RFID RC522 ESP32 MicroPython

RFID RC522 Сканер.

Не забываем залить драйвер. 

 

ESP32 > RC522

GND > GND

3V3 > 3V3

D5 >  SDA

D18 >  SCK

D23 >  MOSI

D19 >  MISO

D4 >  RST 

main.py    

from mfrc522 import MFRC522
from time import sleep_ms


rdr = MFRC522(sck=18, mosi=23, miso=19, rst=4, cs=5)

led = Pin(2, Pin.OUT)

print("Приложите карту")
print_like_console('Put card', x=0, y=0, delay=0.05)

last_uid = None

while True:
    (stat, tag_type) = rdr.request(rdr.REQIDL)
    if stat == rdr.OK:
        (stat, uid) = rdr.anticoll()
        if stat == rdr.OK and uid != last_uid:
            last_uid = uid
            print("Карта найдена")
            print("UID:", uid)
                
                
    else:
        last_uid = None  # сброс если карта убрана
    sleep_ms(200)
    

mfrc522.py      Драйвер

# mfrc522.py – MFRC522 RFID reader for ESP32 MicroPython

from machine import Pin, SPI
from os import uname

class MFRC522:

    OK = 0
    NOTAGERR = 1
    ERR = 2

    REQIDL = 0x26
    REQALL = 0x52
    AUTHENT1A = 0x60
    AUTHENT1B = 0x61

    def __init__(self, sck, mosi, miso, rst, cs):
        self.sck = Pin(sck, Pin.OUT)
        self.mosi = Pin(mosi, Pin.OUT)
        self.miso = Pin(miso)
        self.rst = Pin(rst, Pin.OUT)
        self.cs = Pin(cs, Pin.OUT)
        self.rst.value(0)
        self.cs.value(1)

        board = uname()[0]
        if board == 'esp8266':
            self.spi = SPI(baudrate=100000, polarity=0, phase=0,
                           sck=self.sck, mosi=self.mosi, miso=self.miso)
            self.spi.init()
        elif board == 'esp32':
            # ESP32: используем аппаратный SPI2
            self.spi = SPI(2, baudrate=1000000, polarity=0, phase=0,
                           sck=self.sck, mosi=self.mosi, miso=self.miso)
        elif board in ('WiPy', 'LoPy', 'FiPy'):
            self.spi = SPI(0)
            self.spi.init(SPI.MASTER, baudrate=1000000,
                          pins=(self.sck, self.mosi, self.miso))
        else:
            raise RuntimeError("Unsupported platform")

        self.rst.value(1)
        self.init()

    def _wreg(self, reg, val):
        self.cs.value(0)
        self.spi.write(bytes([(reg << 1) & 0x7E]))
        self.spi.write(bytes([val]))
        self.cs.value(1)

    def _rreg(self, reg):
        self.cs.value(0)
        self.spi.write(bytes([((reg << 1) & 0x7E) | 0x80]))
        val = self.spi.read(1)
        self.cs.value(1)
        return val[0]

    def _sflags(self, reg, mask):
        self._wreg(reg, self._rreg(reg) | mask)

    def _cflags(self, reg, mask):
        self._wreg(reg, self._rreg(reg) & (~mask))

    def _tocard(self, cmd, send):
        recv = []
        bits = irq_en = wait_irq = n = 0
        stat = self.ERR

        if cmd == 0x0E:
            irq_en = 0x12
            wait_irq = 0x10
        elif cmd == 0x0C:
            irq_en = 0x77
            wait_irq = 0x30

        self._wreg(0x02, irq_en | 0x80)
        self._cflags(0x04, 0x80)
        self._sflags(0x0A, 0x80)
        self._wreg(0x01, 0x00)

        for c in send:
            self._wreg(0x09, c)
        self._wreg(0x01, cmd)

        if cmd == 0x0C:
            self._sflags(0x0D, 0x80)

        i = 2000
        while True:
            n = self._rreg(0x04)
            i -= 1
            if not ((i != 0) and not (n & 0x01) and not (n & wait_irq)):
                break

        self._cflags(0x0D, 0x80)

        if i:
            if (self._rreg(0x06) & 0x1B) == 0x00:
                stat = self.OK
                if n & irq_en & 0x01:
                    stat = self.NOTAGERR
                elif cmd == 0x0C:
                    n = self._rreg(0x0A)
                    lbits = self._rreg(0x0C) & 0x07
                    if lbits != 0:
                        bits = (n - 1) * 8 + lbits
                    else:
                        bits = n * 8
                    if n == 0:
                        n = 1
                    elif n > 16:
                        n = 16
                    for _ in range(n):
                        recv.append(self._rreg(0x09))
            else:
                stat = self.ERR
        return stat, recv, bits

    def _crc(self, data):
        self._cflags(0x05, 0x04)
        self._sflags(0x0A, 0x80)
        for c in data:
            self._wreg(0x09, c)
        self._wreg(0x01, 0x03)
        i = 0xFF
        while True:
            n = self._rreg(0x05)
            i -= 1
            if not ((i != 0) and not (n & 0x04)):
                break
        return [self._rreg(0x22), self._rreg(0x21)]

    def init(self):
        self.reset()
        self._wreg(0x2A, 0x8D)
        self._wreg(0x2B, 0x3E)
        self._wreg(0x2D, 30)
        self._wreg(0x2C, 0)
        self._wreg(0x15, 0x40)
        self._wreg(0x11, 0x3D)
        self.antenna_on()

    def reset(self):
        self._wreg(0x01, 0x0F)

    def antenna_on(self, on=True):
        if on and ~(self._rreg(0x14) & 0x03):
            self._sflags(0x14, 0x03)
        else:
            self._cflags(0x14, 0x03)

    def request(self, mode):
        self._wreg(0x0D, 0x07)
        stat, recv, bits = self._tocard(0x0C, [mode])
        if (stat != self.OK) or (bits != 0x10):
            stat = self.ERR
        return stat, bits

    def anticoll(self):
        ser_chk = 0
        ser = [0x93, 0x20]
        self._wreg(0x0D, 0x00)
        stat, recv, bits = self._tocard(0x0C, ser)
        if stat == self.OK:
            if len(recv) == 5:
                for i in range(4):
                    ser_chk ^= recv[i]
                if ser_chk != recv[4]:
                    stat = self.ERR
            else:
                stat = self.ERR
        return stat, recv

    def select_tag(self, ser):
        buf = [0x93, 0x70] + ser[:5]
        buf += self._crc(buf)
        stat, recv, bits = self._tocard(0x0C, buf)
        return self.OK if (stat == self.OK) and (bits == 0x18) else self.ERR

    def auth(self, mode, addr, sect, ser):
        return self._tocard(0x0E, [mode, addr] + sect + ser[:4])[0]

    def stop_crypto1(self):
        self._cflags(0x08, 0x08)

    def read(self, addr):
        data = [0x30, addr]
        data += self._crc(data)
        stat, recv, _ = self._tocard(0x0C, data)
        return recv if stat == self.OK else None

    def write(self, addr, data):
        buf = [0xA0, addr]
        buf += self._crc(buf)
        stat, recv, bits = self._tocard(0x0C, buf)
        if not (stat == self.OK) or not (bits == 4) or not ((recv[0] & 0x0F) == 0x0A):
            stat = self.ERR
        else:
            buf = list(data[:16]) + self._crc(data[:16])
            stat, recv, bits = self._tocard(0x0C, buf)
            if not (stat == self.OK) or not (bits == 4) or not ((recv[0] & 0x0F) == 0x0A):
                stat = self.ERR
        return stat