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src/netman.h
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src/netman.h
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#include <ESP8266WiFi.h>
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#include <WiFiClient.h>
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#include <ESP8266WebServer.h>
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#include <Adafruit_SSD1306.h>
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#include <LittleFS.h>
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#include <DNSServer.h>
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#include <map>
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// Constants for the HTML pages and config file
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static const String beginHtml = "<!DOCTYPE html><html lang='en'><head><meta charset='UTF-8'><meta name='viewport' content='width=device-width, initial-scale=1.0'><title>SmartCube Configure</title><style>body{font-family:Arial,sans-serif;background-color:#f4f4f9;color:#333;display:flex;align-items:center;justify-content:center;height:100vh;margin:0}.container{width:100%;max-width:300px;padding:20px;background:#fff;border-radius:10px;box-shadow:0 4px 8px rgba(0,0,0,0.2);box-sizing:border-box}h2{margin-top:0;text-align:center;color:#0073e6}label{display:block;margin-bottom:5px;font-weight:bold}input[type='text'],input[type='password']{width:100%;padding:8px;margin-bottom:15px;border:1px solid #ccc;border-radius:4px;box-sizing:border-box}button{width:100%;padding:10px;background-color:#0073e6;color:white;border:none;border-radius:4px;cursor:pointer;font-size:16px}button:hover{background-color:#005bb5}table{width:100%;margin-top:20px}td{padding:5px;text-align:left}</style></head><body><div class='container'><h2>Configure AP</h2><table><tbody><tr><td><label for='ssid'>SSID</label></td><td><input id='ssid' type='text' placeholder='Enter SSID'/></td></tr><tr><td><label for='pass'>Password</label></td><td><input id='pass' type='password' placeholder='Enter Password'/></td></tr><tr><td colspan='2'><button onclick=\"location.href = '/add?ssid=' + encodeURIComponent(document.getElementById('ssid').value) + '&pass=' + encodeURIComponent(document.getElementById('pass').value);\">Add Network</button></td></tr></tbody></table><br/><table><tbody>";
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static const String endHtml = "</tbody></table></body></html>";
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static const String configFile = "/netman";
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// Timeout for WiFi connection attempts
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static const unsigned long connectionTimeout = 15000; // 15 seconds
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struct netman {
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public:
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netman(Adafruit_SSD1306& display);
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netman(String ssid, String pass, bool hidden, Adafruit_SSD1306& display);
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bool start();
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void reset();
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void addSsid(String ssid, String password);
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void removeSsid(String ssid, String password);
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private:
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Adafruit_SSD1306& display;
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std::unique_ptr<ESP8266WebServer> server;
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std::map<String, String> _ssids;
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String _ssid, _pass;
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bool _hidden;
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void init(String ssid, String pass, bool hidden);
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bool tryConnectToSsid(const char* ssid, const char* pass);
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bool tryConnect();
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void createAP();
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bool redirectToIp();
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void readConfig();
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void writeConfig();
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void handleRoot();
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void handleAdd();
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void handleRemove();
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void handleSelect();
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};
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// Initialization
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void netman::init(String ssid, String pass, bool hidden) {
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// Ensure password meets minimum length
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if (pass != "" && pass.length() < 8) {
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display.clearDisplay();
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display.setCursor(0, 0);
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display.println("Password too short");
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display.display();
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pass = "8characters";
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}
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// Get the last 4 characters of the MAC address
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String macAddress = WiFi.macAddress();
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String macSuffix = macAddress.substring(macAddress.length() - 5);
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macSuffix.replace(":", "");
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// Set default SSID if none provided
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_ssid = ssid.isEmpty() ? "SmartCube_" + macSuffix : ssid;
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_pass = pass;
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_hidden = hidden;
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// Initialize LittleFS with error handling
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if (!LittleFS.begin()) {
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display.clearDisplay();
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display.setCursor(0, 0);
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display.println("FS init failed");
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display.display();
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}
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}
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// Constructors
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netman::netman(Adafruit_SSD1306& display) : display(display) {
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init("", "", false);
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}
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netman::netman(String ssid, String pass, bool hidden, Adafruit_SSD1306& display) : display(display) {
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init(ssid, pass, hidden);
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}
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// Attempt to start and connect or create AP
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bool netman::start() {
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if (_pass == "8characters") {
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display.clearDisplay();
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display.setCursor(0, 0);
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display.println("Using default pass:");
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display.println("8characters");
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display.display();
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}
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return tryConnect() || (createAP(), false);
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}
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// Attempt connection to each saved SSID in order
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bool netman::tryConnect() {
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readConfig();
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for (auto const& item : _ssids) {
