sparkfun RFID Starter Kit, Hook-Up Manual

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/*****************************
RFID ­ powered lockbox
This sketch will move a servo when
a trusted tag is read with the
ID ­ 12/ID ­ 20 RFID module
Pinout for SparkFun RFID USB Reader
Arduino ­­­­­ RFID module
5V VCC
GND GND
D2 TX
Pinout for SparkFun RFID Breakout Board
Arduino ­­­­­ RFID module
5V VCC
GND GND
D2
D0
Connect the servo's power, ground, and
signal pins to VCC, GND,
and Arduino D9
If using the breakout, you can also
put an LED & 330 ohm resistor between
the RFID module's READ pin and GND for
a "card successfully read" indication
by acavis, 3/31/2015
Inspired by & partially adapted from
http://bildr.org/2011/02/rfid ­ arduino/
******************************/
#include <SoftwareSerial.h>
#include <Servo.h>
// Choose two pins for SoftwareSerial
SoftwareSerial rSerial(2, 3); // RX, TX
// Make a servo object
Servo lockServo;
// Pick a PWM pin to put the servo on
const int servoPin = 9;
// For SparkFun's tags, we will receive 16 bytes on every
// tag read, but throw four away. The 13th space will always
// be 0, since proper strings in Arduino end with 0
// These constants hold the total tag length (tagLen) and
// the length of the part we want to keep (idLen),
// plus the total number of tags we want to check against (kTa
gs)
const int tagLen
= 16;
const int idLen = 13;
const int kTags = 4;
// Put your known tags here!
char knownTags[kTags][idLen] = {
"111111111111",
"444444444444",
"555555555555",
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