Making Things Talk

APPENDIX C 413

RFID–to-X10 translator

Language: Arduino

Reads RFID tags and sends X10 messages in response to

the tags.

// include the X10 library files:

#include <x10.h>

#include <x10constants.h>

#define zcPin 9 // the zero crossing detect pin

#define dataPin 8 // the X10 data out pin

#define repeatTimes 1 // how many times to repeat each X10 message

// in an electrically noisy environment, you

// can set this higher.

#define tagLength 10 // each tag ID contains 10 bytes

#define startByte 0x0A // for the ID Innovations reader, use 0x02

#define endByte 0x0D // for the ID Innovations reader, use 0x03

#define dataRate 2400 // for the ID Innovations reader, use 9600

// set up a new x10 library instance:

x10 myHouse = x10(zcPin, dataPin);

char tagID[tagLength]; // array to hold the tag you read

int tagIndex = 0; // counter for number of bytes read

int tagComplete = false; // whether the whole tag's been read

char tagOne[] = "0415AB6FB7"; // put the values for your tags here

char tagTwo[] = "0415AB5DAF";

char lastTag = 0; // value of the last tag read

void setup() {

Serial.begin(dataRate); // begin serial.

// Turn off all lights:

myHouse.write(A, ALL_LIGHTS_OFF,repeatTimes);

}

void loop() {

// read in and parse serial data:

if (Serial.available() > 0) {

readByte(