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iotkk_ver9.ino

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+#include <ESP8266WebServer.h>
+#include <ESP8266HTTPClient.h>
+#include <SPI.h>
+#include <MFRC522.h>
+#include <Wire.h>
+#include <LiquidCrystal_I2C.h>
+
+#define SS_PIN D2  // SDA / SS is connected to pinout D2
+#define RST_PIN D1  // RST is connected to pinout D1
+MFRC522 mfrc522(SS_PIN, RST_PIN);  // Create MFRC522 instance.
+
+#define ON_Board_LED 2  
+#define BUZZER_PIN D8  // Define the pin for the buzzer
+
+const char* ssid = ":)";
+const char* password = "hanadulset";
+
+ESP8266WebServer server(80);  // Server on port 80
+
+int readsuccess;
+byte readcard[4];
+char str[32] = "";
+String StrUID;
+String receivedData = "";
+String newBalance = "";
+
+// Set the LCD address to 0x27 for a 16 chars and 2 line display
+LiquidCrystal_I2C lcd(0x27, 16, 2);
+
+void setup() {
+  Wire.begin(D3, D4);
+  Serial.begin(115200); // Initialize serial communications with the PC
+  SPI.begin();  // Init SPI bus
+  mfrc522.PCD_Init(); // Init MFRC522 card
+
+  delay(500);
+
+  // Initialize the LCD
+  lcd.begin(16, 2);
+  lcd.clear();
+  lcd.backlight();
+
+  WiFi.begin(ssid, password); // Connect to your WiFi router
+  Serial.println("");
+
+  pinMode(ON_Board_LED, OUTPUT);
+  pinMode(BUZZER_PIN, OUTPUT);  // Set buzzer pin as output
+  digitalWrite(ON_Board_LED, HIGH); // Turn off Led On Board
+  digitalWrite(BUZZER_PIN, LOW);  // Ensure the buzzer is off initially
+
+  Serial.print("Connecting");
+  while (WiFi.status() != WL_CONNECTED) {
+    Serial.print(".");
+    digitalWrite(ON_Board_LED, LOW);
+    delay(250);
+    digitalWrite(ON_Board_LED, HIGH);
+    delay(250);
+  }
+  digitalWrite(ON_Board_LED, HIGH); // Turn off the On Board LED when it is connected to the wifi router.
+  Serial.println("");
+  Serial.print("Successfully connected to : ");
+  Serial.println(ssid);
+  Serial.print("IP address: ");
+  Serial.println(WiFi.localIP());
+
+  // Setup server routes
+  server.on("/", HTTP_GET, handleRoot);
+  server.begin();
+
+  Serial.println("Please tag a card or keychain to see the UID !");
+  Serial.println("");
+}
+
+
+void loop() {
+  // Handle client requests
+  server.handleClient();
+
+  // Read RFID card
+  readsuccess = getid();
+
+  if (readsuccess) {
+    digitalWrite(ON_Board_LED, LOW);
+    digitalWrite(BUZZER_PIN, HIGH) ; //DO note 523 Hz
+    delay (250);  // Turn on the buzzer
+    digitalWrite(BUZZER_PIN, LOW) ;
+
+    HTTPClient http;  // Declare object of class HTTPClient
+    WiFiClient client;
+
+    String UIDresultSend = StrUID;
+    String postData = "UIDresult=" + UIDresultSend;
+
+    http.begin(client, "http://bersyukur.cloud/IOTKK/getUID.php");
+    http.addHeader("Content-Type", "application/x-www-form-urlencoded"); // Specify content-type header
+
+    int httpCode = http.POST(postData);  // Send the request
+    String payload = http.getString();  // Get the response payload
+
+    Serial.println(UIDresultSend);
+    Serial.println(httpCode);  // Print HTTP return code
+    Serial.println(payload);  // Print request response payload
+
+    receivedData = payload;  // Store received data
+
+    http.end();  // Close connection
+    
+    // Make a GET request to receive new balance data
+    if (WiFi.status() == WL_CONNECTED) {
+      http.begin(client, "http://bersyukur.cloud/IOTKK/sendNewBalance.php");
+      int httpCode = http.GET();
+      Serial.println("HTTP GET code: " + String(httpCode));  // Print HTTP return code
+      if (httpCode > 0) {
+        if (httpCode == HTTP_CODE_OK) {
+          newBalance = http.getString();
+          String balance = newBalance;
+          Serial.println("New balance received: " + newBalance);
+
+          // Display the new balance on the LCD with scrolling
+          scrollText(balance);
+        } else {
+          Serial.println("Failed to get new balance, response code: " + String(httpCode));
+        }
+      } else {
+        Serial.printf("[HTTP] GET request failed, error: %s\n", http.errorToString(httpCode).c_str());
+      }
+      http.end();
+    } else {
+      Serial.println("WiFi not connected");
+    }
+
+    delay(250);
+    digitalWrite(BUZZER_PIN, LOW);  // Turn off the buzzer
+    digitalWrite(ON_Board_LED, HIGH);
+
+  }
+}
+
+int getid() {
+  if (!mfrc522.PICC_IsNewCardPresent()) {
+    return 0;
+  }
+  if (!mfrc522.PICC_ReadCardSerial()) {
+    return 0;
+  }
+
+  Serial.print("THE UID OF THE SCANNED CARD IS : ");
+
+  for (int i = 0; i < 4; i++) {
+    readcard[i] = mfrc522.uid.uidByte[i];  // Storing the UID of the tag in readcard
+    array_to_string(readcard, 4, str);
+    StrUID = str;
+  }
+  mfrc522.PICC_HaltA();
+  return 1;
+}
+
+void array_to_string(byte array[], unsigned int len, char buffer[]) {
+  for (unsigned int i = 0; i < len; i++) {
+    byte nib1 = (array[i] >> 4) & 0x0F;
+    byte nib2 = (array[i] >> 0) & 0x0F;
+    buffer[i * 2 + 0] = nib1 < 0xA ? '0' + nib1 : 'A' + nib1 - 0xA;
+    buffer[i * 2 + 1] = nib2 < 0xA ? '0' + nib2 : 'A' + nib2 - 0xA;
+  }
+  buffer[len * 2] = '\0';
+}
+
+void handleRoot() {
+  server.send(200, "text/plain", receivedData);
+}
+
+// Function to scroll text on the LCD from right to left
+void scrollText(String message) {
+  message = "                " + message + "                ";  // Add spaces to the start and end for scrolling effect
+  for (int i = 0; i < message.length() - 16; i++) {
+    lcd.clear();
+    lcd.setCursor(0, 0);
+    lcd.print(message.substring(i, i + 16));  // Print a substring of the message
+    delay(200);  // Delay to control the scroll speed
+    lcd.clear();
+  }
+}