新增WiFi-STA模式联网案例
This commit is contained in:
艾彬
parent
32346e353f
commit
bcda109949
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@ -78,6 +78,7 @@
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| TW105 | I2C | i2c_sht30 | [I2C温湿度传感器采集](applications/app/TW105_I2C_sht30/README.md) | 核心板 + 马达扩展板|
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| TW106 | UART | uart | [UART串口自发自收](applications/app/TW106_UART/README.md) | 核心板 |
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| TW201 | Module | oled | [OLED显示屏驱动](applications/app/TW201_Module_oled/README.md) | 核心板 + OLED扩展板|
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| TW301 | Network | wifista | [WiFi-STA连接演示](applications/app/TW301_Network_wifista/README.md) | 核心板 |
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## 五、源码目录简介
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@ -29,5 +29,6 @@ lite_component("app") {
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# "TW105_I2C_sht30:i2c_sht30",
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# "TW106_UART:uart_example",
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# "TW201_Module_oled:module_oled_example",
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# "TW301_Network_wifista:network_wifista_example",
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]
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}
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@ -27,4 +27,5 @@
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| TW104 | ADC | adc_voltage | [ADC电压采集](applications/app/TW104_ADC_voltage/README.md) | 核心板 + OLED扩展板|
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| TW105 | I2C | i2c_sht30 | [I2C温湿度传感器采集](applications/app/TW105_I2C_sht30/README.md) | 核心板 + 马达扩展板|
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| TW106 | UART | uart | [UART串口自发自收](applications/app/TW106_UART/README.md) | 核心板 |
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| TW201 | Module | oled | [OLED显示屏驱动](applications/app/TW201_Module_oled/README.md) | 核心板 + OLED扩展板|
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| TW201 | Module | oled | [OLED显示屏驱动](applications/app/TW201_Module_oled/README.md) | 核心板 + OLED扩展板|
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| TW301 | Network | wifista | [WiFi-STA连接演示](applications/app/TW301_Network_wifista/README.md) | 核心板 |
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# See the License for the specific language governing permissions and
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# limitations under the License.
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static_library("uart_test"){
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static_library("uart_example"){
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sources =[
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"uart_example.c"
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]
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@ -0,0 +1,25 @@
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# Copyright (c) 2021 Talkweb Co., Ltd.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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static_library("network_wifista_example") {
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sources = [
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"wifi_connect_demo.c",
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]
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include_dirs = [
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"//utils/native/lite/include",
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"//kernel/liteos_m/kal/cmsis",
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"//foundation/communication/wifi_lite/interfaces/wifiservice",
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"//device/talkweb/niobe/sdk_liteos/third_party/lwip_sack/include",
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]
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}
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@ -0,0 +1,322 @@
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# Niobe开发板WiFi-STA联网演示
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本案例程序将演示怎么在拓维Niobe WiFi IoT Core开发板上编写一个连接Wifi热点的业务程序，实现开发板联网效果。
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## Wifi API分析
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本案例主要使用了以下几个API完成Wifi联网
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## RegisterWifiEvent()
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```
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WifiErrorCode RegisterWifiEvent (WifiEvent * event)
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```
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**描述：** 为指定的Wi-Fi事件注册回调函数。当WifiEvent中定义的Wi-Fi事件发生时，将调用已注册的回调函数
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**参数：**
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| 名字 | 描述 |
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| ----- | --------------------- |
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| event | 表示要注册回调的事件. |
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## UnRegisterWifiEvent()
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```
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WifiErrorCode UnRegisterWifiEvent (WifiEvent * event)
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```
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**描述：** 为指定的Wi-Fi事件取消已经注册的回调函数。
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**参数：**
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| 名字 | 描述 |
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| ----- | ------------------------- |
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| event | 表示已经注册的回调的事件. |
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## EnableWifi()
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```
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WifiErrorCode EnableWifi (void )
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```
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**描述：**
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启用STA模式
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## DisableWifi()
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```
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WifiErrorCode DisableWifi (void )
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```
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**描述：**
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禁用STA模式
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## AddDeviceConfig()
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```
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WifiErrorCode AddDeviceConfig (const WifiDeviceConfig * config, int * result )
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```
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**描述：**
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添加用于配置连接到热点信息，此函数生成一个networkId
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**参数：**
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| 名字 | 描述 |
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| ------ | -------------------------------------------------- |
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| config | 表示要连接的热点信息. |
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| result | 表示生成的networkId。每个networkId匹配一个热点配置 |
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## ConnectTo()
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```
