From 41d7972301d58d7ee4aac13d0f4c73ad1b02ae77 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hatvani=20Tam=C3=A1s?= <hatvanitamas09@gmail.com>
Date: Thu, 6 Feb 2025 15:12:50 +0100
Subject: [PATCH] added nfc module to wake pc

---
 IrSendRecv.ino | 100 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 99 insertions(+), 1 deletion(-)

diff --git a/IrSendRecv.ino b/IrSendRecv.ino
index 1641f15..3b5ab77 100644
--- a/IrSendRecv.ino
+++ b/IrSendRecv.ino
@@ -5,6 +5,12 @@
 #include <IRremote.hpp>
 #include <time.h>
 
+#include <Wire.h>
+#include <Adafruit_PN532.h>
+
+#include <WiFiUdp.h>
+#include <WakeOnLan.h>
+
 const char* ssid PROGMEM = "paradicsom";
 const char* password PROGMEM = "19700318";
 
@@ -13,6 +19,8 @@ const char* githubFileURL PROGMEM = "https://raw.githubusercontent.com/htamas121
 const String githubToken PROGMEM = "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";
 String gitwebpage = "";
 
+const char* wakeUrl PROGMEM = "http://192.168.50.69:5000/wake";
+
 const char* ntpServer PROGMEM = "hu.pool.ntp.org";
 const long gmtOffset_sec PROGMEM = 3600;
 const int daylightOffset PROGMEM = 3600;
@@ -23,6 +31,9 @@ const unsigned long interval PROGMEM = 5 * 60;
 WebServer server(80);
 HTTPClient httpClient;
 
+WiFiUDP UDP;
+WakeOnLan WOL(UDP);
+
 //#define DECODE_NEC  // Includes Apple and Onkyo. To enable all protocols , just comment/disable this line.
 #define NEC_PROTOCOL 8
 
@@ -33,12 +44,39 @@ HTTPClient httpClient;
 #define DELAY_AFTER_SEND 1000
 #define DELAY_AFTER_LOOP 5000
 
+#define SDA A4
+#define SCL A5
+
+Adafruit_PN532 nfc(SDA, SCL);
+
+// Known NFC card UID (replace with your specific card UID)
+const uint8_t knownUID[] PROGMEM = { 0x23, 0xD8, 0x4F, 0x15 };  // Replace with your card UID
+const int uidLength PROGMEM = sizeof(knownUID) / sizeof(knownUID[0]);
+
 void setup() {
+  Serial.flush();
+  delay(2000);
   Serial.begin(115200);
 
   pinMode(LED, OUTPUT);
   digitalWrite(LED, HIGH);
 
+  //nfc
+  Serial.println("Initializing nfc board...");
+  nfc.begin();
+  uint32_t versionData = nfc.getFirmwareVersion();
+
+  if(!versionData){
+    Serial.println("Did not find pn532 compatible board!");
+    while(true){
+      Serial.print(".");
+    }
+  }
+
+  nfc.SAMConfig();
+  Serial.println("NFC is initialized");
+
+  //wifi
   WiFi.begin(ssid, password);
   Serial.println("connecting to wifi");
 
@@ -98,6 +136,20 @@ void setup() {
 }
 
 void loop() {
+  //check every time if wifi is active
+  if(!WiFi.isConnected()) {
+    WiFi.disconnect();
+    WiFi.begin(ssid, password);
+
+    Serial.print("Reconnecting to wifi");
+    while (WiFi.status() != WL_CONNECTED) {
+      delay(250);
+      Serial.print(".");
+    }
+
+    Serial.println("\n\n");
+  }
+
   //calculates time to run webpage pull function
   time_t now = time(NULL);
   if(now - lastRunTime >= interval){
@@ -106,6 +158,46 @@ void loop() {
     printTime();
   }
 
+  //nfc
+  uint8_t success;
+  uint8_t uid[7];   // Buffer to hold the UID
+  uint8_t uidLength; // Length of the UID
+
+  // Look for an NFC card
+  Serial.println("Waiting for an NFC card...");
+  success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength);
+
+  if (success) {
+    Serial.println("NFC Card detected!");
+    Serial.print("UID Length: "); Serial.println(uidLength);
+    Serial.print("UID Value: ");
+    for (uint8_t i = 0; i < uidLength; i++) {
+      Serial.print(" 0x"); Serial.print(uid[i], HEX);
+    }
+    Serial.println();
+
+    // Check if the detected card matches the known UID
+    if (uidLength == sizeof(knownUID) && memcmp(uid, knownUID, uidLength) == 0) {
+      Serial.println("Known NFC card detected! Sending HTTP request...");
+
+      /*httpClient.begin(wakeUrl);
+      int httpResponseCode = httpClient.GET();
+      if (httpResponseCode > 0) {
+        Serial.printf("HTTP Response Code: %d\n", httpResponseCode);
+      } else {
+        Serial.printf("Error sending HTTP request: %s\n", httpClient.errorToString(httpResponseCode).c_str());
+      }
+      httpClient.end();*/
+
+      wakePc();
+    } else {
+      Serial.println("Unknown NFC card.");
+    }
+
+    delay(2000); // Debounce delay
+  }
+  //nfc end
+
   server.handleClient();  // Handle incoming client requests
 }
 
@@ -130,7 +222,7 @@ void pullWebpageData(){
   if(httpResponse > 0){
     gitwebpage = httpClient.getString();
     Serial.println("File content: ");
-    Serial.println(gitwebpage);
+    //Serial.println(gitwebpage);
     Serial.println("Pulled web data");
   }else{
     Serial.printf("Error code: %d\n", httpResponse);
@@ -153,4 +245,10 @@ void printTime(){
   } else {
     Serial.println("Failed to obtain time");
   }
+}
+
+void wakePc(){
+  Serial.println("waking pc");
+  const char* MacAddress PROGMEM = "70:85:C2:94:14:33";
+  WOL.sendMagicPacket(MacAddress);
 }
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