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correct mistake at README

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Rotzbua
2015-05-19 17:53:45 +02:00
parent c460250b74
commit 27211e0f23
1 changed files with 39 additions and 39 deletions
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78
README.rst
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@@ -47,28 +47,28 @@ There are three hardware components involved:
1. **Micro Controller**: 1. **Micro Controller**:
* An `Arduino`_ or compatible executing the Sketch using this library. * An `Arduino`_ or compatible executing the Sketch using this library.
* Prices vary from USD 7 for clones, to USD 75 for "starter kits" (which * Prices vary from USD 7 for clones, to USD 75 for "starter kits" (which
might be a good choice if this is your first exposure to Arduino; might be a good choice if this is your first exposure to Arduino;
check if such kit already includes the Arduino, Reader, and some Tags). check if such kit already includes the Arduino, Reader, and some Tags).
2. **Proximity Coupling Device (PCD)**: 2. **Proximity Coupling Device (PCD)**:
* The PCD is the actual RFID **Reader** based on `NXP MFRC522`_ Contactless * The PCD is the actual RFID **Reader** based on `NXP MFRC522`_ Contactless
Reader Integrated Circuit). Reader Integrated Circuit).
* Readers can be found on `eBay`_ for around USD 5: search for *"rc522"*. * Readers can be found on `eBay`_ for around USD 5: search for *"rc522"*.
* You can also find them at several web stores, they are often included in * You can also find them at several web stores, they are often included in
*"starter kits"*; so check your favourite electronics provider as well. *"starter kits"*; so check your favourite electronics provider as well.
3. **Proximity Integrated Circuit Card (PICC)**: 3. **Proximity Integrated Circuit Card (PICC)**:
* The PICC is the RFID **Card** or **Tag** using the `ISO/IEC 14443A`_ * The PICC is the RFID **Card** or **Tag** using the `ISO/IEC 14443A`_
interface, for example Mifare or NTAG203. interface, for example Mifare or NTAG203.
* One or two might be included with the Reader or *"starter kit"* already. * One or two might be included with the Reader or *"starter kit"* already.
Protocols Protocols
@@ -76,20 +76,20 @@ Protocols
1. The micro controller and the reader use SPI for communication. 1. The micro controller and the reader use SPI for communication.
* The protocol is described in the `NXP MFRC522`_ datasheet. * The protocol is described in the `NXP MFRC522`_ datasheet.
* See the `Pin Layout`_ section for details on connecting the pins. * See the `Pin Layout`_ section for details on connecting the pins.
2. The reader and the tags communicate using a 13.56 MHz electromagnetic field. 2. The reader and the tags communicate using a 13.56 MHz electromagnetic field.
* The protocol is defined in ISO/IEC 14443-3:2011 Part 3 Type A. * The protocol is defined in ISO/IEC 14443-3:2011 Part 3 Type A.
* Details are found in chapter 6 *"Type A – Initialization and anticollision"*. * Details are found in chapter 6 *"Type A – Initialization and anticollision"*.
* See http://wg8.de/wg8n1496_17n3613_Ballot_FCD14443-3.pdf for a free version * See http://wg8.de/wg8n1496_17n3613_Ballot_FCD14443-3.pdf for a free version
of the final draft (which might be outdated in some areas). of the final draft (which might be outdated in some areas).
* The reader do not support ISO/IEC 14443-3 Type B. * The reader do not support ISO/IEC 14443-3 Type B.
Troubleshooting Troubleshooting
@@ -97,38 +97,38 @@ Troubleshooting
* **I don't get input from reader** or **WARNING: Communication failure, is the MFRC522 properly connected?** * **I don't get input from reader** or **WARNING: Communication failure, is the MFRC522 properly connected?**
1. Check your connection, see `Pin Layout`_ . #. Check your connection, see `Pin Layout`_ .
2. Check voltage. Most breakouts work with 3.3V. #. Check voltage. Most breakouts work with 3.3V.
3. The SPI only works with 3.3V, most breakouts seems 5V tollerant, but try a level shifter. #. The SPI only works with 3.3V, most breakouts seems 5V tollerant, but try a level shifter.
* **Sometimes I get timeouts** or **tag/card sometimes not work.** * **Sometimes I get timeouts** or **tag/card sometimes not work.**
1. Try other site of the antenna. #. Try other site of the antenna.
2. Try to decrease distance between MFRC522. #. Try to decrease distance between MFRC522.
3. Increase antenna gain per firmware: ``mfrc522.PCD_SetAntennaGain(mfrc522.RxGain_max);`` #. Increase antenna gain per firmware: ``mfrc522.PCD_SetAntennaGain(mfrc522.RxGain_max);``
4. Use better power supply. #. Use better power supply.
5. Hardware corrupted, most products are from china and sometimes the quality is really low. Contact your seller. #. Hardware corrupted, most products are from china and sometimes the quality is really low. Contact your seller.
* **My tag/card doesn't work.** * **My tag/card doesn't work.**
1. Distance between antenna and token too huge (>1cm). #. Distance between antenna and token too huge (>1cm).
2. You got wrong PICC. Is it really 13.56MGhz? Is it really a Mifare Type A? #. You got wrong PICC. Is it really 13.56MGhz? Is it really a Mifare Type A?
3. NFC tokens are not supported. Some may work. #. NFC tokens are not supported. Some may work.
4. Animal marker are not supported. They use other frequency. #. Animal marker are not supported. They use other frequency.
5. Hardware corrupted, most products are from china and sometimes the quality is really low. Contact your seller. #. Hardware corrupted, most products are from china and sometimes the quality is really low. Contact your seller.
* **My mobile phone doesn't recognize the MFRC522** or **my MFRC522 can't read data from other MFRC522** * **My mobile phone doesn't recognize the MFRC522** or **my MFRC522 can't read data from other MFRC522**
1. Card simmulation is not supported. #. Card simmulation is not supported.
2. Communication with mobile phones is not supported. #. Communication with mobile phones is not supported.
3. Peer to peer communication is not supported. #. Peer to peer communication is not supported.
* **I need more features.** * **I need more features.**
1. If software: code it and make a pull request. #. If software: code it and make a pull request.
2. If hardware: buy a more expensive like PN532 (supports NFC and many more, but costs about $15) #. If hardware: buy a more expensive like PN532 (supports NFC and many more, but costs about $15)
License License