RFID id-12 tagreader

Here is a simple code for reading tags from the id12 RFID reader. It should be quite easy to modify if you know the dataformat your reader is sending out.

Here is how to hook it up for serial communications, either using a microcontroller like arduino or wiring, or through a serial to usb interface, or wirelessly over bluetooth, using a bluetooth module like bluesmirf:

ID-12 schematics, originally uploaded by hc gilje.

(This schematic has been updated with a 1k resistor between pin 10 and LED after reports by users)

If you are using the breakout board from sparkfun, the pinout is as seen in the image below.
Connect the led+resistor to pin 10, serial connection to pin 9, ground to pins 1 and 7, +5v to pins 2 and 11 (updated june 26th, 2008 )

If you use an arduino or wiring board here is the code to read (from RFID reader) and write (to your computer) the serial port (modified from Tom Igoe´s code):
/* RFID ID12
*/

char val = 0; // variable to store the data from the serial port

void setup() {
Serial.begin(9600); // connect to the serial port
}

void loop () {
// read the serial port

if(Serial.available() > 0) {
val = Serial.read();
Serial.print(val, BYTE);

}
}

Maxmsp code:

copy and paste into maxmsp. You might want to clear the menu before adding your own tags:

#P window setfont “Sans Serif” 18.;
#P number 549 297 35 18 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
#P window setfont “Sans Serif” 9.;
#P window linecount 1;
#P comment 206 361 121 196617 filter out the 10 data bits;
#P newex 457 289 49 196617 delay 10;
#P newex 144 417 80 196617 prepend symbol;
#P message 550 178 33 196617 clear;
#P newex 508 432 69 196617 route symbol;
#P newex 508 459 78 196617 prepend append;
#P newex 508 409 41 196617 v temp;
#P newex 457 343 32 196617 sel 0;
#P newex 457 320 27 196617 0;
#P newex 525 261 21 196617 t 1;
#P newex 508 198 40 196617 t s b 0;
#P user ubumenu 550 224 100 196617 0 1 1 0;
#X add 0D003B363E;
#X add 0E002A0E4D;
#X add 0E002A393C;
#X add 0E002A0148;
#X add 0E002A047E;
#X add 0E002A0A2E;
#X prefix_set 0 0 <none> 0;
#P newex 144 391 40 196617 itoa;
#P newex 144 360 57 196617 zl slice 10;
#P newex 103 319 51 196617 zl slice 1;
#P newex 103 293 54 196617 thresh 40;
#P toggle 103 187 15 0;
#P number 145 186 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
#P newex 103 210 52 196617 metro 20;
#P button 85 215 15 0;
#P newex 103 254 98 196617 serial b 9600 8 1 0;
#P comment 158 321 100 196617 filter out start bit;
#P window linecount 2;
#P comment 520 113 156 196617 checks if tag is already in list \, if not adds it. if yes shows the id;
#P window linecount 1;
#P comment 281 65 80 196617 RFID tag reader;
#P comment 587 177 100 196617 clear taglist;
#P window linecount 2;
#P comment 173 212 100 196617 how often the serial port is checked;
#P connect 9 0 7 0;
#P fasten 6 0 5 0 90 240 108 240;
#P connect 7 0 5 0;
#P connect 5 0 10 0;
#P connect 10 0 11 0;
#P connect 11 1 12 0;
#P connect 12 0 13 0;
#P connect 13 0 23 0;
#P connect 8 0 7 1;
#P connect 15 1 24 0;
#P connect 24 0 17 0;
#P connect 17 0 18 0;
#P connect 15 2 17 1;
#P connect 16 0 17 1;
#P connect 23 0 15 0;
#P connect 15 0 19 0;
#P connect 18 0 19 0;
#P connect 19 0 21 0;
#P connect 21 0 20 0;
#P connect 14 0 16 0;
#P connect 14 0 26 0;
#P connect 15 0 14 0;
#P connect 22 0 14 0;
#P connect 20 0 14 0;
#P window clipboard copycount 27;

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