Configuration

Relay Status

"; for (int i = 0; i < 4; i++) { html += "

Relay " + String(i + 1) + "

"; html += "

Status: " + String(digitalRead(relayPins[i]) == HIGH ? "ON" : "OFF") + "

"; html += "

"; } // Add input status html += "

Input Status

"; for (int i = 0; i < 4; i++) { html += "

Input " + String(i + 1) + "

"; html += "

Status: " + String(digitalRead(inputPins[i]) == LOW ? "Pressed" : "Not Pressed") + "

"; html += "

"; } } else { // If not connected to WiFi, show not connected message html += "

Connection Info

"; html += "

Status: Not Connected

"; html += "

"; } // End the HTML response html += ""; // Send the HTML response to the client server.send(200, "text/html", html); } // Handle the save URL ("/save") and save the WiFi settings void handleSave() { // Get the WiFi settings from the form ssid = server.arg("ssid"); password = server.arg("password"); static_ip = server.arg("static_ip"); netmask = server.arg("netmask"); gateway = server.arg("gateway"); hostname = server.arg("hostname"); logServerIP = server.arg("log_server_ip"); logServerPort = server.arg("log_server_port"); // Save the WiFi settings to EEPROM saveSettings(); // Send a response to the client and restart the device server.send(200, "text/html", "Settings saved. Device will restart in client mode."); delay(2000); ESP.restart(); } // Handle the relay control URL ("/relay") and control the relays void handleRelay() { // Get the relay index and action from the form int relay = server.arg("relay").toInt(); String action = server.arg("action"); // Control the relay based on the action if (relay >= 0 && relay < 4) { if (action == "on") { digitalWrite(relayPins[relay], HIGH); sendLog("Relay " + String(relay + 1) + " turned ON"); } else if (action == "off") { digitalWrite(relayPins[relay], LOW); sendLog("Relay " + String(relay + 1) + " turned OFF"); } } // Redirect the client back to the root URL server.sendHeader("Location", "/"); server.send(303); } // Save the WiFi settings to EEPROM void saveSettings() { EEPROM.writeString(0, ssid); EEPROM.writeString(32, password); EEPROM.writeString(64, static_ip); EEPROM.writeString(96, netmask); EEPROM.writeString(128, gateway); EEPROM.writeString(160, hostname); EEPROM.writeString(192, logServerIP); EEPROM.writeString(224, logServerPort); EEPROM.commit(); } // Load the WiFi settings from EEPROM void loadSettings() { ssid = EEPROM.readString(0); password = EEPROM.readString(32); static_ip = EEPROM.readString(64); netmask = EEPROM.readString(96); gateway = EEPROM.readString(128); hostname = EEPROM.readString(160); logServerIP = EEPROM.readString(192); logServerPort = EEPROM.readString(224); } void setup() { Serial.begin(115200); // Start the serial communication Serial.println("Setup started"); EEPROM.begin(256); // Initialize EEPROM with a size of 256 bytes pinMode(userLedPin, OUTPUT); // Set the user LED pin as output digitalWrite(userLedPin, LOW); // Turn off the user LED pinMode(buttonPin, INPUT_PULLUP); // Set the button pin as input with an internal pull-up resistor // Set the relay pins as output and turn off all relays at startup for (int i = 0; i < 4; i++) { pinMode(relayPins[i], OUTPUT); digitalWrite(relayPins[i], LOW); pinMode(inputPins[i], INPUT_PULLUP); // Set input pins as input with internal pull-up resistors } loadSettings(); // Load the WiFi settings from EEPROM // 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 { // Attempt to connect to WiFi with saved credentials 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); // Convert Strings to IPAddress objects IPAddress ip, gw, nm; if (!ip.fromString(static_ip) || !gw.fromString(gateway) || !nm.fromString(netmask)) { Serial.println("Invalid IP configuration. Starting in AP mode."); startAPMode(); return; } // Set hostname and static IP configuration WiFi.config(ip, gw, nm); WiFi.setHostname(hostname.c_str()); WiFi.begin(ssid.c_str(), password.c_str()); unsigned long startTime = millis(); while (WiFi.status() != WL_CONNECTED) { if (millis() - startTime >= 10000) { // 10 seconds timeout Serial.println("Failed to connect to WiFi. Starting in AP mode."); startAPMode(); return; } delay(500); } Serial.println("Connected to WiFi."); Serial.print("IP Address: "); Serial.println(WiFi.localIP()); Serial.print("Hostname: "); Serial.println(WiFi.getHostname()); digitalWrite(userLedPin, HIGH); // Turn on the LED if connection is successful isAPMode = false; startWebServer(); } else { Serial.println("No saved WiFi credentials found. Starting in AP mode."); startAPMode(); } } Serial.println("Setup completed"); logBoardStatus(); // Log the status of the board at startup } void loop() { server.handleClient(); // Handle client requests blinkLed(); // Blink the LED to indicate the mode printStatus(); // Print the status of the board // Send a log message every 20 seconds if (millis() - lastLogTime >= 20000) { sendLog("Board is functioning"); lastLogTime = millis(); } } // Blink the LED to indicate the mode (AP mode or client mode) 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(); } } // Print the status of the board every 20 seconds void printStatus() { if (millis() - lastStatusPrintTime >= 20000) { // 20 seconds interval Serial.println("Board Status:"); if (isAPMode) { Serial.println("Mode: Access Point"); Serial.print("AP SSID: "); Serial.println(ap_ssid); Serial.print("AP IP Address: "); Serial.println(WiFi.softAPIP()); } else { Serial.println("Mode: Client"); Serial.print("Connected to SSID: "); Serial.println(ssid); Serial.print("IP Address: "); Serial.println(WiFi.localIP()); Serial.print("Hostname: "); Serial.println(WiFi.getHostname()); } for (int i = 0; i < 4; i++) { Serial.print("Relay "); Serial.print(i + 1); Serial.print(": "); Serial.println(digitalRead(relayPins[i]) == HIGH ? "ON" : "OFF"); Serial.print("Input "); Serial.print(i + 1); Serial.print(": "); Serial.println(digitalRead(inputPins[i]) == LOW ? "Pressed" : "Not Pressed"); } Serial.println(); lastStatusPrintTime = millis(); } } // Start the Access Point mode 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("/relay", handleRelay); // Add handler for relay control server.begin(); isAPMode = true; } // Start the web server in client mode void startWebServer() { server.on("/", handleRoot); server.on("/save", handleSave); server.on("/relay", handleRelay); // Add handler for relay control server.begin(); } // Get the default MAC address of the ESP32 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; }

Board Configuration

Connection Info

Relay Status

Relay " + String(i + 1) + "

Input Status

Input " + String(i + 1) + "

Connection Info