WiFiManager

第一步：这个库是跟ESP8266 Arduino核心库一起使用，所以用户需要配置好Arduino For ESP8266平台

第二步：可以通过Arduino IDE库管理器安装WiFiManager，搜索“WiFiManager”，然后点击下载

使用WifiManager三部曲：

• 引入头文件

  #include  

• 配置具体参数
• 启动WifiManager服务

例子源码：

#include           //https://github.com/esp8266/Arduino

//needed for library
#include 
#include 
#include          //https://github.com/tzapu/WiFiManager
#include           //https://github.com/bblanchon/ArduinoJson
//for LED status
#include 

void initSystem();
void initWifiManager();
void configModeCallback(WiFiManager *myWiFiManager);
void saveConfigCallback();
void tick();

//flag for saving data
bool shouldSaveConfig = false;
//for LED status
Ticker ticker;

//define your default values here, if there are different values in config.json, they are overwritten.
char mqtt_server[40];
char mqtt_port[6] = "8080";
char api_key[34] = "Your ApiKey";

void setup() {
  // put your setup code here, to run once:
  initSystem();
  initWifiManager();
  //if you get here you have connected to the WiFi
  Serial.println("connected...so easy :)");
  ticker.detach();
  //keep LED on
  digitalWrite(BUILTIN_LED, LOW);
}

void loop() {
  // put your main code here, to run repeatedly:

}


void initSystem(){
  Serial.begin(115200);
  Serial.println();
  //set led pin as output
  pinMode(BUILTIN_LED, OUTPUT);
  // start ticker with 0.5 because we start in AP mode and try to connect
  ticker.attach(0.6, tick);
}


void initWifiManager(){
  
  WiFiManager wifiManager;
  
  
  // 重置保存的修改 目标是为了每次进来都是去掉配置页面
  wifiManager.resetSettings();
  // 配置连接超时
  wifiManager.setConnectTimeout(60);
  // 打印调试内容
  wifiManager.setDebugOutput(true);
  // 设置最小信号强度
  wifiManager.setMinimumSignalQuality(30);
  // 设置固定AP信息
  IPAddress _ip = IPAddress(192, 168, 4, 25);
  IPAddress _gw = IPAddress(192, 168, 4, 1);
  IPAddress _sn = IPAddress(255, 255, 255, 0);
  wifiManager.setAPStaticIPConfig(_ip, _gw, _sn);
  // 设置进入AP模式的回调
  wifiManager.setAPCallback(configModeCallback);
  // 设置点击保存的回调
  wifiManager.setSaveConfigCallback(saveConfigCallback);
  // 设置 如果配置错误的ssid或者密码 退出配置模式
  wifiManager.setBreakAfterConfig(true);
  // 设置过滤重复的AP 默认可以不用调用 这里只是示范
  wifiManager.setRemoveDuplicateAPs(true);
  // 添加额外的参数 博哥这里只是示范 比如加入 mqtt 服务器地址 port 端口号  apikey 后面可以结合onenet使用
  WiFiManagerParameter custom_mqtt_server("server", "mqtt server", mqtt_server, 40);
  WiFiManagerParameter custom_mqtt_port("port", "mqtt port", mqtt_port, 6);
  WiFiManagerParameter custom_apikey("apikey", "onenet apikey", api_key, 32);
  wifiManager.addParameter(&custom_mqtt_server);
  wifiManager.addParameter(&custom_mqtt_port);
  wifiManager.addParameter(&custom_apikey);

  
  
  // ssid 命名为danpianjicainiao pwd是123456
  if (!wifiManager.autoConnect("danpianjicainiao","123456")) {
      Serial.println("failed to connect and hit timeout");
      //reset and try again, or maybe put it to deep sleep
      ESP.reset();
      delay(1000);
  }
  
  // 读取配置页面配置好的信息
  strcpy(mqtt_server, custom_mqtt_server.getValue());
  strcpy(mqtt_port, custom_mqtt_port.getValue());
  strcpy(api_key, custom_apikey.getValue());

  // 保存自定义信息
  if (shouldSaveConfig) {
      Serial.println("saving config");
      DynamicJsonBuffer jsonBuffer;
      JsonObject& json = jsonBuffer.createObject();
      json["mqtt_server"] = mqtt_server;
      json["mqtt_port"] = mqtt_port;
      json["api_key"] = api_key;
      json.printTo(Serial);
      //end save
  }

  Serial.println("local ip");
  Serial.println(WiFi.localIP());
}


void configModeCallback (WiFiManager *myWiFiManager) {
  Serial.println("Entered config mode");
  Serial.println(WiFi.softAPIP());
  //if you used auto generated SSID, print it
  Serial.println(myWiFiManager->getConfigPortalSSID());
  //entered config mode, make led toggle faster
  ticker.attach(0.2, tick);
}


void saveConfigCallback () {
  Serial.println("Should save config");
  shouldSaveConfig = true;
}


void tick(){
  //toggle state
  int state = digitalRead(BUILTIN_LED);  // get the current state of GPIO1 pin
  digitalWrite(BUILTIN_LED, !state);     // set pin to the opposite state
}