玩嗨 OpenHarmony：自己动手做 Wi-Fi 热点

有人说OpenHarmony玩不起来，今天小编向大家介绍下如何用OpenHarmony做个Wi-Fi热点。

OpenHarmony全场景、全连接的特性，做个Wi-Fi热点并不复杂，只需要用OpenHarmony自带的WiFI API接口，加上润和Pegasus OpenHarmomy开发套件就能搞定。话不多说，上代码：

//wifi connect task

static void WifiConnectTask(void *arg)

{

    (void)arg;

    WifiErrorCode errCode;

    WifiEvent eventListener = {

        .OnWifiConnectionChanged = OnWifiConnectionChanged,

        .OnWifiScanStateChanged = OnWifiScanStateChanged

    };

    WifiDeviceConfig apConfig = {};

    int netId = -1;



    osDelay(10);

    errCode = RegisterWifiEvent(&eventListener);

    printf("RegisterWifiEvent: %d\r\n", errCode);



    // 配置要连接的热点的账号密码

    strcpy(apConfig.ssid, "ABCD");

    strcpy(apConfig.preSharedKey, "12345678");

    apConfig.securityType = WIFI_SEC_TYPE_PSK;



    while (1) {

        //打开wifi

        errCode = EnableWifi();

        printf("EnableWifi: %d\r\n", errCode);

        osDelay(11);

        //添加热点配置

        errCode = AddDeviceConfig(&apConfig, &netId);

        printf("AddDeviceConfig: %d\r\n", errCode);



        g_connected = 0;

        //连接热点

        errCode = ConnectTo(netId);

        printf("ConnectTo(%d): %d\r\n", netId, errCode);

        //等待wifi连接

        while (!g_connected) {

            osDelay(10);

        }

        printf("g_connected: %d\r\n", g_connected);

        osDelay(50);





        // 联网业务开始

        struct netif* iface = netifapi_netif_find("wlan0");

        if (iface) {

            err_t ret = netifapi_dhcp_start(iface);

            printf("netifapi_dhcp_start: %d\r\n", ret);



            osDelay(200); // wait DHCP server give me IP

            ret = netifapi_netif_common(iface, dhcp_clients_info_show, NULL);

            printf("netifapi_netif_common: %d\r\n", ret);

        }



        // 模拟一段时间的联网业务

        int timeout = 60;

        while (timeout--) {

            osDelay(100);

            printf("after %d seconds, I'll disconnect WiFi!\n", timeout);

        }



        // 联网业务结束

        err_t ret = netifapi_dhcp_stop(iface);

        printf("netifapi_dhcp_stop: %d\r\n", ret);



        Disconnect(); // disconnect with your AP



        RemoveDevice(netId); // remove AP config

        

        errCode = DisableWifi(); //close wifi

        printf("DisableWifi: %d\r\n", errCode);

        osDelay(200);

    }

}

代码量很少，用润和Pegasus OpenHarmomy开发套件，很快搞定。

下面为大家介绍这个套件。

Pegasus智能家居开发套件

润和满天星系列Pegasus OpenHarmomy开发套件首发于HDC 2020，是首批支持HarmonyOS 2.0的开发套件，是OpenHarmony官方推荐套件，由润和软件HiHope量身打造，已在OpenHarmomny社区和广大OpenHarmony开发者中得到广泛应用。

Demo说明

本Demo适用版本：OpenHarmony 1.0.1~3.0

OpenHarmony源码下载：

https://gitee.com/openharmony/docs/tree/master/zh-cn/release-notes

Demo源码下载：

https://gitee.com/openharmony-sig/knowledgedemotemp/tree/master/dev/teamx/demosta

附件1：OpenHarmony WiFi STA模式相关的API接口文件路径

foundation/communication/interfaces/kits/wifi_lite/wifiservice/wifi_device.h

所使用的API接口有：

API	接口说明
WifiErrorCode EnableWifi(void);	开启STA
WifiErrorCode DisableWifi(void);	关闭STA
int IsWifiActive(void);	查询STA是否已开启
WifiErrorCode Scan(void);	触发扫描
WifiErrorCode GetScanInfoList(WifiScanInfo* result, unsigned int* size);	获取扫描结果
WifiErrorCode AddDeviceConfig(const WifiDeviceConfig* config, int* result);	添加热点配置，成功会通过result传出netld
WifiErrorCode GetDeviceConfigs(WifiDeviceConfig* result, unsigned int* size);	获取本机所有热点配置
WifiErrorCode RemoveDevice(int networkId);	删除热点配置
WifiErrorCode ConnectTo(int networkId);	连接到热点
WifiErrorCode Disconnect(void);	断开热点连接
WifiErrorCode GetLinkedInfo(WifiLinkedInfo* result);	获取当前连接热点信息
WifiErrorCode RegisterWifiEvent(WifiEvent* event);	注册事件监听
WifiErrorCode UnRegisterWifiEvent(const WifiEvent* event);	解除事件监听
WifiErrorCode GetDeviceMacAddress(unsigned char* result);	获取Mac地址
WifiErrorCode AdvanceScan(WifiScanParams *params);	高级搜索

附件1：OpenHarmony WiFi STA模式相关的API接口文件路径

API	描述
netifapinetiffind	按名称查找网络接口
netifapidhcpstart	启动DHCP客户端
netifapidhcpstop	停止DHCP客户端

写在最后

我们最近正带着大家玩嗨OpenHarmony。如果你有好玩的东东，欢迎投稿，让我们一起嗨起来！有点子，有想法，有Demo，立刻联系我们：

合作邮箱：zzliang@atomsource.org