ochui/Wifimanager.ino

## Wifimanager.ino
#include <EEPROM.h>
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <ESP8266HTTPClient.h>

ESP8266WebServer server(80);

String ssid, pass, content;
bool apmode = false;                              //Default AP mode status

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);                           //Serial monitor
  readData();                                     //Check EEPROM for stored credentials
  if (ssid.length() == 0) {                       //If not found set AP mode
    ap_mode();
  } else {
    if (testWifi()) {                             //If found try to connect to WiFi AP
      Serial.println("WiFi Connected!!!");
      apmode = false;
    } else {                                       //If failed set AP mode
      ap_mode();
    }
  }
}


void loop() {
  // put your main code here, to run repeatedly:
  if (digitalRead(D3) == LOW) {                   //If flash button is pressed
    ap_mode();                                    //Set AP mode
  }
  if (apmode) {
    server.handleClient();                        //If apmode is true listen to incoming connection.
  } else {
    if (WiFi.status() == WL_CONNECTED) {          //If WiFi connected
      //Your logic here
    }
  }
}

void ap_mode() {                                  //Function to set as AP mode
  Serial.println("AP Mode. Please connect to http://192.168.4.1 to configure");
  apmode = true;
  const char* ssidap = "espp8266ap";
  const char* passap = "";
  WiFi.mode(WIFI_AP);
  WiFi.softAP(ssidap, passap);
  Serial.println(WiFi.softAPIP());
  apmode = true;
  launchWeb(0);                                   //Create web server
}

void launchWeb(int webtype) {
  createWebServer(webtype);
  server.begin();
}

void createWebServer(int webtype) {             //Create web server HTML interface
  if (webtype == 0) { //AP mode
    server.on("/", []() {
      content = "<html><head><style>.button {background-color: #3CBC8D;";
      content += "color: white;padding: 5px 10px;text-align: center;text-decoration: none;";
      content += "display: inline-block;font-size: 14px;margin: 4px 2px;cursor: pointer;}";
      content += "input[type=text],[type=password]{width: 100%;padding: 5px 10px;";
      content += "margin: 5px 0;box-sizing: border-box;border: none;";
      content += "background-color: #3CBC8D;color: white;}</style></head><body>";
      content += "<h1>WIFI MANAGER</h1><br>";
      content += "<h3>Current Settings</h3>";
      content += "<table><tr><td><label> WiFi SSID</label></td><td><label>" + ssid + "</label></td></tr>";
      content += "<tr><td><label> WiFi Pasword</label></td><td><label>" + pass + "</label></td></tr></table><br><br>";
      content += "<form method='get' action='setting'>";
      content += "<h3>New WiFi Settings</h3>";
      content += "<table><tr><td><label>WiFi SSID</label></td><td><input type='text' name = 'ssid' lenght=32 ></td></tr>";
      content += "<tr><td><label> WiFi Password</label></td><td><input type='password' name = 'password' lenght=32></td></tr>";
      content += "<tr><td></td><td><input class=button type='submit'></td></tr></table></form>";
      content += "</body></html>";
      server.send(200, "text/html", content);
    });
    server.on("/setting", []() {                  //Respond handler for form submit button
      String ssidw = server.arg("ssid");
      String passw = server.arg("password");
      writeData(ssidw, passw);                    //Store data from HTML form to EEPROM
      content = "Success..please reboot";
      server.send(200, "text/html", content);
      delay(2000);
      ESP.restart();
    });
    server.on("/clear", []() {                   //Clear data in EEPROM
      clearData();
      delay(2000);
      ESP.restart();
    });
  }
}

void readData() {                                 //Read from EEPROM memory
  EEPROM.begin(512);
  Serial.println("Reading From EEPROM..");
  for (int i = 0; i < 20; i++) {                  //Reading for SSID max for 20 characters long
    if (char(EEPROM.read(i)) > 0) {
      ssid += char(EEPROM.read(i));
    }
  }
  for (int i = 20; i < 40; i++) {                 //Reading for WiFi password max for 40 characters long
    if (char(EEPROM.read(i)) > 0) {
      pass += char(EEPROM.read(i));
    }
  }

