Bonjour,

Après avoir fais l'acquisition d'une carte ARDUINO UNO j'ai décidé d'acheter ce module pour pouvoir l'utiliser dans mon entreprise,

Pour la détection des badges, j'utilise ce code:

#include <SoftwareSerial.h>
 
SoftwareSerial SoftSerial(2, 3);
unsigned char buffer[64];       // buffer array for data receive over serial port
int count = 0;                    // counter for buffer array
 
void setup()
{
    SoftSerial.begin(9600);     // the SoftSerial baud rate
    Serial.begin(9600);         // the Serial port of Arduino baud rate.
}
 
void loop()
{
    // if date is coming from software serial port ==> data is coming from SoftSerial shield
    if (SoftSerial.available())              
    {
        while(SoftSerial.available())               // reading data into char array
        {
            buffer[count++] = SoftSerial.read();      // writing data into array
            if(count == 64)break;
        }
        Serial.write(buffer, count);     // if no data transmission ends, write buffer to hardware serial port
        clearBufferArray();             // call clearBufferArray function to clear the stored data from the array
        count = 0;                      // set counter of while loop to zero
    }
    if (Serial.available())             // if data is available on hardware serial port ==> data is coming from PC or notebook
    SoftSerial.write(Serial.read());    // write it to the SoftSerial shield
}
void clearBufferArray()                 // function to clear buffer array
{
    // clear all index of array with command NULL
    for (int i=0; i<count; i++)
    {
        buffer[i]=NULL;
    }                  
}

Il marche très bien, maintenant j'ai utilisé un programme pour gérer les identités de ceux qui utilisent les badges, les badges acceptés ou refuser

J'ai essayer celui ci, 

/**
 * RFID Access Control
 *
 * Some of this code was inspired by Tom Igoe's RFID tutorial
 * From the ID-12 example code on the Arduino Playground
 * And HIGHLY based on Jonathan Oxer's project at:
 * http://www.practicalarduino.com/projects/medium/rfid-access-control
 */

// Set up the serial connection to the RFID reader module. In order to
// keep the Arduino TX and RX pins free for communication with a host,
// the sketch uses the SoftwareSerial library to implement serial
// communications on other pins.<
#include <SoftwareSerial.h>

// The RFID module's TX pin needs to be connected to the Arduino.

#define rxPin 4
#define txPin 5

// Create a software serial object for the connection to the RFID module
SoftwareSerial rfid = SoftwareSerial( rxPin, txPin );

// Set up outputs
#define futureOutput 12
#define ledPin 13

// Specify how long the output should be held.
#define unlockSeconds 2

// The tag database consists of two parts. The first part is an array of
// tag values with each tag taking up 5 bytes. The second is a list of
// names with one name for each tag (ie: group of 5 bytes). You can expand
// or shrink this as you see fit. Tags 2 and 3 are only there for example.
char* allowedTags[] = {
"[Entrez led tag]", // Tag 1
"1000312B61", // Tag 2
"060013CBF4", // Tag 3
};

// List of names to associate with the matching tag IDs
char* tagName[] = {
"ENTREZ LES NOMS", // Tag 1
"bill", // Tag 2
"filipe", // Tag 3
};

// Check the number of tags defined
int numberOfTags = sizeof(allowedTags)/sizeof(allowedTags[0]);

int incomingByte = 0; // To store incoming serial data

/**
* Setup
*/
void setup() {
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, LOW);
pinMode(futureOutput, OUTPUT);
digitalWrite(futureOutput, LOW);

Serial.begin(9600); // Serial port for connection to host
rfid.begin(9600); // Serial port for connection to RFID module

Serial.println("RFID Reader Initialized");
}

/**
* Loop
*/
void loop() {
byte i = 0;
byte val = 0;
byte checksum = 0;
byte bytesRead = 0;
byte tempByte = 0;
byte tagBytes[6]; // "Unique" tags are only 5 bytes but we need an extra byte for the checksum
char tagValue[10];

// Read from the RFID module. Because this connection uses SoftwareSerial
// there is no equivalent to the Serial.available() function, so at this
// point the program blocks while waiting for a value from the module
if((val = rfid.read()) == 2) { // Check for header
bytesRead = 0;
while (bytesRead < 12) { // Read 10 digit code + 2 digit checksum
val = rfid.read();

// Append the first 10 bytes (0 to 9) to the raw tag value
if (bytesRead < 10)
{
tagValue[bytesRead] = val;
}

// Check if this is a header or stop byte before the 10 digit reading is complete
if((val == 0x0D)||(val == 0x0A)||(val == 0x03)||(val == 0x02)) {
break; // Stop reading
}

// Ascii/Hex conversion:
if ((val >= '0') && (val <= '9')) {
val = val - '0';
}
else if ((val >= 'A') && (val <= 'F')) {
val = 10 + val - 'A';
}

// Every two hex-digits, add a byte to the code:
if (bytesRead & 1 == 1) {
// Make space for this hex-digit by shifting the previous digit 4 bits to the left
tagBytes[bytesRead >> 1] = (val | (tempByte << 4));

if (bytesRead >> 1 != 5) { // If we're at the checksum byte,
checksum ^= tagBytes[bytesRead >> 1]; // Calculate the checksum... (XOR)
};
} else {
tempByte = val; // Store the first hex digit first
};

bytesRead++; // Ready to read next digit
}

// Send the result to the host connected via USB
if (bytesRead == 12) { // 12 digit read is complete
tagValue[10] = '\0'; // Null-terminate the string

Serial.print("Tag read: ");
for (i=0; i<5; i++) {
// Add a leading 0 to pad out values below 16
if (tagBytes[i] < 16) {
Serial.print("0");
}
Serial.print(tagBytes[i], HEX);
}
Serial.println();

Serial.print("Checksum: ");
Serial.print(tagBytes[5], HEX);
Serial.println(tagBytes[5] == checksum ? " -- passed." : " -- error.");

// Show the raw tag value
Serial.print("VALUE: ");
Serial.println(tagValue);

// Search the tag database for this particular tag
int tagId = findTag( tagValue );

// Only fire the strike plate if this tag was found in the database
if( tagId > 0 )
{
Serial.print("Authorized tag ID ");
Serial.print(tagId);
Serial.print(": unlocking for ");
Serial.println(tagName[tagId - 1]); // Get the name for this tag from the database
unlock(); // Fire the strike plate to open the lock
} else {
Serial.println("Tag not authorized");
}
Serial.println(); // Blank separator line in output
}

bytesRead = 0;
}
}

/**
* Fire the relay to activate the strike plate for the configured
* number of seconds.
*/
void unlock() {
digitalWrite(ledPin, HIGH);
digitalWrite(futureOutput, HIGH);
delay(unlockSeconds * 1000);
digitalWrite(futureOutput, LOW);
digitalWrite(ledPin, LOW);
}

/**
* Search for a specific tag in the database
*/
int findTag( char tagValue[10] ) {
for (int thisCard = 0; thisCard < numberOfTags; thisCard++) {
// Check if the tag value matches this rowgfb in the tag database
if(strcmp(tagValue, allowedTags[thisCard]) == 0)
{
// The row in the database starts at 0, so add 1 to the result so
// that the card ID starts from 1 instead (0 represents "no match")
return(thisCard + 1);
}
}
// If we don't find the tag return a tag ID of 0 to show there was no match
return(0);
} 

Donc voila ce que j'ai en ouvrant le moniteur série 

Le calcul du checksum semble passer mais arduino n'arrive pas a détecter le badges d'ou les caractères bizarres , avez vous une idée?