树莓派4B 开启串口登陆

烧录镜像

• Raspberry Pi OS – Raspberry Pi
• Operating system images – Raspberry Pi OS (64-bit)

ssh
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串口登录

sudo raspi-config

• 3 Interface Options Configure connections to peripherals

  
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• I6 Serial Port Enable/disable shell messages on the serial connection

  
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• Would you like a login shell to be accessible over serial? <Yes>

  
  1650697573(1).png
• The serial login shell is enabled

• The serial interface is enabled

  
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• <Finish>

  
  Finish

dtoverlay -a | grep uart

$ dtoverlay -a | grep uart
  midi-uart0
  midi-uart1
  midi-uart2
  midi-uart3
  midi-uart4
  midi-uart5
  miniuart-bt
  qca7000-uart0
  uart0
  uart1
  uart2
  uart3
  uart4
  uart5

sudo vi /boot/config.txt

[all]
enable_uart=1

dtoverlay=miniuart-bt

ls -alh /dev/serial*

lrwxrwxrwx 1 root root 7 Apr 23 14:40 /dev/serial0 -> ttyS0
lrwxrwxrwx 1 root root 5 Apr 23 14:40 /dev/serial1 -> ttyAMA0

sudo vi /boot/cmdline.txt

console=serial0,115200 root=PARTUUID=86115bdf-02 rootfstype=ext4 fsck.repair=yess rootwait

重启

ls -alh /dev/serial*

lrwxrwxrwx 1 root root 7 Apr 23 14:46 /dev/serial0 -> ttyAMA0
lrwxrwxrwx 1 root root 5 Apr 23 14:46 /dev/serial1 -> ttyS0

MobaXterm Serial Shell