  Serial.println("Wifi ssid: " + ssid);
  Serial.println("Wifi password: " + pass);
  EEPROM.end();
}

void writeData(String a, String b) {              //Writing WiFi credentials to EEPROM
  clearData();                                    //Clear current EEPROM memory
  EEPROM.begin(512);
  Serial.println("Writing to EEPROM...");
  for (int i = 0; i < 20; i++) {                  //Writing for SSID max for 20 characters long
    EEPROM.write(i, a[i]);
  }
  for (int i = 20; i < 40; i++) {                 //Reading for password max for 40 characters long
    EEPROM.write(i, b[i - 20]);
    Serial.println(b[i]);
  }
  EEPROM.commit();
  EEPROM.end();
  Serial.println("Write Successfull");
}

void clearData() {                                //Clear current EEPROM memory function
  EEPROM.begin(512);
  Serial.println("Clearing EEPROM ");
  for (int i = 0; i < 512; i++) {
    Serial.print(".");
    EEPROM.write(i, 0);
  }
  EEPROM.commit();
  EEPROM.end();
}

boolean testWifi() {                            //Test WiFi connection function
  WiFi.softAPdisconnect();
  WiFi.disconnect();
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid.c_str(), pass.c_str());
  int c = 0;
  while (c < 50) {
    if (WiFi.status() == WL_CONNECTED) {
      WiFi.setAutoReconnect(true);
      WiFi.persistent(true);
      Serial.println(WiFi.status());
      Serial.println(WiFi.localIP());
      delay(100);
      return true;
    }
    Serial.print(".");
    delay(900);
    c++;
  }
  Serial.println("Connection time out...");
  return false;
}
	#include <EEPROM.h>
	#include <ESP8266WiFi.h>
	#include <ESP8266WebServer.h>
	#include <ESP8266HTTPClient.h>

	ESP8266WebServer server(80);

	String ssid, pass, content;
	bool apmode = false; //Default AP mode status

	void setup() {
	// put your setup code here, to run once:
	Serial.begin(115200); //Serial monitor
	readData(); //Check EEPROM for stored credentials
	if (ssid.length() == 0) { //If not found set AP mode
	ap_mode();
	} else {
	if (testWifi()) { //If found try to connect to WiFi AP
	Serial.println("WiFi Connected!!!");
	apmode = false;
	} else { //If failed set AP mode
	ap_mode();
	}
	}
	}



	void loop() {
	// put your main code here, to run repeatedly:
	if (digitalRead(D3) == LOW) { //If flash button is pressed
	ap_mode(); //Set AP mode
	}
	if (apmode) {
	server.handleClient(); //If apmode is true listen to incoming connection.
	} else {
	if (WiFi.status() == WL_CONNECTED) { //If WiFi connected
	//Your logic here
	}
	}
	}

	void ap_mode() { //Function to set as AP mode
	Serial.println("AP Mode. Please connect to http://192.168.4.1 to configure");
	apmode = true;
	const char* ssidap = "espp8266ap";
	const char* passap = "";
	WiFi.mode(WIFI_AP);
	WiFi.softAP(ssidap, passap);
	Serial.println(WiFi.softAPIP());
	apmode = true;
	launchWeb(0); //Create web server
	}

