From 07eaebe7747a85b0441bbd13a6bdf6b6d93b926c Mon Sep 17 00:00:00 2001
From: Eyuep Sueyruege <eyuep.sueyruege@noreply.ais-lab.eu>
Date: Tue, 21 Nov 2023 16:13:43 +0100
Subject: [PATCH] Update src/arduino/card_scanner.ino

---
 src/arduino/card_scanner.ino | 165 +++++++++++++++++++++++++++--------
 1 file changed, 129 insertions(+), 36 deletions(-)

diff --git a/src/arduino/card_scanner.ino b/src/arduino/card_scanner.ino
index b833a24..db4fced 100644
--- a/src/arduino/card_scanner.ino
+++ b/src/arduino/card_scanner.ino
@@ -1,53 +1,146 @@
-// imports
+#include <Arduino.h>
+#include <WiFi.h>
+#include <WiFiMulti.h>
+#include <HTTPClient.h>
 #include <SPI.h>
 #include <MFRC522.h>
 
+#define RST_PIN         22           
+#define SS_PIN          21           
 
-// Pin Definition
-#define SS_PIN 10
-#define RST_PIN 9
+String lastCardName = "";
 
-// Instatiate Motor and RFID Module
+MFRC522 mfrc522(SS_PIN, RST_PIN);  // Create MFRC522 instance
 
-MFRC522 rfid(SS_PIN, RST_PIN); 
+// Define an array of UUIDs
+const char* uuids[] = {
+  "1391d43",
+  "3263784d",
+  "b1fcbd6",
+  "a24aee4b",
+  "b1a37b9",
+  "a21d9c4d",
+  "b1e8316",
+  "929b444d",
+  "f12a5c9",
+  "717f5347",
+  "c1b6af9"
+};
 
-byte nuidPICC[4];
+// Corresponding names for each UUID
+const char* names[] = {
+  "Card1",
+  "Card2",
+  "Card3",
+  "Card4",
+  "Card5",
+  "Card6",
+  "Card7",
+  "Card8",
+  "Card9",
+  "Card10",
+  "Card11"
+};
 
-// Setup for first time
-void setup() { 
-  // Serial Begin
-  Serial.begin(9600);
-  // Init SPI bus
-  SPI.begin(); 
-  // Init MFRC522
-  rfid.PCD_Init();  
+unsigned long lastReadTime = 0;
+unsigned long readInterval = 1000; // Interval between card reading operations in milliseconds
+
+WiFiMulti wifiMulti;
+
+void setup() {
+  Serial.begin(115200);
+  SPI.begin();      // Initiate SPI bus
+  mfrc522.PCD_Init(); // Initiate MFRC522
+
+  Serial.println();
+  Serial.println("Waiting for connection to Wi-Fi...");
+
+  wifiMulti.addAP("SSID", "Password");  // Add your WLAN SSID and password
+
+  while (wifiMulti.run() != WL_CONNECTED) {
+    delay(1000);
+    Serial.println("Connecting to Wi-Fi...");
+  }
+
+  Serial.println("Connected to Wi-Fi!");
 }
 
-// iteration
 void loop() {
-  // Reset the loop if no new card present on the sensor/reader. This saves the entire process when idle.
-  if (!rfid.PICC_IsNewCardPresent()){
-    return;
-  }
-  // Verify if the NUID has been read
-  if (!rfid.PICC_ReadCardSerial()){
-    return;
-  }
-
-    for (byte i = 0; i < 4; i++) {
-      nuidPICC[i] = rfid.uid.uidByte[i];
+  // Check if it's time to read a card
+  if (millis() - lastReadTime > readInterval) {
+    if (readCard()) {
+      sendHttpRequest(lastCardName);
     }
+    lastReadTime = millis();
+  }
+}
 
-  String id = "ID: "+String(nuidPICC[0])+" : "+String(nuidPICC[1])+" : "+String(nuidPICC[2])+" : "+String(nuidPICC[3]);
-   Serial.println(id);
-  
+bool readCard() {
+  // Look for new cards
+  if (!mfrc522.PICC_IsNewCardPresent() || !mfrc522.PICC_ReadCardSerial()) {
+    return false;
+  }
 
+  // Print UID
+  Serial.print("Card read. UID: ");
+  String uidString = "";
+  for (byte i = 0; i < mfrc522.uid.size; ++i) {
+    Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
+    Serial.print(mfrc522.uid.uidByte[i], HEX);
+    uidString += String(mfrc522.uid.uidByte[i], HEX);
+  }
+  Serial.println();
 
-  delay(1000);
+  // Search for the UID in the array and get the corresponding name
+  const char* cardName = getCardName(uidString.c_str());
 
-  // Halt PICC
-  rfid.PICC_HaltA();
+  lastCardName = cardName;
+  Serial.print("Card name: ");
+  Serial.println(cardName);
 
-  // Stop encryption on PCD
-  rfid.PCD_StopCrypto1();
-}
\ No newline at end of file
+  return true;
+}
+
+const char* getCardName(const char* uid) {
+  for (int i = 0; i < sizeof(uuids) / sizeof(uuids[0]); i++) {
+    if (strcmp(uid, uuids[i]) == 0) {
+      return names[i];
+    }
+  }
+  return "Unknown Card";
+}
+
+void sendHttpRequest(String card) {
+  HTTPClient http;
+
+  Serial.println("[HTTP] begin...");
+
+  // Create the URL with the name as a query parameter
+  String serverUrl = "http://IP_Address:3000/result/";
+  String uidString = "";
+  for (byte i = 0; i < mfrc522.uid.size; ++i) {
+    uidString += String(mfrc522.uid.uidByte[i], HEX);
+  }
+  const char* cardName = getCardName(uidString.c_str());
+
+  serverUrl += cardName;
+
+  http.begin(serverUrl);
+
+  Serial.println("[HTTP] GET...");
+
+  int httpCode = http.GET();
+
+  if (httpCode > 0) {
+    Serial.printf("[HTTP] GET... code: %d\n", httpCode);
+
+    if (httpCode == HTTP_CODE_OK) {
+      String payload = http.getString();
+      Serial.println(payload);
+    }
+  } else {
+    Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
+  }
+
+  http.end();
+}