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ARDUINO RFID
20.10.2008 | Author: eb| Posted in Arduino
RFID (Radio Frequency Identification is a si!"#e and effecti$e
%ay to trac& andidentify !u#ti"#e unique ob'ects in a s"ace. he
!a'ority of sensor techno#o)ies do not
su""ort trac&in) !u#ti"#e tar)ets* as %ith InfraRed or
+#trasonic sensors. In these
situations* the InfraRed or +#trasonic bea! %i## bounce off the
nearest ob'ect and
disre)ard anythin) behind the!.
,ith RFID* the iso#ation and identification of unique ob'ects is
achie$ed by assi)nin)
a distinct si)nature to each. RFID* a co!!on identification
techno#o)y* can interface
quite easi#y %ith !icrocontro##ers and co!"uters. RFID
net%or&s require that both a
RFID Reader and Passi$e or Acti$e RFID ta)s to function
effecti$e#y. Passi$e ta)s
)et their "o%er fro! the ener)y of the radio %a$e itse#f* as a
resu#t Passi$e RFIDs
on#y %or& o$er short distances. ,hereas* Acti$e ta)s are
"o%ered $ia battery and can%or& o$er #ar)er distances.
he ID Inno$ations ID12 Reader is s#i)ht#y !ore co!"#e- than the
Para##a- RFID*
and o"erates at a faster baud rate /00 b"s. A## the ID
Inno$ations Readers use the
sa!e co!!unication "rotoco#* and one can choose fro! three data
out"ut for!ats
AII* ,ei)and2 or 3a)netic rac&. he ta)s used in
co##aboration %ith the ID12
are 435001 126 &7 ta)s* these ta)s encode the unique ID as
AII he-adeci!a#
$a#ues. herefore* %e %i## o"t for the AII data out"ut
for!at.
he Data 9utPut For!at AII
(AII 02 DAA (10 AII 74; +3 (2 AII R (AII 1
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{
// If we@re at the chec$(u #yte> // !alculate the chec$(u...
540R8 - clu(i)e 0R $'e$su #$ode%b"tesread ++1&
!
!
else{
tepb"te #val
!
// ready to read net diit b"tesread
!
!
// rint i*(b"tesread ##12)
{
Serial.print(5b"te $ode: )
*or(i#0i-5i){
i*($ode%i&-16)Serial.print(0)
Serial.print($ode%i&;)
Serial.print( )
!
Serial.println()
Serial.print(?'e$su: )
Serial.print($ode%5&;)
Serial.println($ode%5#$'e$su @ passed.:
error.)
Serial.println()
!
b"tesread #0
!
!
!
