#include <WiFi.h>
#include <WebServer.h>
#include <Preferences.h>
// #include <SoftwareSerial.h> // Uncomment if you are connecting SIM800L
// --- Basic Settings ---
#define MAX_CODES 10 // Maximum number of notification codes
// Global Variables
Preferences preferences;
WebServer server; // Initialize WebServer without a specific port here
int web_port = 80; // Default web server port
// WiFi Client Settings (Default)
String client_ssid = "Dara@home";
String client_pass = "rejeki88";
// New global variables for static IP configuration
String client_ip = "";
String client_gateway = "";
String client_subnet = "";
String client_dns1 = ""; // Optional: Primary DNS server
String client_dns2 = ""; // Optional: Secondary DNS server
// Access Point Settings (Fallback)
const char* ap_ssid = "PUTU@TECKNO-SIM800L";
const char* ap_pass = "rejeki88";
// Array to store allowed notification codes
String allowedCodes[MAX_CODES];
// New global variables for recipient phone numbers
String targetPhoneNumber1 = "";
String targetPhoneNumber2 = "";
String targetPhoneNumber3 = "";
// Variables to store current status
String lastNotification = "Belum ada";
String ipAddress = "N/A";
/*
// --- SETTINGS FOR SIM800L (EXAMPLE) ---
// Connect SIM800L TX pin to D2 (GPIO 2) and RX to D3 (GPIO 3)
// SoftwareSerial sim800l(2, 3); // RX, TX
// Function to send SMS to all configured phone numbers
void sendSMS(String message) {
Serial.println("Mengirim SMS: " + message);
// Array of target phone numbers for easier iteration
String phoneNumbers[] = {targetPhoneNumber1, targetPhoneNumber2, targetPhoneNumber3};
for (int i = 0; i < 3; i++) {
if (phoneNumbers[i] != "") { // Only send if the number is not empty
Serial.println("Mengirim ke: " + phoneNumbers[i]);
// sim800l.println("AT+CMGF=1"); // Set text mode
// delay(1000);
// sim800l.println("AT+CMGS=\"" + phoneNumbers[i] + "\"");
// delay(1000);
// sim800l.print(message); // Message content
// delay(100);
// sim800l.write(26); // CTRL+Z character to send
// delay(1000);
// Serial.println("SMS terkirim ke " + phoneNumbers[i]);
}
}
}
*/
// --- Web Server Functions ---
// Display the main web page
void handleRoot() {
// Construct the HTML page for configuration
String html = "<!DOCTYPE html><html><head><meta charset='UTF-8' name='viewport' content='width=device-width, initial-scale=1.0'>"
"<title>ESP32 Receiver Config</title>"
"<style>"
"body{font-family:Arial,sans-serif;background:#f2f2f2;margin:0;padding:15px;}"
".container{max-width:800px;margin:auto;background:white;padding:20px;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,0.1);}"
"h1,h2{color:#333;}"
"form label{display:block;margin-top:10px;font-weight:bold;}"
"form input[type='text'],form input[type='password']{width:calc(100% - 20px);padding:8px;margin-top:5px;border:1px solid #ccc;border-radius:5px;}"
"form input[type='submit']{background-color:#007bff;color:white;border:none;padding:12px 20px;border-radius:5px;cursor:pointer;font-size:16px;margin-top:20px;}"
".status{background:#e9f5ff;border-left:5px solid #007bff;padding:10px;margin-top:20px;}"
".grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(250px, 1fr));grid-gap:10px;}"
"</style></head><body>"
"<div class='container'>"
"<h1>Konfigurasi Penerima Notifikasi</h1>"
"<div class='status'>"
"<h2>Status Saat Ini</h2>"
"<strong>Status WiFi:</strong> " + (WiFi.status() == WL_CONNECTED ? "Terhubung ke " + client_ssid : "Mode Access Point Aktif") + "<br>"
"<strong>Alamat IP:</strong> " + ipAddress + "<br>"
"<strong>Port Web:</strong> " + String(web_port) + "<br>" // Display current web port
"<strong>Notifikasi Terakhir:</strong> " + lastNotification +
"</div>"
"<form action='/save' method='post'>"
"<h2>Pengaturan WiFi Client</h2>"
"<label for='ssid'>Nama WiFi (SSID):</label>"
"<input type='text' name='ssid' value='" + client_ssid + "'>"
"<label for='password'>Password WiFi:</label>"
"<input type='password' name='password' value='" + client_pass + "'>"
"<h2>Pengaturan Port Web</h2>" // New section for web port
"<label for='port'>Port Web (misalnya 80, 8080):</label>"
"<input type='text' name='port' value='" + String(web_port) + "'>"
"<h2>Pengaturan IP Statis (Kosongkan untuk DHCP)</h2>" // Section for static IP
"<label for='ip'>Alamat IP:</label>"
"<input type='text' name='ip' value='" + client_ip + "'>"
