ESP8266 ile RFID kart okuyucu yetkilendirme

Merhabalar esp8266 ile kart okuyucu projem var ama text dosyasına kartın ID lerini düzgün bir şekilde yazmama rağmen kod reject yiyip serial monitörde "NOT AUTHORIZED " yazıyor. Kartların Idsi hiçbir şekilde okunmuyor. Dosyayı esp'ye upload ettim, xampp ile test.txt dosyasına local serverdan ulaşmaya çalıştım ama nafile. Reject olayını nasıl çözebilirim ?

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <MFRC522.h>
#include <SPI.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>

#define RST_PIN 20 // RST-PIN for RC522 - RFID - SPI - Module GPIO15
#define SS_PIN 2 // SDA-PIN for RC522 - RFID - SPI - Module GPIO2
MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance

#define Relay 10
#define BlueLed 15
#define GreenLed 0
#define RedLed 3

//SSD1306 display(0x3c, 4, 5);

#define OLED_RESET D5
/* Object named display, of the class Adafruit_SSD1306 */
Adafruit_SSD1306 display(OLED_RESET);

#if (SSD1306_LCDHEIGHT != 64)
#error("Height incorrect, please fix Adafruit_SSD1306.h!");
#endif


//Wireless name and password
const char* ssid = "******"; // replace with you wireless network name
const char* password = "****"; //replace with you wireless network password

// Remote site information
String host = "****"; // IP address of your local server
String url = "/test.txt"; // folder location of the txt file with the RFID cards identificatio, p.e. "/test.txt" if on the root of the server

int time_buffer = 5000; // amount of time in miliseconds that the relay will remain open

void setup() {
pinMode(Relay, OUTPUT);
digitalWrite(Relay, 0);

//display.init();
//display.flipScreenVertically();
//display.setContrast(255);

display.begin(SSD1306_SWITCHCAPVCC, 0x3C); /* Initialize display with address 0x3C */

Serial.begin(115200); // Initialize serial communications
SPI.begin(); // Init SPI bus
mfrc522.PCD_Init(); // Init MFRC522

// We start by connecting to a WiFi network

Serial.println("Connecting to ");
Serial.println(ssid);

WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
wifi_connected();
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
leds_off();
delay(3000);
}

void leds_off() {
analogWrite(BlueLed, 0); // turn the LED off
analogWrite(GreenLed, 0); // turn the LED off
analogWrite(RedLed, 0); // turn the LED off

//display.clear();
//display.display();

display.clearDisplay(); /* Clear display */
display.display();
}

void reject() {
// Align text vertical/horizontal center

//display.clear();
// display.setTextAlignment(TEXT_ALIGN_CENTER_BOTH);
// display.setFont(ArialMT_Plain_16);
// display.drawString(DISPLAY_WIDTH / 2, 10 + (DISPLAY_HEIGHT / 4), "NOT");
// display.drawString(DISPLAY_WIDTH / 2, 30 + (DISPLAY_HEIGHT / 4), "AUTHORIZED");
// display.display();


display.clearDisplay(); /* Clear display */
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0, 0);
display.println("TEXT GOES HERE");
display.setCursor(0, 30);
display.println("TEXT GOES HERE");
display.setCursor(0, 30);
display.println("TEXT GOES HERE");
display.setCursor(0, 40);
display.println("TEXT GOES HERE");
display.display();

analogWrite(RedLed, 767); // turn the Red LED on
delay(2000);
leds_off();
}
void authorize() {
// Align text vertical/horizontal center
// display.clear();
// display.setTextAlignment(TEXT_ALIGN_CENTER_BOTH);
// display.setFont(ArialMT_Plain_16);
// display.drawString(DISPLAY_WIDTH / 2, DISPLAY_HEIGHT / 2, "AUTHORIZED");
// display.display();

display.clearDisplay(); /* Clear display */
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0, 0);
display.println("AUTHORIZED");
display.setCursor(0, 30);
display.println("AUTHORIZED");
display.setCursor(0, 30);
display.println("AUTHORIZED");
display.setCursor(0, 40);
display.println("AUTHORIZED");
display.display();