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WifiErrorCode ConnectTo (int networkId)
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```
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**描述：**
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连接到指定networkId的热点
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**参数：**
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| 名字 | 描述 |
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| --------- | --------------------------- |
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| networkId | 表示与目标热点匹配的网络id. |
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## Disconnect()
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```
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WifiErrorCode Disconnect (void)
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```
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**描述：**
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断开已连接到的热点
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## netifapi_netif_find()
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```
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struct netif *netifapi_netif_find(const char *name);
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```
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**描述：**
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获取netif用于IP操作
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## netifapi_dhcp_start()
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```
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err_t netifapi_dhcp_start(struct netif *netif);
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```
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**描述：**
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启动DHCP, 获取IP
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## dhcp_clients_info_show()
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```
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void dhcp_clients_info_show(struct netif *netif_p);
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```
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**描述：**
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格式化DHCP信息到控制台
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## netifapi_netif_common()
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```
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err_t netifapi_netif_common(struct netif *netif, netifapi_void_fn voidfunc, netifapi_errt_fn errtfunc);
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```
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**描述：**
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此函数主要是保证voidfunc和errtfunc在安全线程中执行。
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## 软件设计
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**主要代码分析**
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完成Wifi热点的连接需要以下几步
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1. 通过 `RegisterWifiEvent` 接口向系统注册扫描状态监听函数，用于接收扫描状态通知，如扫描动作是否完成等。
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`OnWifiConnectionChanged` 用于绑定连接状态监听函数，该回调函数有两个参数 `state` 和 `info` ；
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state表示扫描状态，取值为0和1，1表示热点连接成功；
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info表示Wi-Fi连接信息，包含以下参数；
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| 名字 | 描述 |
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| ------------------------ | ------------------- |
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| ssid [WIFI_MAX_SSID_LEN] | 连接的热点名称. |
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| bssid [WIFI_MAC_LEN] | MAC地址. |
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| rssi | 接收信号强度(RSSI). |
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| connState | Wifi连接状态. |
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| disconnectedReason | Wi-Fi断开的原因. |
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| ipAddress | 连接的特点IP地址 |
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2. 调用 `EnableWifi` 接口，启动 Wifi STA模式。
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3. 调用 `AddDeviceConfig` 接口，配置连接的热点信息。
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4. 调用 `ConnectTo` 接口，连接到指定networkId的热点。
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5. while循环等待，该过程中会有几秒钟的时间去轮询WiFi连接成功标志位 `g_wifiState`，当`g_wifiState` 为 1 时退出等待。
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6. 调用 `netifapi_netif_find` 接口，获取 netif 用于 IP 操作。
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7. 调用 `netifapi_dhcp_start` 接口，启动 DHCP, 获取 IP。
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8. 调用`netifapi_netif_common`接口，打印HDCP信息。
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9. 如果DHCP IP获取失败，断开WiFi连接，重新启动。
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```c
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static void IotWifiConnectTask(void *arg)
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{
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(void)arg;
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WifiErrorCode errCode;
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WifiEvent eventListener = {
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.OnWifiConnectionChanged = OnWifiConnectionChanged,
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.OnWifiScanStateChanged = OnWifiScanStateChanged};
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WifiDeviceConfig apConfig = {
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.ssid = DEFAILT_WIFI_SSID,
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.preSharedKey = DEFAILT_WIFI_PASSWORD,
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.securityType = WIFI_SEC_TYPE_PSK};
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Delay(10);
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errCode = RegisterWifiEvent(&eventListener);
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printf("RegisterWifiEvent errCode: %d\r\n", errCode);
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while (1)
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{
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int networkId = -1;
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//启动WiFi STA模式
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errCode = EnableWifi();
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printf("EnableWifi errCode: %d\r\n", errCode);
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Delay(100);
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errCode = AddDeviceConfig(&apConfig, &networkId);
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printf("AddDeviceConfig errCode: %d\r\n", errCode);
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g_wifiState = 0;
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errCode = ConnectTo(networkId);
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printf("ConnectTo(%d) errCode: %d\r\n", networkId, errCode);
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while (!g_wifiState)
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{
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Delay(10);
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}
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printf("g_wifiState: %d\r\n", g_wifiState);
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Delay(3000);
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// 联网业务开始
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// 这里是网络业务代码...