"<label for='gateway'>Gateway:</label>"
"<input type='text' name='gateway' value='" + client_gateway + "'>"
"<label for='subnet'>Subnet Mask:</label>"
"<input type='text' name='subnet' value='" + client_subnet + "'>"
"<label for='dns1'>DNS Primer (Opsional):</label>"
"<input type='text' name='dns1' value='" + client_dns1 + "'>"
"<label for='dns2'>DNS Sekunder (Opsional):</label>"
"<input type='text' name='dns2' value='" + client_dns2 + "'>"
"<h2>Nomor Telepon Penerima Notifikasi</h2>" // Section for phone numbers
"<label for='phone1'>Nomor HP 1:</label>"
"<input type='text' name='phone1' value='" + targetPhoneNumber1 + "'>"
"<label for='phone2'>Nomor HP 2:</label>"
"<input type='text' name='phone2' value='" + targetPhoneNumber2 + "'>"
"<label for='phone3'>Nomor HP 3:</label>"
"<input type='text' name='phone3' value='" + targetPhoneNumber3 + "'>"
"<h2>Kode Notifikasi yang Diizinkan (10 Kode)</h2>"
"<div class='grid'>";
// Add input fields for each allowed code
for (int i = 0; i < MAX_CODES; i++) {
html += "<div><label for='code" + String(i) + "'>Kode #" + String(i + 1) + "</label>"
"<input type='text' name='code" + String(i) + "' value='" + allowedCodes[i] + "'></div>";
}
html += "</div>"
"<input type='submit' value='Simpan Pengaturan & Restart'>"
"</form></div></body></html>";
// Send the HTML response to the client
server.send(200, "text/html", html);
}
// Save configuration from the form
void handleSave() {
// Begin preferences in read-write mode
preferences.begin("config", false);
// Save WiFi credentials
client_ssid = server.arg("ssid");
client_pass = server.arg("password");
preferences.putString("ssid", client_ssid);
preferences.putString("password", client_pass);
// Save web port settings
web_port = server.arg("port").toInt();
if (web_port == 0) web_port = 80; // Ensure a valid port, default to 80 if 0 or invalid
preferences.putInt("web_port", web_port);
// Save static IP settings
client_ip = server.arg("ip");
client_gateway = server.arg("gateway");
client_subnet = server.arg("subnet");
client_dns1 = server.arg("dns1");
client_dns2 = server.arg("dns2");
preferences.putString("ip", client_ip);
preferences.putString("gateway", client_gateway);
preferences.putString("subnet", client_subnet);
preferences.putString("dns1", client_dns1);
preferences.putString("dns2", client_dns2);
// Save recipient phone numbers
targetPhoneNumber1 = server.arg("phone1");
targetPhoneNumber2 = server.arg("phone2");
targetPhoneNumber3 = server.arg("phone3");
preferences.putString("phone1", targetPhoneNumber1);
preferences.putString("phone2", targetPhoneNumber2);
preferences.putString("phone3", targetPhoneNumber3);
// Save 10 notification codes
for (int i = 0; i < MAX_CODES; i++) {
allowedCodes[i] = server.arg("code" + String(i));
preferences.putString(("code" + String(i)).c_str(), allowedCodes[i]);
}
// End preferences, committing changes
preferences.end();
// HTML response after saving
String html = "<!DOCTYPE html><html><head><title>Saved</title><style>"
"body{font-family:Arial,sans-serif;text-align:center;padding-top:50px;}"
"h1{color:#4CAF50;}"
"</style></head><body>"
"<h1>Pengaturan Disimpan!</h1>"
"<p>Perangkat akan restart dalam 2 detik...</p>"
"</body></html>";
server.send(200, "text/html", html);
delay(2000); // Wait 2 seconds before restarting
ESP.restart(); // Restart the ESP32 to apply new settings
}
// Handle incoming notifications
void handleNotif() {
// Check if the 'src' argument is present in the request
if (server.hasArg("src")) {
String receivedCode = server.arg("src");
Serial.println("Notification received: " + receivedCode);
lastNotification = receivedCode; // Update the last notification status
bool isValid = false;
// Check if the received code is in the allowed list
for (int i = 0; i < MAX_CODES; i++) {
// Ensure the allowed code is not empty before comparing
if (allowedCodes[i] != "" && receivedCode == allowedCodes[i]) {
isValid = true;
break; // Code found, no need to check further
}
}
if (isValid) {
Serial.println("Valid code. Triggering action...");
server.send(200, "text/plain", "OK. Notification received.");
// --- PLACE YOUR ACTION HERE ---
// Example: Send SMS using SIM800L
// sendSMS(receivedCode); // This function will now send to all configured numbers
// ------------------------------------
} else {
Serial.println("Invalid code.");
