Im new to Arduinos
Just bought a Sparkfun ID-12 RFID reader and tried hooking it up to the arduino I dont get any response from the leds, also how do i get the serial code returned to me?
led+resistor to pin 10, also had an additional led on pin 13
serial connection to pin 9
ground to pins 1 and 7
+5v to pins 2 and 11
i know my wiring is kinda sloppy but you should get the idea on how im using it.
this is the code im using:
void setup() {
Serial.begin(9600); // connect to the serial port
pinMode(13, OUTPUT); // initialize the digital pin as an output
}
void loop () {
byte i = 0;
byte val = 0;
byte code[6];
byte checksum = 0;
byte bytesread = 0;
byte tempbyte = 0;
if(Serial.available() > 0) {
if((val = Serial.read()) == 2) { // check for header
digitalWrite(13, HIGH); // set the LED on
delay(1000); // wait for a second
digitalWrite(13, LOW); // set the LED off
delay(1000); // wait for a second
bytesread = 0;
while (bytesread < 12) { // read 10 digit code + 2 digit checksum
if( Serial.available() > 0) {
val = Serial.read();
if((val == 0x0D)||(val == 0x0A)||(val == 0x03)||(val == 0x02)) { // if header or stop bytes before the 10 digit reading
break; // stop reading
}
// Do 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 byte to code:
if (bytesread & 1 == 1) {
// make some space for this hex-digit by
// shifting the previous hex-digit with 4 bits to the left:
code[bytesread >> 1] = (val | (tempbyte << 4));
if (bytesread >> 1 != 5) { // If we're at the checksum byte,
checksum ^= code[bytesread >> 1]; // Calculate the checksum... (XOR)
};
} else {
tempbyte = val; // Store the first hex digit first...
};
bytesread++; // ready to read next digit
}
}
// Output to Serial:
if (bytesread == 12) { // if 12 digit read is complete
Serial.print("5-byte code: ");
for (i=0; i<5; i++) {
if (code[i] < 16) Serial.print("0");
Serial.print(code[i], HEX);
Serial.print(" ");
}
Serial.println();
Serial.print("Checksum: ");
Serial.print(code[5], HEX);
Serial.println(code[5] == checksum ? " -- passed." : " -- error.");
Serial.println();
}
bytesread = 0;
}
}
}
