树莓派3 串口设置脚本

1. 背景

　　项目中使用树莓派 3B+ 外加 zigbee 芯片实现设备与设备之间的通信，但是最初使用的时候，树莓派的串口总显示通信异常。

2. 原因

　　树莓派3的蓝牙与串口是冲突的，只能二选一，系统默认选择的蓝牙，现在需要关闭蓝牙

3. 解决方法

　　

参考：树莓派3 UART(串口)不可用的解决方法
https://www.jianshu.com/p/b828214c6573

4. 后将解决方法及项目所需环境设置写成 BASH 脚本，有需要自取

#! /bin/bash
myFile = "/etc/apt/sources.list.backup"
if [ ! -f "$myFile" ]; then
cp /etc/apt/sources.list /etc/apt/sources.list.backup
echo deb http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ buster main non-free contrib > /etc/apt/sources.list
echo deb-src http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ buster main non-free contrib >> /etc/apt/sources.list
fi

myFile = "/etc/apt/sources.list.d/raspi.list.backup"
if [ ! -f "$myFile" ]; then
cp /etc/apt/sources.list.d/raspi.list /etc/apt/sources.list.d/raspi.list.backup
echo deb http://mirrors.tuna.tsinghua.edu.cn/raspberrypi/ buster main ui > /etc/apt/sources.list.d/raspi.list
fi

apt update
apt upgrade -y
# # 安装必须工具
#apt-get install redis-server -y
apt-get install supervisor -y
apt-get install python3-dev python3-pip -y
apt-get install git -y
apt-get install vim -y
apt-get install sqlite3 -y
apt-get install screen -y
apt-get install python3-venv -y
apt-get install demjson -y
apt-get install hbmqtt -y
apt-get install pyserial-asyncio==0.4 -y
apt-get install aio-pika -y


# # 禁用蓝牙服务
systemctl disable hciuart
myFile="/boot/config.txt.backup"
if [ ! -f "$myFile" ]; then
cp /boot/config.txt /boot/config.txt.backup
echo -e >> /boot/config.txt
echo -e >> /boot/config.txt
echo dtoverlay=pi3-disable-bt >> /boot/config.txt
fi

# 加载看门狗
myFile="/boot/config.txt.backup"
if [ ! -f "$myFile" ]; then
cp /boot/config.txt /boot/config.txt.backup
echo -e >> /boot/config.txt
echo -e >> /boot/config.txt
echo dtparam=watchdog=on >> /boot/config.txt
fi

apt-get install watchdog -y

# 修改配置
myFile="/etc/watchdog.conf.backup"
if [ ! -f "$myFile" ]; then
cp /etc/watchdog.conf /etc/watchdog.conf.backup
echo -e >> /etc/watchdog.conf
echo -e >> /etc/watchdog.conf
echo watchdog-device = /dev/watchdog >> /etc/watchdog.conf
echo max-load-1 = 24 >> /etc/watchdog.conf
echo temperature-sensor = /sys/class/thermal/thermal_zone0/temp >> /etc/watchdog.conf
echo max-temperature = 75000 >> /etc/watchdog.conf
fi

update-rc.d watchdog defaults
/etc/init.d/watchdog start

# 解除端口占用
myFile="/boot/cmdline.txt.backup"
if [ ! -f "$myFile" ]; then
cp /boot/cmdline.txt /boot/cmdline.txt.backup
echo console=serial1,115200 console=tty1 root=PARTUUID=738a4d67-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait > /boot/cmdline.txt
fi

cp supervisor/ngrok.conf /etc/supervisor/conf.d/ngrok.conf