无法将 RC522 RFID 模块连接到 Raspberry Pi 4

Unable to connect RC522 RFID module to Raspberry Pi 4

我根据 https://pimylifeup.com/raspberry-pi-rfid-rc522/ 将我的 RC522 RFID 模块连接到我的 Raspberry Pi 4 所以我们有 Write.py 和 Read.py:

Write.py:

#!/usr/bin/env python

import RPi.GPIO as GPIO
from mfrc522 import SimpleMFRC522

reader = SimpleMFRC522()

try:
        text = input('New data:')
        print("Now place your tag to write")
        reader.write(text)
        print("Written")
finally:
        GPIO.cleanup()

和Read.py是:

#!/usr/bin/env python

import RPi.GPIO as GPIO
from mfrc522 import SimpleMFRC522

reader = SimpleMFRC522()

try:
        id, text = reader.read()
        print(id)
        print(text)
finally:
        GPIO.cleanup()

但是当我执行 sudo python3 Write.py 时出现这个错误:

Traceback (most recent call last):
  File "Write.py", line 6, in <module>
    reader = SimpleMFRC522()
  File "/usr/local/lib/python3.7/dist-packages/mfrc522/SimpleMFRC522.py", line 14, in __init__
    self.READER = MFRC522()
  File "/usr/local/lib/python3.7/dist-packages/mfrc522/MFRC522.py", line 130, in __init__
    self.spi.open(bus, device)

而对于 Read.py 我们有几乎与 Write.py 相同的执行错误,如下所示:

Traceback (most recent call last):
  File "Read.py", line 6, in <module>
    reader = SimpleMFRC522()
  File "/usr/local/lib/python3.7/dist-packages/mfrc522/SimpleMFRC522.py", line 14, in __init__
    self.READER = MFRC522()
  File "/usr/local/lib/python3.7/dist-packages/mfrc522/MFRC522.py", line 130, in __init__
    self.spi.open(bus, device)
FileNotFoundError: [Errno 2] No such file or directory

FileNotFoundError: [Errno 2] No such file or directory

我尝试了几种方法,但根本不起作用: 1-检查接线 2-使用 python2 3-使用 GUI 和 boot/config.txt 检查启用的 SPI 4-使用 sudo apt-get updatesudo apt-get upgradesudo apt-get install python3-dev python3-pipsudo pip3 install spidev

我尝试lsmod |grep spi检查,结果是:

spidev                 20480  0
spi_bcm2835            24576  0
spi_bcm2835aux         16384  0

你觉得问题是什么?我的 Raspberry Pi 4 也有一个 3.5 英寸的触摸屏 LCD。这是 spi0 被保留的原因吗?如何解决?我什至不能使用 github.com 中的另一个 RC522 程序,它们在 spi.open(bus, device).

中有几乎相同的错误

我找到了简单的答案。只需重新安装 Raspbian OS 以重置 SPI 配置(为 3.5 英寸 LCD 设置),这样 RFID 写入和读取工作正常,一切正常。