libs/RFID.MFRC522
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Merge pull request #105 from Rotzbua/master

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add Troubleshooting to README
This commit is contained in:
Miki Balboa
2015-05-25 01:08:57 -04:00
parent 3eb9be087c 27211e0f23
commit 2c12f1a9ef
2 changed files with 44 additions and 2 deletions
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2
MFRC522.cpp
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@@ -1141,6 +1141,7 @@ byte MFRC522::PCD_MIFARE_Transceive( byte *sendData, ///< Pointer to the data t
/**
* Returns a __FlashStringHelper pointer to a status code name.
*
* @return const __FlashStringHelper *
*/
const __FlashStringHelper *MFRC522::GetStatusCodeName(byte code ///< One of the StatusCode enums.
) {
@@ -1194,6 +1195,7 @@ byte MFRC522::PICC_GetType(byte sak ///< The SAK byte returned from PICC_Select
/**
* Returns a __FlashStringHelper pointer to the PICC type name.
*
* @return const __FlashStringHelper *
*/
const __FlashStringHelper *MFRC522::PICC_GetTypeName(byte piccType ///< One of the PICC_Type enums.
) {

44
README.rst
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@@ -85,12 +85,52 @@ Protocols
* 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"*.
* 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of the final draft (which might be outdated in some areas).
* The reader do not support ISO/IEC 14443-3 Type B.
Troubleshooting
-------
* **I don't get input from reader** or **WARNING: Communication failure, is the MFRC522 properly connected?**
#. Check your connection, see `Pin Layout`_ .
#. Check voltage. Most breakouts work with 3.3V.
#. 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.**
#. Try other site of the antenna.
#. Try to decrease distance between MFRC522.
#. Increase antenna gain per firmware: ``mfrc522.PCD_SetAntennaGain(mfrc522.RxGain_max);``
#. Use better power supply.
#. Hardware corrupted, most products are from china and sometimes the quality is really low. Contact your seller.
* **My tag/card doesn't work.**
#. Distance between antenna and token too huge (>1cm).
#. You got wrong PICC. Is it really 13.56MGhz? Is it really a Mifare Type A?
#. NFC tokens are not supported. Some may work.
#. Animal marker are not supported. They use other frequency.
#. 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**
#. Card simmulation is not supported.
#. Communication with mobile phones is not supported.
#. Peer to peer communication is not supported.
* **I need more features.**
#. If software: code it and make a pull request.
#. If hardware: buy a more expensive like PN532 (supports NFC and many more, but costs about $15)
License
-------
This is free and unencumbered software released into the public domain.