#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <EEPROM.h>
const char* apSSID = "ESP8266_AP";
const char* apPassword = "password";
const int maxAttempts = 5;
const int eepromOffset = 0;
ESP8266WebServer server(80);
int ledPin = 2;
bool ledState = false;
bool connectedToWiFi = false;
String getHTMLHeader() {
String header = "<!DOCTYPE html><html><head><style>";
header += "body { font-family: Arial, Helvetica, sans-serif; margin: 20px; }";
header += "h1 { color: #333; }";
header += "label { display: block; margin-top: 10px; }";
header += "input[type=text], input[type=password] { width: 100%; padding: 8px; }";
header += "button { padding: 8px 16px; background-color: #4CAF50; color: white; border: none; cursor: pointer; }";
header += ".container { margin-top: 20px; }";
header += ".container:after { content: ''; display: table; clear: both; }";
header += ".left { width: 50%; float: left; }";
header += ".right { width: 50%; float: right; }";
header += "</style></head><body>";
return header;
}
void handleRoot() {
String output = getHTMLHeader();
if (!connectedToWiFi) {
output += "<h1>Wi-Fi Configuration</h1>";
output += "<div class=\"container\">";
output += "<div class=\"left\">";
output += "<form action=\"/config\" method=\"POST\">";
output += "<label for=\"ssid\">SSID:</label>";
output += "<input type=\"text\" id=\"ssid\" name=\"ssid\"><br>";
output += "<label for=\"password\">Password:</label>";
output += "<input type=\"password\" id=\"password\" name=\"password\"><br>";
output += "<button type=\"submit\">Save</button>";
output += "</form>";
output += "</div>";
} else {
output += "<h1>ESP8266 LED Control</h1>";
output += "<div class=\"container\">";
output += "<div class=\"left\">";
output += "<p>LED Pin - State: " + String(ledState) + "</p>";
output += "<form action=\"/toggle\" method=\"POST\">";
output += "<button type=\"submit\">Toggle LED</button>";
output += "</form>";
output += "</div>";
}
output += "</div></body></html>";
server.send(200, "text/html", output);
}
void handleConfig() {
String ssid = server.arg("ssid");
String password = server.arg("password");
EEPROM.begin(512);
for (int i = 0; i < ssid.length(); i++) {
EEPROM.put(eepromOffset + i, ssid[i]);
}
EEPROM.put(eepromOffset + ssid.length(), '\0');
for (int i = 0; i < password.length(); i++) {
EEPROM.put(eepromOffset + ssid.length() + 1 + i, password[i]);
}
EEPROM.put(eepromOffset + ssid.length() + 1 + password.length(), '\0');
EEPROM.commit();
EEPROM.end();
WiFi.begin(ssid.c_str(), password.c_str());
int attempts = 0;
String message;
while (WiFi.status() != WL_CONNECTED && attempts < maxAttempts) {
delay(1000);
attempts++;
message = "Connection attempt " + String(attempts) + " of " + String(maxAttempts);
Serial.println(message);
}
if (WiFi.status() == WL_CONNECTED) {
connectedToWiFi = true;
message = "Connected to Wi-Fi";
Serial.println(message);
} else {
message = "Failed to connect to Wi-Fi";
Serial.println(message);
}
server.send(200, "text/html", getHTMLHeader() + "<h1>" + message + "</h1></body></html>");
}
void handleToggle() {
ledState = !ledState;
digitalWrite(ledPin, ledState);
handleRoot();
}
void setup() {
Serial.begin(9600);
EEPROM.begin(512);
String storedSSID = "";
char ch;
int i;
for (i = 0; i < 32; ++i) {
EEPROM.get(eepromOffset + i, ch);
if (ch == '\0') break;
storedSSID += ch;
}
String storedPassword = "";
for (int j = i + 1; j < 64; ++j) {
EEPROM.get(eepromOffset + j, ch);
if (ch == '\0') break;
storedPassword += ch;
}
EEPROM.end();
if (storedSSID != "" && storedPassword != "") {
WiFi.begin(storedSSID.c_str(), storedPassword.c_str());
int attempts = 0;
String message;
while (WiFi.status() != WL_CONNECTED && attempts < maxAttempts) {
delay(3000);
attempts++;
message = "Connection attempt " + String(attempts) + " of " + String(maxAttempts);
Serial.println(message);
}
if (WiFi.status() == WL_CONNECTED) {
connectedToWiFi = true;
message = "Connected to Wi-Fi";
Serial.println(message);
Serial.println(WiFi.localIP());
}
}
WiFi.mode(WIFI_AP);
WiFi.softAP(apSSID, apPassword);
Serial.println("Started AP mode");
Serial.print("AP IP address: ");
Serial.println(WiFi.softAPIP());
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, LOW);
server.on("/", handleRoot);
server.on("/config", handleConfig);
server.on("/toggle", handleToggle);
server.begin();
}
void loop() {
server.handleClient();
}
