0164_Led_Button.md

Led Button

Led&Button板控制

参考文档

• https://github.com/ZengjfOS/RaspberryPi/tree/gpioIrq

硬件设计

https://oshwhub.com/zengjf/USB2TTLBoard_copy_copy_copy_copy

命令行测试功能

• sudo su
• 查看gpio分布情况
  • cat /sys/kernel/debug/gpio
• cd /sys/class/gpio
• led
  • echo 10 > export
  • cd gpio10
  • echo out > direction
  • echo 1 > value
  • echo 0 > value
• button
  • mkdir gpioirq
  • cd gpioirq
  • git init
  • git pull https://github.com/ZengjfOS/RaspberryPi gpioIrq:master
  • sudo ./gpioIrq 9 both

配置

• 参考文档
  • https://www.raspberrypi.org/documentation/remote-access/web-server/apache.md
• sudo apt-get install apache2 apache2-utils
• pip3 install websockets
• sudo service apache2 restart
• sudo apt install php libapache2-mod-php -y
• php log
  • /etc/php/7.3/apache2/php.ini

    ; Log errors to specified file. PHP's default behavior is to leave this value
    ; empty.
    ; http://php.net/error-log
    ; Example:
    error_log = /var/www/html/php_errors.log
    ; Log errors to syslog (Event Log on Windows).
    ;error_log = syslog

• 用户及用户组权限修改，防止没有权限
  • vim /etc/apache2/envvars

    # Since there is no sane way to get the parsed apache2 config in scripts, some
    # settings are defined via environment variables and then used in apache2ctl,
    # /etc/init.d/apache2, /etc/logrotate.d/apache2, etc.
    export APACHE_RUN_USER=pi
    export APACHE_RUN_GROUP=pi

• chmod 777 /var/www/html
  • 默认pi用户无法在该目录创建文件导致无法看到错误信息log和后面我们自己创建的文件，所以添加权限，毕竟不是做产品，而是做尝试；
• sudo service apache2 restart

网页处理

• 网页路径：/var/www/html
• led控制预操作：
  • cd /sys/class/gpio
    • echo 10 > export
    • cd gpio10
    • echo out > direction
• button控制预操作：
  • cd /sys/class/gpio
    • echo 9 > export
    • cd gpio9
    • echo both > edge
• https://github.com/ZengjfOS/RaspberryPi/tree/LowLevelLogicOfIoT
  • sudo su
  • ./config.sh
  • python3 ws.py

IP Camera

• 0163_esp-who.md
• 添加摄像头：

  <div style="margin-top: 60px;">
    <img src="http://192.168.137.2:8008?action=stream">
  </div>

• 显示界面如下：