	void launchWeb(int webtype) {
	createWebServer(webtype);
	server.begin();
	}

	void createWebServer(int webtype) { //Create web server HTML interface
	if (webtype == 0) { //AP mode
	server.on("/", []() {
	content = "<html><head><style>.button {background-color: #3CBC8D;";
	content += "color: white;padding: 5px 10px;text-align: center;text-decoration: none;";
	content += "display: inline-block;font-size: 14px;margin: 4px 2px;cursor: pointer;}";
	content += "input[type=text],[type=password]{width: 100%;padding: 5px 10px;";
	content += "margin: 5px 0;box-sizing: border-box;border: none;";
	content += "background-color: #3CBC8D;color: white;}</style></head><body>";
	content += "<h1>WIFI MANAGER</h1><br>";
	content += "<h3>Current Settings</h3>";
	content += "<table><tr><td><label> WiFi SSID</label></td><td><label>" + ssid + "</label></td></tr>";
	content += "<tr><td><label> WiFi Pasword</label></td><td><label>" + pass + "</label></td></tr></table><br><br>";
	content += "<form method='get' action='setting'>";
	content += "<h3>New WiFi Settings</h3>";
	content += "<table><tr><td><label>WiFi SSID</label></td><td><input type='text' name = 'ssid' lenght=32 ></td></tr>";
	content += "<tr><td><label> WiFi Password</label></td><td><input type='password' name = 'password' lenght=32></td></tr>";
	content += "<tr><td></td><td><input class=button type='submit'></td></tr></table></form>";
	content += "</body></html>";
	server.send(200, "text/html", content);
	});
	server.on("/setting", []() { //Respond handler for form submit button
	String ssidw = server.arg("ssid");
	String passw = server.arg("password");
	writeData(ssidw, passw); //Store data from HTML form to EEPROM
	content = "Success..please reboot";
	server.send(200, "text/html", content);
	delay(2000);
	ESP.restart();
	});
	server.on("/clear", []() { //Clear data in EEPROM
	clearData();
	delay(2000);
	ESP.restart();
	});
	}
	}

	void readData() { //Read from EEPROM memory
	EEPROM.begin(512);
	Serial.println("Reading From EEPROM..");
	for (int i = 0; i < 20; i++) { //Reading for SSID max for 20 characters long
	if (char(EEPROM.read(i)) > 0) {
	ssid += char(EEPROM.read(i));
	}
	}
	for (int i = 20; i < 40; i++) { //Reading for WiFi password max for 40 characters long
	if (char(EEPROM.read(i)) > 0) {
	pass += char(EEPROM.read(i));
	}
	}

	Serial.println("Wifi ssid: " + ssid);
	Serial.println("Wifi password: " + pass);
	EEPROM.end();
	}

	void writeData(String a, String b) { //Writing WiFi credentials to EEPROM
	clearData(); //Clear current EEPROM memory
	EEPROM.begin(512);
	Serial.println("Writing to EEPROM...");
	for (int i = 0; i < 20; i++) { //Writing for SSID max for 20 characters long
	EEPROM.write(i, a[i]);
	}
	for (int i = 20; i < 40; i++) { //Reading for password max for 40 characters long
	EEPROM.write(i, b[i - 20]);
	Serial.println(b[i]);
	}
	EEPROM.commit();
	EEPROM.end();
	Serial.println("Write Successfull");
	}

	void clearData() { //Clear current EEPROM memory function
	EEPROM.begin(512);
	Serial.println("Clearing EEPROM ");
	for (int i = 0; i < 512; i++) {
	Serial.print(".");
	EEPROM.write(i, 0);
	}
	EEPROM.commit();
	EEPROM.end();
	}

	boolean testWifi() { //Test WiFi connection function
	WiFi.softAPdisconnect();
	WiFi.disconnect();
	WiFi.mode(WIFI_STA);
	WiFi.begin(ssid.c_str(), pass.c_str());
	int c = 0;
	while (c < 50) {
	if (WiFi.status() == WL_CONNECTED) {
	WiFi.setAutoReconnect(true);
	WiFi.persistent(true);
	Serial.println(WiFi.status());
	Serial.println(WiFi.localIP());
	delay(100);
	return true;
	}
	Serial.print(".");
	delay(900);
	c++;
	}
	Serial.println("Connection time out...");
	return false;
	}