sparkfun RFID Starter Kit, Hook-Up Manual

Page: 8 / 10

"7A005B0FF8D6"
};
// Empty array to hold a freshly scanned tag
char newTag[idLen];
void setup() {
// Starts the hardware and software serial ports
Serial.begin(9600);
rSerial.begin(9600);
// Attaches the servo to the pin
lockServo.attach(servoPin);
// Put servo in locked position
lockServo.write(0);
}
void loop() {
// Counter for the newTag array
int i = 0;
// Variable to hold each byte read from the serial buffer
int readByte;
//
Flag so we know when a tag is over
boolean tag = false;
// This makes sure the whole tag is in the serial buffer bef
ore
// reading, the Arduino can read faster than the ID module c
an deliver!
if (rSerial.available() == tagLen) {
tag = true;
}
if (tag == true) {
while (rSerial.available()) {
// Take each byte out of the serial buffer, one at a tim
e
readByte = rSerial.read();
/* This will skip the first byte (2, STX, start of tex
t) and the last three,
ASCII 13, CR/carriage return, ASCII 10, LF/linefeed, an
d ASCII 3, ETX/end of
text, leaving only the unique part of the tag string. I
t puts the byte into
the first space in the array, then steps ahead one spot
*/
if (readByte != 2 && readByte!= 13 && readByte != 10 &&
readByte != 3) {
newTag[i] = readByte;
i++;
}
// If we see ASCII 3, ETX, the tag is over
if (readByte == 3) {
tag = false;
}
}
}
// don't do anything if the newTag array is full of zeroes
if (strlen(newTag)== 0) {
Page 8 of 10