server.send(401, "text/plain", "Unauthorized. Code not in allowed list.");
}
} else {
// If 'src' parameter is missing
server.send(400, "text/plain", "Bad Request. 'src' parameter missing.");
}
}
// --- Setup and Loop Functions ---
// Load settings from NVS
void loadSettings() {
preferences.begin("config", true); // Open NVS in read-only mode
client_ssid = preferences.getString("ssid", "Dara@home"); // Load SSID, with default
client_pass = preferences.getString("password", "rejeki88"); // Load password, with default
web_port = preferences.getInt("web_port", 80); // Load web port, default to 80
// Load static IP settings
client_ip = preferences.getString("ip", "");
client_gateway = preferences.getString("gateway", "");
client_subnet = preferences.getString("subnet", "");
client_dns1 = preferences.getString("dns1", "");
client_dns2 = preferences.getString("dns2", "");
// Load recipient phone numbers
targetPhoneNumber1 = preferences.getString("phone1", "");
targetPhoneNumber2 = preferences.getString("phone2", "");
targetPhoneNumber3 = preferences.getString("phone3", "");
// Load 10 notification codes, with default messages for the first few
for (int i = 0; i < MAX_CODES; i++) {
String default_msg = "";
if (i == 0) default_msg = "UPS1 MATI";
if (i == 1) default_msg = "UPS2 MATI";
if (i == 2) default_msg = "PLN MATI";
if (i == 3) default_msg = "GENSET MATI";
allowedCodes[i] = preferences.getString(("code" + String(i)).c_str(), default_msg);
}
preferences.end(); // Close preferences
}
// Setup WiFi connection (Client or Access Point)
void setupWiFi() {
WiFi.mode(WIFI_STA); // Set WiFi to Station (client) mode
// Check if static IP settings are provided
if (client_ip != "" && client_gateway != "" && client_subnet != "") {
IPAddress ip, gateway, subnet, dns1, dns2;
if (ip.fromString(client_ip) && gateway.fromString(client_gateway) && subnet.fromString(client_subnet)) {
if (client_dns1 != "" && dns1.fromString(client_dns1)) {
if (client_dns2 != "" && dns2.fromString(client_dns2)) {
WiFi.config(ip, gateway, subnet, dns1, dns2); // Use primary and secondary DNS
} else {
WiFi.config(ip, gateway, subnet, dns1); // Use only primary DNS
}
} else {
WiFi.config(ip, gateway, subnet); // Use only IP, Gateway, Subnet
}
Serial.println("Menggunakan IP Statis.");
} else {
Serial.println("IP Statis tidak valid, menggunakan DHCP.");
// Clear invalid static IP settings to fall back to DHCP
client_ip = "";
client_gateway = "";
client_subnet = "";
client_dns1 = "";
client_dns2 = "";
}
} else {
Serial.println("IP Statis tidak dikonfigurasi, menggunakan DHCP.");
}
WiFi.begin(client_ssid.c_str(), client_pass.c_str()); // Attempt to connect to saved WiFi
Serial.print("Connecting to " + client_ssid);
int attempts = 0;
// Wait for connection or timeout (10 seconds)
while (WiFi.status() != WL_CONNECTED && attempts < 20) {
delay(500); // Wait 0.5 seconds
Serial.print(".");
attempts++;
}
if (WiFi.status() == WL_CONNECTED) {
Serial.println("\nConnected!");
ipAddress = WiFi.localIP().toString(); // Get assigned IP address
Serial.println("IP Address: " + ipAddress);
} else {
Serial.println("\nConnection Failed. Activating Access Point Mode.");
WiFi.mode(WIFI_AP); // Switch to Access Point mode
WiFi.softAP(ap_ssid, ap_pass); // Start Access Point
ipAddress = WiFi.softAPIP().toString(); // Get AP IP address
Serial.println("AP SSID: " + String(ap_ssid));
Serial.println("AP IP Address: " + ipAddress);
}
}
// Arduino setup function (runs once)
void setup() {
Serial.begin(115200); // Initialize serial communication
Serial.println("\nStarting ESP32 Receiver...");
// Initialize SIM800L (uncomment if used)
// sim800l.begin(9600);
loadSettings(); // Load saved settings from NVS
setupWiFi(); // Setup WiFi connection
// Register web server handlers for different URLs
server.on("/", HTTP_GET, handleRoot); // Root path for configuration page
server.on("/save", HTTP_POST, handleSave); // Save configuration
server.on("/notif", HTTP_GET, handleNotif); // Notification endpoint
server.begin(web_port); // Start the web server on the configured port
Serial.println("Web Server started on port: " + String(web_port));
}
// Arduino loop function (runs repeatedly)
void loop() {
server.handleClient(); // Must be called to handle incoming web requests
}
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