50 lines
2.3 KiB
Markdown
50 lines
2.3 KiB
Markdown
# micropython-mfrc522
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(Micro)Python class to access the MFRC522 RFID reader
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Sept 20 2019
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Modification to be able to read 7 and 10 BYTES RFID
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P.S. I didn't test the write mode.
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Basic class to access RFID readers of the type [MFRC522](http://www.nxp.com/documents/data_sheet/MFRC522.pdf).
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This is basically a re-write of [this](https://github.com/mxgxw/MFRC522-python) Python port for the MFRC522. I
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tried to strip things down and make them more "pythonic" so the result is small enough to run on
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[Micropython](https://github.com/micropython/micropython) boards. I tried the class so far on the
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[ESP8266](https://github.com/micropython/micropython/tree/master/esp8266) and
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the [WiPy](https://github.com/micropython/micropython/tree/master/cc3200).
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## Usage
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Put the modules ``mfrc522.py``, ``examples/read.py``, ``examples/write.py`` to the root of the flash FS on your board.
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For the ESP8266 there are multiple solutions to do that. E.g. use the
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[WebREPL file transfer](https://github.com/micropython/webrepl), or [mpfshell](https://github.com/wendlers/mpfshell).
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I used the following pins for my setup:
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| Signal | GPIO ESP8266 | GPIO ESP32 | GPIO WiPy | Note |
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| --------- | ------------ | ---------- | -------------- | ------------------------------------ |
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| sck | 0 | 18 | "GP14" | |
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| mosi | 2 | 23 | "GP16" | |
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| miso | 4 | 19 | "GP15" | |
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| rst | 5 | 22 | "GP22" | |
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| cs | 14 | 21 | "GP14" |Labeled SDA on most RFID-RC522 boards |
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Now enter the REPL you could run one of the two exmaples:
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For detecting, authenticating and reading from a card:
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import read
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read.do_read()
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This will wait for a MifareClassic 1k card. As soon the card is detected, it is authenticated, and
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16 bytes are read from address 0x08.
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For detecting, authenticating and writing to a card:
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import write
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write.do_write()
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This will wait for a MifareClassic 1k card. As soon the card is detected, it is authenticated, and
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16 bytes written to address 0x08.
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