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struct netif *iface = netifapi_netif_find("wlan0");
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if (iface)
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{
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err_t ret = netifapi_dhcp_start(iface);
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printf("netifapi_dhcp_start: %d\r\n", ret);
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Delay(2000); // 等待DHCP服务分配IP地址
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ret = netifapi_netif_common(iface, dhcp_clients_info_show, NULL);
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printf("netifapi_netif_common: %d\r\n", ret);
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g_wifiState = WIFI_STATE_AVALIABLE;
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break; //联网成功，退出循环
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}
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else
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{
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// 联网业务结束，断开和AP的连接
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Disconnect();
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RemoveDevice(networkId);
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//关闭WiFi STA模式
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errCode = DisableWifi();
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printf("DisableWifi errCode: %d\r\n", errCode);
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Delay(500);
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}
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}
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errCode = UnRegisterWifiEvent(&eventListener);
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printf("UnRegisterWifiEvent errCode: %d\r\n", errCode);
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}
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```
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## 编译调试
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### 修改对接热点的账号密码
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修改`wifi_connect_demo.h`第20行和21行的WiFi热点SSID和密码，改成自己环境中的WiFi热点。
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```
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//此处是默认测试WiFi连接热点，具体使用时，请修改WiFi的ssid和password
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#define DEFAILT_WIFI_SSID "DESKTOP-TALKWEB"
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#define DEFAILT_WIFI_PASSWORD "ai123456789"
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```
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### 修改 BUILD.gn 文件
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修改 `applications/app/BUILD.gn` 路径中的 BUILD.gn 文件，指定 `network_wifista_example` 参与编译。
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```
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# "TW208_Module_ds1307:module_ds1307_example",
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# "TW209_Module_gps:module_gps_example",
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"TW301_Network_wifista:network_wifista_example",
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# "TW302_Network_wifiap:network_wifiap_example",
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# "TW303_Network_mqttclient:network_mqttclient_example",
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# "TW304_Network_httpclient:network_httpclient_example",
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# "TW305_Network_ntpclient:network_ntpclient_example",
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```
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### 运行结果
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示例代码编译烧录代码后，按下开发板的RESET按键，通过串口助手查看日志，会打印连接到的Wifi热点信息。
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```
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entry wifi connect demo.
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RegisterWifiEvent errCode: 0
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EnableWifi errCode: 0
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AddDeviceConfig errCode: 0
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ConnectTo(1) errCode: 0
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No crash dump found!
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+NOTICE:SCANFINISH
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+NOTICE:CONNECTED
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OnWifiConnectionChanged 50, state = 1
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info: bssid: BA:81:98:01:A9:A5, rssi: 0, connState: 0, reason: 0, ssid: DESKTOP-TALKWEB
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g_wifiState: 1
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netifapi_dhcp_start: 0
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server :
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server_id : 192.168.137.1
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mask : 255.255.255.0, 1
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gw : 192.168.137.1
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T0 : 604800
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T1 : 302400
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T2 : 453600
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clients <1> :
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mac_idx mac addr state lease tries rto
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0 20579e6185a4 192.168.137.176 10 0 1 2
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netifapi_netif_common: 0
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UnRegisterWifiEvent errCode: 0
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```
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/*
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* Copyright (c) 2021 Talkweb Co.,ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "ohos_init.h"
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#include "cmsis_os2.h"
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#include "wifi_device.h"
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#include "lwip/netifapi.h"
