无线通信：WIFI、MQTT 开发例程

// STA 模式
1.定义： int ConnectToHotspot(WifiDeviceConfig* apConfig);
功能： 连接WiFi
参数： WiFi相关参数比如SSID,passward
返回值： 1：成功
依赖： //foundation/communication/wifi_lite/interfaces/wifiservice
2.定义： void DisconnectWithHotspot(int netId);
**功能： 断开WiFi
参数： WiFi对应的netId
**返回值： 无
依赖： //foundation/communication/wifi_lite/interfaces/wifiservic

// AP模式
1.定义： int StartHotspot(const HotspotConfig* config);
功能： 开启AP
参数： AP参数包括：IP地址，默认网关，子网掩码
**返回值： 0：成功
依赖： //foundation/communication/wifi_lite/interfaces/wifiservice
2.定义： void StopHotspot(void);
功能： 断开AP
参数： 无
返回值： 无
依赖： //foundation/communication/wifi_lite/interfaces/wifiservice

static_library("wifi_control") {
sources = [
#"wifi_connecter.c",
"wifi_starter.c",
#"wifi_connect_demo.c",
"wifi_hotspot_demo.c",
]

import("//build/lite/config/component/lite_component.gni")
lite_component("app") {
features = [ "wifi_demo:wifi_control", ]
}

static void WifiConnectTask(void)
{
    osDelay(10); /* 10 = 100ms */
    // setup your AP params
    WifiDeviceConfig apConfig = { 0 };
    strcpy(apConfig.ssid, "H"); // 设置wifi ssid "h" Set wifi ssid
    strcpy(apConfig.preSharedKey, "12345678"); // 设置wifi passward "12345678" Set wifi password
    apConfig.securityType = WIFI_SEC_TYPE_PSK;

    int netId = ConnectToHotspot(&apConfig);
    int timeout = 60;
    while (timeout--) {
        printf("After %d seconds I will disconnect with AP!\r\n", timeout);
        /* 100相当于1s,60后WiFi断开 */
        /* 100 is equivalent to 1s, and the WiFi will be disconnected after 60 */
        osDelay(100);
    }
    DisconnectWithHotspot(netId);
}

#include "wifi_starter.h"

static void WifiHotspotTask(void)
{
    WifiErrorCode errCode;
    HotspotConfig config = { 0 };

    // 设置AP的配置参数 set configuration parameters for AP
    strcpy(config.ssid, "HiSpark-AP"); // AP :HiSpark-AP
    strcpy(config.preSharedKey, "12345678"); // Password：12345678
    config.securityType = WIFI_SEC_TYPE_PSK;
    config.band = HOTSPOT_BAND_TYPE_2G;
    config.channelNum = 7; /* 通道7 Channel 7 */

    osDelay(10); /* 10 = 100ms */

    printf("starting AP ...\r\n");
    errCode = StartHotspot(&config);
    printf("StartHotspot: %d\r\n", errCode);

    int timeout = 60; /* 60 = 1 minute */
    while (timeout--) {
        printf("After %d seconds Ap will turn off!\r\n", timeout);
        osDelay(100); /* 100 = 1s */
    }

    printf("stop AP ...\r\n");
    StopHotspot();
    printf("stop AP ...\r\n");
    osDelay(10); /* 10 = 100ms */
}

import("//build/lite/config/component/lite_component.gni")
lite_component("app") {
    features = [
        # "startup",
        # "iothardware:led_example",
            # iothardware指的是工程目录
            # :led_example指的是工程生成的静态库/文件
        # "wifi_demo:wifi_control",
        "D5_iot_mqtt:iot_mqtt",
    ]
}

static void MQTTDemoTask(void)
{
    WifiConnect("H", "12345678");
    printf("Starting ...\n");
    int rc, count = 0;
    MQTTClient client;

printf("MQTTSubscribe  ...\n");
  // 下面这行 "substopic" 修改为 "web_fan_btn" 
    rc = MQTTSubscribe(&client, "web_fan_btn", MQTT_QOS, messageArrived);
    if (rc != 0) {
        printf("MQTTSubscribe: %d\n", rc);
        osDelay(MQTT_DELAY_2S);
    }
   ····
   ·····
        message.payloadlen = strlen(payload);
   // 下面这行 "pubtopic" 修改为 "fan"
        if ((rc = MQTTPublish(&client, "fan", &message)) != 0) {
            printf("Return code from MQTT publish is %d\n", rc);
            NetworkDisconnect(&network);
            MQTTDisconnect(&client);
        }
        osDelay(MQTT_DELAY_500_MS);
    }
}
static void MQTTDemo(void)