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KodeProgramArduino/final.ino

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+#include <ESP8266WiFi.h>
+#include <ESP8266HTTPClient.h>
+#include <WiFiClientSecure.h>
+#include <Arduino_JSON.h>
+#include <NTPClient.h>
+#include <WiFiManager.h>
+#include <WiFiUdp.h>
+#include <EEPROM.h> // Tambahkan library EEPROM
+
+const char* serverName = "https://touchlight.000webhostapp.com/esp-outputs-action.php?action=outputs_state&board=2";
+
+const long interval = 5000; // Interval waktu pembaruan diatur menjadi 5 detik
+unsigned long previousMillis = 0;
+
+String outputsState;
+
+// Mendefinisikan NTP Client untuk mendapatkan waktu
+WiFiUDP ntpUDP;
+NTPClient timeClient(ntpUDP, "pool.ntp.org", 7 * 3600, 60000); /* Offset waktu 7 jam untuk WIB (GMT+7) */
+
+// Menyimpan status output terakhir di EEPROM
+int lastOutputStates[4]; // Asumsikan keluaran 4 pin
+void loadEEPROM() {
+  for (int i = 0; i < 4; i++) {
+    lastOutputStates[i] = EEPROM.read(i);
+  }
+}
+
+void saveEEPROM() {
+  for (int i = 0; i < 4; i++) {
+    EEPROM.write(i, lastOutputStates[i]);
+  }
+}
+
+void setup() {
+  Serial.begin(115200);
+
+  WiFiManager wifiManager;
+  wifiManager.autoConnect("AutoConnectAP"); // Nama default dari AP
+
+  Serial.println("Terhubung ke jaringan WiFi dengan Alamat IP:");
+  Serial.println(WiFi.localIP());
+
+  // Menginisialisasi klien NTP
+  timeClient.begin();
+
+  // Memuat status output terakhir dari EEPROM
+  loadEEPROM();
+}
+
+void loop() {
+  unsigned long currentMillis = millis();
+
+  if (currentMillis - previousMillis >= interval) {
+    previousMillis = currentMillis; // Memastikan baris ini selalu diperbarui
+
+    // Mendefinisikan variabel untuk menyimpan status relay saat ini
+    int currentRelayState[4];
+    for (int i = 0; i < 4; i++) {
+      currentRelayState[i] = lastOutputStates[i]; // Inisialisasi dengan nilai terakhir
+    }
+
+    // Memeriksa status koneksi WiFi
+    if (WiFi.status() == WL_CONNECTED) {
+      timeClient.update(); // Memperbarui NTP client
+      outputsState = httpGETRequest(serverName);
+      Serial.println(outputsState);
+
+      JSONVar myObject = JSON.parse(outputsState);
+
+      // JSON.typeof(jsonVar) dapat digunakan untuk mendapatkan tipe variabel
+      if (JSON.typeof(myObject) == "undefined") {
+        Serial.println("Parsing input failed!");
+        return;
+      }
+
+      Serial.print("JSON object = ");
+      Serial.println(myObject);
+
+      // myObject.keys() dapat digunakan untuk mendapatkan array dari semua kunci dalam objek
+      JSONVar keys = myObject.keys();
+
+      for (int i = 0; i < keys.length(); i++) {
+        JSONVar value = myObject[keys[i]];
+        int gpioPin = atoi(keys[i]);
+        int gpioState = atoi(value);
+
+        pinMode(gpioPin, OUTPUT);
+        digitalWrite(gpioPin, gpioState);
+        currentRelayState[i] = gpioState; // Perbarui currentRelayState
+
+        // Menyimpan status output terbaru ke EEPROM
+        lastOutputStates[i] = gpioState;
+        saveEEPROM();
+
+        printGPIOStatus(gpioPin, gpioState);
+      }
+    } else {
+      Serial.println("WiFi Disconnected");
+
+      delay(50);
+
+      // Pertahankan status relay menggunakan currentRelayState
+      for (int i = 0; i < 4; i++) {
+        pinMode(i, OUTPUT);
+        digitalWrite(i, currentRelayState[i]);
+        printGPIOStatus(i, currentRelayState[i]);
+      }
+    }
+  }
+}
+
+String httpGETRequest(const char* serverName) {
+  WiFiClientSecure *client = new WiFiClientSecure;
+
+  // Mengatur client yang aman tanpa sertifikat
+  client->setInsecure();
+  HTTPClient https;
+
+  // Alamat IP atau nama domain dengan path URL
+  https.begin(*client, serverName);
+
+  // Mengirimkan permintaan HTTP GET
+  int httpResponseCode = https.GET();
+
+  String payload = "{}";
+
+  if (httpResponseCode > 0) {
+    Serial.print("HTTP Response code: ");
+    Serial.println(httpResponseCode); 
+    payload = https.getString(); 
+  } else { 
+    Serial.print("Error code: "); 
+    Serial.println(httpResponseCode); 
+  } 
+  // Membebaskan sumber daya 
+  https.end(); 
+  delete client; // Membebaskan memori client 
+ 
+  return payload; 
+} 
+ 
+void printGPIOStatus(int gpio, int state) { 
+  // Mendapatkan waktu saat ini 
+  String formattedTime = timeClient.getFormattedTime(); 
+   
+  Serial.print("Time: "); 
+  Serial.print(formattedTime); 
+  Serial.print(" - GPIO "); 
+  Serial.print(gpio); 
+  Serial.print(" set to : "); 
+  Serial.println(state); 
+}