analogWrite(GreenLed, 767); // turn the Green LED on
digitalWrite(Relay, 1);
delay(time_buffer); // wait for a second
digitalWrite(Relay, 0);
leds_off();
}

void wifi_connected () {
// Align text vertical/horizontal center
//display.clear();
// display.setTextAlignment(TEXT_ALIGN_CENTER_BOTH);
// display.setFont(ArialMT_Plain_16);
// display.drawString(DISPLAY_WIDTH / 2, 10 + (DISPLAY_HEIGHT / 4), "WI-FI");
// display.drawString(DISPLAY_WIDTH / 2, 20 + (DISPLAY_HEIGHT / 2), "CONNECTED");
// display.display();

display.clearDisplay(); /* Clear display */
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0, 0);
display.println("WIFI CONNECTED");
display.setCursor(0, 30);
display.println("HOST: "+host);
display.setCursor(0, 30);
display.println("DOSYA: ");
display.setCursor(0, 40);
display.println(url);
display.display();
delay(3000);
}

void connection_failed() {
// Align text vertical/horizontal center
// display.clear();
// display.setTextAlignment(TEXT_ALIGN_CENTER_BOTH);
// display.setFont(ArialMT_Plain_16);
// display.drawString(DISPLAY_WIDTH / 2, 10 + (DISPLAY_HEIGHT / 4), "CONNECTION");
// display.drawString(DISPLAY_WIDTH / 2, 20 + (DISPLAY_HEIGHT / 2), "FAILED");
// display.display();

display.clearDisplay(); /* Clear display */
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0, 0);
display.println("FAILED");
display.setCursor(0, 30);
display.println("FAILED");
display.setCursor(0, 30);
display.println("FAILED");
display.setCursor(0, 40);
display.println("FAILED");
display.display();

delay(3000);
leds_off();
}

// Helper routine to dump a byte array as hex values to Serial
void dump_byte_array(byte *buffer, byte bufferSize) {
for (byte i = 0; i < bufferSize; i++) {
Serial.print(buffer[i] < 0x10 ? " 0" : " ");
Serial.print(buffer[i], HEX);
}
}

void loop() {
int authorized_flag = 0;
// Look for new cards
if ( ! mfrc522.PICC_IsNewCardPresent()) {
delay(50);
return;
}
// Select one of the cards
if ( ! mfrc522.PICC_ReadCardSerial()) {
delay(50);
return;
}

////-------------------------------------------------RFID----------------------------------------------

// Shows the card ID on the serial console
String content = "";
for (byte i = 0; i < mfrc522.uid.size; i++)
{
content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
content.concat(String(mfrc522.uid.uidByte[i], HEX));
}
Serial.println();
content.toUpperCase();
Serial.println("Cart read:" + content);

////-------------------------------------------------SERVER----------------------------------------------

// Use WiFiClient class to create TCP connections
WiFiClient client;
const int httpPort = 80;
if (!client.connect(host, httpPort)) {
Serial.println("connection failed");
connection_failed();
return;
}

// This will send the request to the server
client.print(String("GET ") + url + " HTTP/1.1rn" + "Host: " + host + "rn" + "Connection: closernrn");

delay(10);

// Read all the lines of the reply from server and print them to Serial
String line;
while (client.available()) {
line = client.readStringUntil('n');

if (line == content) {
authorized_flag = 1;
}
}

if (authorized_flag == 1) {
Serial.println("AUTHORIZED");
authorize();
}
else {
Serial.println("NOT AUTHORIZED");
reject();
}
}

cok fazla kod var.. o yüzden direk sondan bakmaya basladim..
not authorized demesinin sebebi flag degerinin 1 haricinde bir deger olmasi, hemen üstündeki while döngüsü dikkatimi cekti, tabi client'dan gelen string ne bilmiyorum ama bence o "line" degiskenini yazdirip kontrol etsen o zaman content ile esit olup olmadigini anlarsin belki whitespace karakter yüzünden yapabilir (trim komutu kullanabilirsin mesela).. Kisacasi server ne yolluyor onu bir ögrenip sonra content ile karsilastirman daha mantikli..