf("%s %d rn", __FILE__, __LINE__);
93. //printf("%srn",g_lwip_netif->flags);
94. return 0;
95. }
97. int hi_wifi_start_sta(void)
98. {
99. int ret;
100. char ifname[WIFI_IFNAME_MAX_SIZE + 1] = {0};
101. int len = sizeof(ifname);
102. const unsigned char wifi_vap_res_num = APP_INIT_VAP_NUM;
103. const unsigned char wifi_user_res_num = APP_INIT_USR_NUM;
104. unsigned intnum = WIFI_SCAN_AP_LIMIT;
106. printf("%s %d rn", __FILE__, __LINE__);
108. ret = hi_wifi_init(wifi_vap_res_num, wifi_user_res_num);
109. if (ret != HISI_OK) {
110. printf("%s %d rn", __FILE__, __LINE__);
111. //return -1;
112. }
114. printf("%s %d rn", __FILE__, __LINE__);
115. ret = hi_wifi_sta_start(ifname, &len);
116. if (ret != HISI_OK) {
117. printf("%s %d rn", __FILE__, __LINE__);
118. return -1;
119. }
121. /* register call back function to receive wifi event, etc scan results event,
122. * connected event, disconnected event.
123. */
124. ret = hi_wifi_register_event_callback(wifi_wpa_event_cb);
125. if (ret != HISI_OK) {
126. printf("register wifi event callback faiLEDn");
127. }
129. /* acquire netif for IP operation */
130. g_lwip_netif = netifapi_netif_find(ifname);
131. if (g_lwip_netif == NULL) {
132. printf("%s: get netif failedn", __FUNCTION__);
133. return -1;
134. }
136. /* start scan, scan results event will be received soon */
137. ret = hi_wifi_sta_scan();
138. if (ret != HISI_OK) {
139. printf("%s %d rn", __FILE__, __LINE__);
140. return -1;
141. }
143. sleep(5); /* sleep 5s, waiting for scan result. */
145. hi_wifi_ap_info *pst_results = malloc(sizeof(hi_wifi_ap_info) * WIFI_SCAN_AP_LIMIT);
146. if (pst_results == NULL) {
147. printf("%s %d rn", __FILE__, __LINE__);
148. return -1;
149. }
151. ret = hi_wifi_sta_scan_results(pst_results, &num);
152. if (ret != HISI_OK) {
153. printf("%s %d rn", __FILE__, __LINE__);
154. free(pst_results);
155. return -1;
156. }
158. for (unsigned int loop = 0; (loop < num) && (loop < WIFI_SCAN_AP_LIMIT); loop++) {
159. printf("SSID: %sn", pst_results[loop].ssid);
160. }
161. free(pst_results);
163. /* if received scan results, select one SSID to connect */
164. ret = hi_wifi_start_connect();
165. if (ret != 0) {
166. printf("%s %d rn", __FILE__, __LINE__);
167. return -1;
168. }
171. return 0;
172. }
174. void hi_wifi_stop_sta(void)
175. {
176. int ret;
178. ret = hi_wifi_sta_stop();
179. if (ret != HISI_OK) {
180. printf("failed to stop stan");
181. }
183. ret = hi_wifi_deinit();
184. if (ret != HISI_OK) {
185. printf("failed to deinit wifin");
186. }
188. g_lwip_netif = NULL;
190. }

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：

1. extern int hi_wifi_start_sta(void);
2. 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：

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：

【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。