RFID reader: Rozdiel medzi revíziami
Z SensorWiki
(→Čítačka RFID kariet) |
(→Čítačka RFID kariet) |
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| (2 medziľahlé úpravy od rovnakého používateľa nie sú zobrazené.) | |||
| Riadok 2: | Riadok 2: | ||
== Čítačka RFID kariet == | == Čítačka RFID kariet == | ||
[[Súbor:RFIDreader.jpg|left]] | [[Súbor:RFIDreader.jpg|left]] | ||
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* Čo je to [http://en.wikipedia.org/wiki/Radio-frequency_identification RFID] (wikipedia.org) | * Čo je to [http://en.wikipedia.org/wiki/Radio-frequency_identification RFID] (wikipedia.org) | ||
| Riadok 7: | Riadok 9: | ||
* [http://www.parallax.com/Portals/0/Downloads/docs/prod/audiovis/28140-28340-RFID%20Reader-v2.1.pdf Datasheet] (parallax.com) | * [http://www.parallax.com/Portals/0/Downloads/docs/prod/audiovis/28140-28340-RFID%20Reader-v2.1.pdf Datasheet] (parallax.com) | ||
* [http://www.gumbolabs.org/2009/10/17/parallax-rfid-reader-arduino/ Príklad s vysvetlivkami] (gumolabs.org) | * [http://www.gumbolabs.org/2009/10/17/parallax-rfid-reader-arduino/ Príklad s vysvetlivkami] (gumolabs.org) | ||
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Aby sme sa vyhli zápasu o jediný sériový kanál procesora, pripojíme čítačku | Aby sme sa vyhli zápasu o jediný sériový kanál procesora, pripojíme čítačku | ||
| Riadok 16: | Riadok 20: | ||
Arduino D8 to RFID SOUT | Arduino D8 to RFID SOUT | ||
Arduino GND to RFID GND | Arduino GND to RFID GND | ||
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| + | Example code (modified source from [http://arduino.cc/playground/Learning/PRFID Arduino Playground]): | ||
| + | <source lang="c"> | ||
| + | #include <SoftwareSerial.h> | ||
| + | // Hardware connections | ||
| + | #define ENABLE 11 | ||
| + | #define SOUT rxpin | ||
| + | #define rxPin 8 | ||
| + | #define txPin 9 | ||
| + | // RFID reader SOUT pin connected to Serial RX pin at 2400bps to pin8 | ||
| + | |||
| + | int val = 0; | ||
| + | char code[10]; | ||
| + | int bytesread = 0; | ||
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| + | void setup() | ||
| + | { | ||
| + | Serial.begin(9600); // Hardware serial for Monitor 2400bps | ||
| + | pinMode(ENABLE,OUTPUT); // Set digital pin 2 as OUTPUT to connect it to the RFID /ENABLE pin | ||
| + | digitalWrite(ENABLE, LOW); // Activate the RFID reader | ||
| + | } | ||
| + | |||
| + | void loop() | ||
| + | { | ||
| + | SoftwareSerial RFID = SoftwareSerial(rxPin,txPin); | ||
| + | RFID.begin(2400); | ||
| + | |||
| + | if((val = RFID.read()) == 10) | ||
| + | { // check for header | ||
| + | bytesread = 0; | ||
| + | while(bytesread<10) | ||
| + | { // read 10 digit code | ||
| + | val = RFID.read(); | ||
| + | if((val == 10)||(val == 13)) | ||
| + | { // if header or stop bytes before the 10 digit reading | ||
| + | break; // stop reading | ||
| + | } | ||
| + | code[bytesread] = val; // add the digit | ||
| + | bytesread++; // ready to read next digit | ||
| + | } | ||
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| + | if(bytesread == 10) | ||
| + | { // if 10 digit read is complete | ||
| + | Serial.print("TAG code is: "); // possibly a good TAG | ||
| + | Serial.println(code); // print the TAG code | ||
| + | } | ||
| + | bytesread = 0; | ||
| + | delay(500); // wait for a second | ||
| + | } | ||
| + | } | ||
| + | |||
| + | </source> | ||
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| + | [[Súbor:RFIDscreenshot.png]] | ||
Aktuálna revízia z 07:16, 3. október 2012
Čítačka RFID kariet
- Čo je to RFID (wikipedia.org)
- Product page (parallax.com)
- Datasheet (parallax.com)
- Príklad s vysvetlivkami (gumolabs.org)
Aby sme sa vyhli zápasu o jediný sériový kanál procesora, pripojíme čítačku na iný pin a využijeme knižnicu SoftwareSerial cez rxPin=8
Popis zapojenia (nie je v konflikte ani s LCDAppMod):
Arduino +5V to RFID Vcc Arduino D9 to RFID /ENABLE Arduino D8 to RFID SOUT Arduino GND to RFID GND
Example code (modified source from Arduino Playground):
#include <SoftwareSerial.h>
// Hardware connections
#define ENABLE 11
#define SOUT rxpin
#define rxPin 8
#define txPin 9
// RFID reader SOUT pin connected to Serial RX pin at 2400bps to pin8
int val = 0;
char code[10];
int bytesread = 0;
void setup()
{
Serial.begin(9600); // Hardware serial for Monitor 2400bps
pinMode(ENABLE,OUTPUT); // Set digital pin 2 as OUTPUT to connect it to the RFID /ENABLE pin
digitalWrite(ENABLE, LOW); // Activate the RFID reader
}
void loop()
{
SoftwareSerial RFID = SoftwareSerial(rxPin,txPin);
RFID.begin(2400);
if((val = RFID.read()) == 10)
{ // check for header
bytesread = 0;
while(bytesread<10)
{ // read 10 digit code
val = RFID.read();
if((val == 10)||(val == 13))
{ // if header or stop bytes before the 10 digit reading
break; // stop reading
}
code[bytesread] = val; // add the digit
bytesread++; // ready to read next digit
}
if(bytesread == 10)
{ // if 10 digit read is complete
Serial.print("TAG code is: "); // possibly a good TAG
Serial.println(code); // print the TAG code
}
bytesread = 0;
delay(500); // wait for a second
}
}
