Configuration

#include #include #include #include "esp_mac.h" // required - exposes esp_mac_type_t values const char* ap_ssid = "ESP32-AP"; const char* ap_password = "12345678"; const int userLedPin = 8; // Define the pin for the user LED const int buttonPin = 0; // Define the pin for the button WebServer server(80); String ssid, password, static_ip, hostname; bool isAPMode = false; void handleRoot() { String macAddress = getDefaultMacAddress(); String html = "Configuration"; html += ""; html += "

Board Configuration

"; html += "

"; server.send(200, "text/html", html); } void handleSave() { ssid = server.arg("ssid"); password = server.arg("password"); static_ip = server.arg("static_ip"); hostname = server.arg("hostname"); saveSettings(); server.send(200, "text/html", "Settings saved. Device will restart in client mode."); delay(2000); ESP.restart(); } void handleInfo() { String html = "Info"; html += ""; html += "

Connection Info

"; if (WiFi.status() == WL_CONNECTED) { html += "

Status: Connected

"; html += "

IP Address: " + WiFi.localIP().toString() + "

"; } else { html += "

Status: Not Connected

"; } html += "

"; server.send(200, "text/html", html); } void saveSettings() { EEPROM.writeString(0, ssid); EEPROM.writeString(32, password); EEPROM.writeString(64, static_ip); EEPROM.writeString(96, hostname); EEPROM.commit(); } void loadSettings() { ssid = EEPROM.readString(0); password = EEPROM.readString(32); static_ip = EEPROM.readString(64); hostname = EEPROM.readString(96); } void setup() { Serial.begin(115200); Serial.println("Setup started"); EEPROM.begin(128); pinMode(userLedPin, OUTPUT); digitalWrite(userLedPin, LOW); pinMode(buttonPin, INPUT_PULLUP); // Set the button pin as input with an internal pull-up resistor loadSettings(); // Stop AP mode if it was previously started WiFi.softAPdisconnect(true); // Check if the button is pressed at startup if (digitalRead(buttonPin) == LOW) { Serial.println("Button pressed at startup. Starting in AP mode."); startAPMode(); } else { if (ssid.length() > 0 && password.length() > 0) { Serial.println("Attempting to connect to WiFi with saved credentials:"); Serial.print("SSID: "); Serial.println(ssid); Serial.print("Password: "); Serial.println(password); WiFi.begin(ssid.c_str(), password.c_str()); Serial.print("Connecting to WiFi"); unsigned long startTime = millis(); while (WiFi.status() != WL_CONNECTED) { if (millis() - startTime >= 10000) { // 10 seconds timeout Serial.println("Failed to connect to WiFi."); startAPMode(); return; } Serial.print("."); delay(500); } Serial.println(); Serial.println("Connected to WiFi."); Serial.print("IP Address: "); Serial.println(WiFi.localIP()); Serial.print("Hostname: "); Serial.println(hostname); digitalWrite(userLedPin, HIGH); // Turn on the LED if connection is successful isAPMode = false; } else { Serial.println("No saved WiFi credentials found. Starting in AP mode."); startAPMode(); } } Serial.println("Setup completed"); } void loop() { server.handleClient(); blinkLed(); } void blinkLed() { static unsigned long lastBlinkTime = 0; static bool ledState = LOW; unsigned long interval = isAPMode ? 1000 : 3000; // 1 second interval for AP mode, 3 seconds for client mode if (millis() - lastBlinkTime >= interval) { ledState = !ledState; digitalWrite(userLedPin, ledState); lastBlinkTime = millis(); } } void startAPMode() { WiFi.softAP(ap_ssid, ap_password); Serial.println("Access Point Started"); Serial.print("IP Address: "); Serial.println(WiFi.softAPIP()); server.on("/", handleRoot); server.on("/save", handleSave); server.on("/info", handleInfo); server.begin(); isAPMode = true; } String getDefaultMacAddress() { String mac = ""; unsigned char mac_base[6] = {0}; if (esp_efuse_mac_get_default(mac_base) == ESP_OK) { char buffer[18]; // 6*2 characters for hex + 5 characters for colons + 1 character for null terminator sprintf(buffer, "%02X:%02X:%02X:%02X:%02X:%02X", mac_base[0], mac_base[1], mac_base[2], mac_base[3], mac_base[4], mac_base[5]); mac = buffer; } return mac; } String getInterfaceMacAddress(esp_mac_type_t interface) { String mac = ""; unsigned char mac_base[6] = {0}; if (esp_read_mac(mac_base, interface) == ESP_OK) { char buffer[18]; // 6*2 characters for hex + 5 characters for colons + 1 character for null terminator sprintf(buffer, "%02X:%02X:%02X:%02X:%02X:%02X", mac_base[0], mac_base[1], mac_base[2], mac_base[3], mac_base[4], mac_base[5]); mac = buffer; } return mac; }