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if (tryConnectToSsid(item.first.c_str(), item.second.c_str())) {
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return true;
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}
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}
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return false;
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}
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// Attempt to connect to a specific SSID with timeout, dot animation, and IP display
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bool netman::tryConnectToSsid(const char* ssid, const char* pass) {
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WiFi.begin(ssid, pass);
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unsigned long start = millis();
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// Clear display and set initial message
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display.clearDisplay();
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display.setCursor(0, 0);
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display.println("Connecting to WiFi:");
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display.setCursor(0, 11);
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display.println(String(ssid));
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display.display();
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int dotCount = 0;
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while (millis() - start < connectionTimeout) {
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delay(500);
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// Check WiFi connection status
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if (WiFi.status() == WL_CONNECTED) {
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// Success message with IP address
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display.clearDisplay();
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display.setCursor(0, 0);
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display.println("Connected!");
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display.setCursor(0, 12);
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display.print("IP: ");
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display.println(WiFi.localIP());
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display.display();
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delay(500);
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return true;
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}
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// Animate by adding dots
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display.setCursor(0, 20);
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for (int i = 0; i < dotCount; i++) {
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display.print(".");
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}
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display.display();
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dotCount = (dotCount + 1);
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}
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// Connection failed
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display.clearDisplay();
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display.setCursor(0, 0);
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display.println("Connection failed.");
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display.display();
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WiFi.disconnect();
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return false;
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}
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// Setup Access Point with DNS and HTTP server
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void netman::createAP() {
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WiFi.softAPdisconnect(true);
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WiFi.mode(WIFI_AP);
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WiFi.softAP(_ssid.c_str(), _pass.c_str(), 1, _hidden);
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display.clearDisplay();
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display.setCursor(0, 0);
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display.println("AccessPoint created");
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display.setCursor(0, 14);
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display.println("SSID:");
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display.setCursor(0, 24);
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display.setTextSize(1);
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display.println(_ssid.c_str());
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display.setTextSize(1);
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display.setCursor(0, 40);
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display.println("Config portal:");
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display.setCursor(0, 50);
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display.print("http://");
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display.println(WiFi.softAPIP().toString());
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display.display();
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server.reset(new ESP8266WebServer(80));
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DNSServer dnsServer;
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dnsServer.start(53, "*", WiFi.softAPIP());
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server->on("/", std::bind(&netman::handleRoot, this));
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server->on("/add", std::bind(&netman::handleAdd, this));
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server->on("/remove", std::bind(&netman::handleRemove, this));
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server->on("/select", std::bind(&netman::handleSelect, this));
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server->begin();
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while (true) {
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dnsServer.processNextRequest();
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server->handleClient();
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delay(10);
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}
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}
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// Redirect to AP IP if not accessed directly
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bool netman::redirectToIp() {
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if (server->hostHeader() == WiFi.softAPIP().toString()) {
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return false;
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}
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server->sendHeader("Location", "http://" + WiFi.softAPIP().toString(), true);
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server->send(302, "text/plain", "");
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server->client().stop();
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return true;
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}
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// Modify the addSsid function to take parameters from the `select` page
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void netman::addSsid(String ssid, String password) {
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_ssids[ssid] = password;
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writeConfig();
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// Attempt to connect to the selected network
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if (tryConnectToSsid(ssid.c_str(), password.c_str())) {
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// Redirect to the main page on success
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server->sendHeader("Location", "/", true);
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server->send(302, "text/plain", "");
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} else {
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// Show error message if connection failed
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server->send(200, "text/html", "<html><body><h2>Connection failed. Please try again.</h2></body></html>");
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}
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}
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// Remove SSID from config
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void netman::removeSsid(String ssid, String password) {
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if (_ssids.count(ssid) && _ssids[ssid] == password) {
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_ssids.erase(ssid);
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writeConfig();
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}
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}
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// Handle file-based config loading
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void netman::readConfig() {
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_ssids.clear();
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File file = LittleFS.open(configFile, "r");
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if (!file) {
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display.clearDisplay();
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display.setCursor(0, 0);
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display.println("Config not found");
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display.display();
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return;
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}
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while (file.available()) {
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String ssid = file.readStringUntil('\n');
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ssid.trim();
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String pass = file.readStringUntil('\n');
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pass.trim();
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_ssids[ssid] = pass;
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}
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file.close();
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}
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// Handle file-based config saving
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void netman::writeConfig() {
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File file = LittleFS.open(configFile, "w");
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for (const auto& item : _ssids) {
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file.println(item.first);
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file.println(item.second);
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}
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file.close();
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}
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// Reset configuration
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void netman::reset() {
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LittleFS.remove(configFile);
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_ssids.clear();
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}
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String urlEncode(const String &str) {
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String encoded = "";
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char c;
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for (size_t i = 0; i < str.length(); i++) {
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c = str.charAt(i);
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if (isalnum(c)) {
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encoded += c;
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} else {
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encoded += '%';
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char buf[3];
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snprintf(buf, sizeof(buf), "%02X", c);
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encoded += buf;
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}
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}
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return encoded;
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}
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void netman::handleRoot() {
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if (redirectToIp()) return;
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// Scan for available networks
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int n = WiFi.scanNetworks();
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String result = beginHtml;
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// Add stored SSIDs to the page
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result += "<h3>Saved Networks</h3>";
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for (const auto& item : _ssids) {
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result += "<tr><td><button onclick=\"location.href='/remove?ssid=' + escape('" + item.first + "') + '&pass=' + escape('" + item.second + "') \">×</button></td><td>" + item.first + "</td><td>-</td><td>" + item.second + "</td></tr>";
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}
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// Display available WiFi networks
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result += "</tbody></table><h3>Available Networks</h3><table><tbody>";
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for (int i = 0; i < n; i++) {
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// Get SSID and signal strength
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String ssid = WiFi.SSID(i);
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int rssi = WiFi.RSSI(i);
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bool openNetwork = (WiFi.encryptionType(i) == ENC_TYPE_NONE);
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// Show network with button to select
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result += "<tr><td><button onclick=\"location.href='/select?ssid=" + urlEncode(ssid) + "'\">" + ssid + "</button></td><td>" + (openNetwork ? "(Open)" : "(Secured)") + "</td><td>" + String(rssi) + " dBm</td></tr>";
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}
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result += endHtml;
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server->send(200, "text/html", result);
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}
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void netman::handleAdd() {
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server->send(200, "text/html", "The ESP will now reboot.");
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addSsid(server->arg("ssid"), server->arg("pass"));
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delay(500);
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ESP.restart();
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}
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void netman::handleRemove() {
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removeSsid(server->arg("ssid"), server->arg("pass"));
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handleRoot();
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}
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// Add SSID to config and save
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void netman::handleSelect() {
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String ssid = server->arg("ssid");
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String selectPage = "<!DOCTYPE html><html lang='en'><head><meta charset='UTF-8'><meta name='viewport' content='width=device-width, initial-scale=1.0'><title>Connect to " + ssid + "</title><style>body{font-family:Arial,sans-serif;background-color:#f4f4f9;color:#333;display:flex;align-items:center;justify-content:center;height:100vh;margin:0}.container{width:100%;max-width:300px;padding:20px;background:#fff;border-radius:10px;box-shadow:0 4px 8px rgba(0,0,0,0.2);box-sizing:border-box}h2{margin-top:0;text-align:center;color:#0073e6}label{display:block;margin-bottom:5px;font-weight:bold}input[type='password']{width:100%;padding:8px;margin-bottom:15px;border:1px solid #ccc;border-radius:4px;box-sizing:border-box}button{width:100%;padding:10px;background-color:#0073e6;color:white;border:none;border-radius:4px;cursor:pointer;font-size:16px}button:hover{background-color:#005bb5}</style></head><body><div class='container'><h2>Connect to " + ssid + "</h2><form action='/add' method='get'><input type='hidden' name='ssid' value='" + ssid + "'><label for='pass'>Password:</label><input id='pass' type='password' name='pass' placeholder='Enter Password'><button type='submit'>Connect</button></form></div></body></html>";
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server->send(200, "text/html", selectPage);
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}
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