• 一个正常运行的 Pi
• 适配 Pi 的 PCD8544 屏幕（之前从马云家买的，现已下架）

• IP，没分到或拔掉网线时显示Link Down
• 系统 uptime
• CPU 的使用率和温度
• 内存的使用情况
• 每隔 4 秒刷新一次

安装 WiringPi

WiringPi is a GPIO access library written in C for the BCM2835 used in the Raspberry Pi.

添加开机启动

If your command runs continuously (perhaps runs an infinite loop) or is likely not to exit, you must be sure to fork the process by adding an ampersand to the end of the command, like so:
python /home/pi/myscript.py &
Otherwise, the script will not end and the Pi will not boot. The ampersand allows the command to run in a separate process and continue booting with the process running.