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Test_setup_01.ino

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+#include <ESP8266WiFi.h>
+#include <DNSServer.h>
+#include <WiFiClient.h>
+#include <EEPROM.h>
+#include <ESP8266WebServer.h>
+
+const IPAddress apIP(192, 168, 1, 1);
+const char* apSSID = "ESP8266_SETUP";
+boolean settingMode;
+String ssidList;
+
+DNSServer dnsServer;
+ESP8266WebServer webServer(80);
+
+void setup() {
+  Serial.begin(115200);
+  EEPROM.begin(512);
+  delay(10);
+  if (restoreConfig()) {
+    if (checkConnection()) {
+      settingMode = false;
+      startWebServer();
+      return;
+    }
+  }
+  settingMode = true;
+  setupMode();
+}
+
+void loop() {
+  if (settingMode) {
+    dnsServer.processNextRequest();
+  }
+  webServer.handleClient();
+}
+
+boolean restoreConfig() 
+{
+    Serial.println("Reading EEPROM...");
+    String ssid = "";
+    String pass = "";
+    if (EEPROM.read(0) != 0) 
+    {
+        for (int i = 0; i < 32; ++i) 
+        {
+            ssid += char(EEPROM.read(i));
+        }
+        Serial.print("SSID: ");
+        Serial.println(ssid);
+        for (int i = 32; i < 96; ++i) 
+        {
+            pass += char(EEPROM.read(i));
+        }
+        Serial.print("Password: ");
+        Serial.println(pass);
+        WiFi.begin(ssid.c_str(), pass.c_str());
+        return true;
+    }
+    else
+    {
+        Serial.println("Config not found.");
+        return false;
+    }
+}
+
+boolean checkConnection() 
+{
+    int count = 0;
+    Serial.print("Waiting for Wi-Fi connection");
+    while ( count < 30 ) 
+    {
+        if (WiFi.status() == WL_CONNECTED) 
+        {
+            Serial.println();
+            Serial.println("Connected!");
+            return (true);
+        }
+        delay(500);
+        Serial.print(".");
+        count++;
+    }
+    Serial.println("Timed out.");
+    return false;
+}
+
+void startWebServer() 
+{
+    if (settingMode) 
+    {
+        Serial.print("Starting Web Server at ");
+        Serial.println(WiFi.softAPIP());
+        webServer.on("/settings", []() 
+        {
+            String s = "<h1>Wi-Fi Settings</h1><p>Please enter your password by selecting the SSID.</p>";
+            s += "<form method=\"get\" action=\"setap\"><label>SSID: </label><select name=\"ssid\">";
+            s += ssidList;
+            s += "</select><br>Password: <input name=\"pass\" length=64 type=\"password\"><input type=\"submit\"></form>";
+            webServer.send(200, "text/html", makePage("Wi-Fi Settings", s));
+        });
+        webServer.on("/setap", []() 
+        {
+            for (int i = 0; i < 96; ++i) 
+            {
+                EEPROM.write(i, 0);
+            }
+            String ssid = urlDecode(webServer.arg("ssid"));
+            Serial.print("SSID: ");
+            Serial.println(ssid);
+            String pass = urlDecode(webServer.arg("pass"));
+            Serial.print("Password: ");
+            Serial.println(pass);
+            Serial.println("Writing SSID to EEPROM...");
+            for (int i = 0; i < ssid.length(); ++i) 
+            {
+                EEPROM.write(i, ssid[i]);
+            }
+            Serial.println("Writing Password to EEPROM...");
+            for (int i = 0; i < pass.length(); ++i) 
+            {
+                EEPROM.write(32 + i, pass[i]);
+            }
+            EEPROM.commit();
+            Serial.println("Write EEPROM done!");
+            String s = "<h1>Setup complete.</h1><p>device will be connected to \"";
+            s += ssid;
+            s += "\" after the restart.";
+            webServer.send(200, "text/html", makePage("Wi-Fi Settings", s));
+            ESP.restart();
+        });
+        webServer.onNotFound([]() 
+        {
+            String s = "<h1>AP mode</h1><p><a href=\"/settings\">Wi-Fi Settings</a></p>";
+            webServer.send(200, "text/html", makePage("AP mode", s));
+        });
+    }
+    else 
+    {
+        Serial.print("Starting Web Server at ");
+        Serial.println(WiFi.localIP());
+        webServer.on("/", []() 
+        {
+            String s = "<h1>STA mode</h1><p><a href=\"/reset\">Reset Wi-Fi Settings</a></p>";
+            webServer.send(200, "text/html", makePage("STA mode", s));
+        });
+        webServer.on("/reset", []() 
+        {
+            for (int i = 0; i < 96; ++i) 
+            {
+                EEPROM.write(i, 0);
+            }
+            EEPROM.commit();
+            String s = "<h1>Wi-Fi settings was reset.</h1><p>Please reset device.</p>";
+            webServer.send(200, "text/html", makePage("Reset Wi-Fi Settings", s));
+        });
+    }
+    webServer.begin();
+}
+
+void setupMode() 
+{
+    WiFi.mode(WIFI_STA);
+    WiFi.disconnect();
+    delay(100);
+    int n = WiFi.scanNetworks();
+    delay(100);
+    Serial.println("");
+    for (int i = 0; i < n; ++i) 
+    {
+        ssidList += "<option value=\"";
+        ssidList += WiFi.SSID(i);
+        ssidList += "\">";
+        ssidList += WiFi.SSID(i);
+        ssidList += "</option>";
+    }
+    delay(100);
+    WiFi.mode(WIFI_AP);
+    WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0));
+    WiFi.softAP(apSSID);
+    dnsServer.start(53, "*", apIP);
+    startWebServer();
+    Serial.print("Starting Access Point at \"");
+    Serial.print(apSSID);
+    Serial.println("\"");
+}
+    
+String makePage(String title, String contents) 
+{
+    String s = "<!DOCTYPE html><html><head>";
+    s += "<meta name=\"viewport\" content=\"width=device-width,user-scalable=0\">";
+    s += "<title>";
+    s += title;
+    s += "</title></head><body>";
+    s += contents;
+    s += "</body></html>";
+    return s;
+}
+
+String urlDecode(String input) 
+{
+    String s = input;
+    s.replace("%20", " ");
+    s.replace("+", " ");
+    s.replace("%21", "!");
+    s.replace("%22", "\"");
+    s.replace("%23", "#");
+    s.replace("%24", "$");
+    s.replace("%25", "%");
+    s.replace("%26", "&");
+    s.replace("%27", "\'");
+    s.replace("%28", "(");
+    s.replace("%29", ")");
+    s.replace("%30", "*");
+    s.replace("%31", "+");
+    s.replace("%2C", ",");
+    s.replace("%2E", ".");
+    s.replace("%2F", "/");
+    s.replace("%2C", ",");
+    s.replace("%3A", ":");
+    s.replace("%3A", ";");
+    s.replace("%3C", "<");
+    s.replace("%3D", "=");
+    s.replace("%3E", ">");
+    s.replace("%3F", "?");
+    s.replace("%40", "@");
+    s.replace("%5B", "[");
+    s.replace("%5C", "\\");
+    s.replace("%5D", "]");
+    s.replace("%5E", "^");
+    s.replace("%5F", "-");
+    s.replace("%60", "`");
+    return s;
+}