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#include "lwip/api_shell.h"
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#include "wifi_connect_demo.h"
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int g_wifiState = 0;
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/**
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* @brief 打印WifiLinkedInfo信息
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* @param info 需要打印信息的WifiLinkedInfo指针
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*/
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static void PrintWifiLinkedInfo(WifiLinkedInfo *info)
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{
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if (!info)
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return;
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static char macAddress[32] = {0};
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unsigned char *mac = info->bssid;
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snprintf(macAddress, sizeof(macAddress), "%02X:%02X:%02X:%02X:%02X:%02X",
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mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
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printf("info: bssid: %s, rssi: %d, connState: %d, reason: %d, ssid: %s\r\n",
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macAddress, info->rssi, info->connState, info->disconnectedReason, info->ssid);
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}
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/**
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* @brief WiFi连接状态改变回调
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* @param state WiFi连接状态，参考WifiEventState
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* @param info WiFi连接信息
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*/
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static void OnWifiConnectionChanged(int state, WifiLinkedInfo *info)
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{
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if (!info)
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return;
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printf("%s %d, state = %d \r\n", __FUNCTION__, __LINE__, state);
|
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PrintWifiLinkedInfo(info);
|
||||
|
||||
g_wifiState = state;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief WiFi扫描状态改变回调
|
||||
* @param state WiFi连接状态，参考WifiEventState
|
||||
* @param size
|
||||
*/
|
||||
static void OnWifiScanStateChanged(int state, int size)
|
||||
{
|
||||
printf("%s %d, state = %X, size = %d\r\n", __FUNCTION__, __LINE__, state, size);
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief 毫秒级延时
|
||||
* @param ms 需要延迟的毫秒数
|
||||
*/
|
||||
static void Delay(uint32_t ms)
|
||||
{
|
||||
uint32_t usPerTicks = (1000 * 1000) / osKernelGetTickFreq();
|
||||
osDelay((ms * 1000) / usPerTicks);
|
||||
usleep((ms * 1000) % usPerTicks);
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief WiFi连接程序,CMSIS线程回调函数
|
||||
* @param arg 线程参数
|
||||
*/
|
||||
static void IotWifiConnectTask(void *arg)
|
||||
{
|
||||
(void)arg;
|
||||
|
||||
WifiErrorCode errCode;
|
||||
|
||||
WifiEvent eventListener = {
|
||||
.OnWifiConnectionChanged = OnWifiConnectionChanged,
|
||||
.OnWifiScanStateChanged = OnWifiScanStateChanged};
|
||||
|
||||
WifiDeviceConfig apConfig = {
|
||||
.ssid = DEFAILT_WIFI_SSID,
|
||||
.preSharedKey = DEFAILT_WIFI_PASSWORD,
|
||||
.securityType = WIFI_SEC_TYPE_PSK};
|
||||
|
||||
Delay(10);
|
||||
|
||||
errCode = RegisterWifiEvent(&eventListener);
|
||||
printf("RegisterWifiEvent errCode: %d\r\n", errCode);
|
||||
|
||||
while (1)
|
||||
{
|
||||
int networkId = -1;
|
||||
//启动WiFi STA模式
|
||||
errCode = EnableWifi();
|
||||
printf("EnableWifi errCode: %d\r\n", errCode);
|
||||
Delay(100);
|
||||
|
||||
errCode = AddDeviceConfig(&apConfig, &networkId);
|
||||
printf("AddDeviceConfig errCode: %d\r\n", errCode);
|
||||
|
||||
g_wifiState = 0;
|
||||
errCode = ConnectTo(networkId);
|
||||
printf("ConnectTo(%d) errCode: %d\r\n", networkId, errCode);
|
||||
|
||||
while (!g_wifiState)
|
||||
{
|
||||
Delay(10);
|
||||
}
|
||||
printf("g_wifiState: %d\r\n", g_wifiState);
|
||||
Delay(3000);
|
||||
|
||||
// 联网业务开始
|
||||
// 这里是网络业务代码...
|
||||
struct netif *iface = netifapi_netif_find("wlan0");
|
||||
if (iface)
|
||||
{
|
||||
err_t ret = netifapi_dhcp_start(iface);
|
||||
printf("netifapi_dhcp_start: %d\r\n", ret);
|
||||
|
||||
Delay(2000); // 等待DHCP服务分配IP地址
|
||||
|
||||
ret = netifapi_netif_common(iface, dhcp_clients_info_show, NULL);
|
||||
printf("netifapi_netif_common: %d\r\n", ret);
|
||||
|
||||
g_wifiState = WIFI_STATE_AVALIABLE;
|
||||
|
||||
break; //联网成功，退出循环
|
||||
}
|
||||
else
|
||||
{
|
||||
// 联网业务结束，断开和AP的连接
|
||||
Disconnect();
|
||||
RemoveDevice(networkId);
|
||||
|
||||
//关闭WiFi STA模式
|
||||
errCode = DisableWifi();
|
||||
printf("DisableWifi errCode: %d\r\n", errCode);
|
||||
Delay(500);
|
||||
}
|
||||
}
|
||||
|
||||
errCode = UnRegisterWifiEvent(&eventListener);
|
||||
printf("UnRegisterWifiEvent errCode: %d\r\n", errCode);
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief WiFi STA模式案例入口函数
|
||||
*/
|
||||
void IotWifiConnect(void)
|
||||
{
|
||||
|
||||
printf("\n\n entry wifi connect demo.\r\n");
|
||||
|
||||
osThreadAttr_t attr;
|
||||
|
||||
attr.name = "IotWifiConnectTask";
|
||||
attr.attr_bits = 0U;
|
||||
attr.cb_mem = NULL;
|
||||
attr.cb_size = 0U;
|
||||
attr.stack_mem = NULL;
|
||||
attr.stack_size = 10240;
|
||||
attr.priority = osPriorityNormal;
|
||||
|
||||
if (osThreadNew(IotWifiConnectTask, NULL, &attr) == NULL)
|
||||
{
|
||||
printf("[Talkweb Niobe] Falied to create IotWifiConnectTask!\n");
|
||||
}
|
||||
}
|
||||
|
||||
APP_FEATURE_INIT(IotWifiConnect);
|
||||
|
|
@ -0,0 +1,28 @@
|
|||
/*
|
||||
* Copyright (c) 2021 Talkweb Co.,ltd.
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
#ifndef WIFI_CONNECT_DEMO_H
|
||||
#define WIFI_CONNECT_DEMO_H
|
||||
|
||||
//此处是默认测试WiFi连接热点，具体使用时，请修改WiFi的ssid和password
|
||||
#define DEFAILT_WIFI_SSID "DESKTOP-TALKWEB"
|
||||
#define DEFAILT_WIFI_PASSWORD "ai123456789"
|
||||
|
||||
extern int g_wifiState;
|
||||
|
||||
void IotWifiConnect(void);
|
||||
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue