display RaspberryPi status (average cpu load, memory usage, temperature & inner-ip) on OLED, using adafruit-circuitpython-ssd1306

• environment: Raspberry Pi 3B+, Raspbian Buster with desktop 2020-02-13

• install PIL:

sudo apt-get install python3-pil

• install adafruit-circuitpython-ssd1306

sudo pip3 install adafruit-circuitpython-ssd1306

notice that sudo used for auto start & stop (service)

• test oledshowstatus.py

• register service:

sudo cp oledstatus /etc/init.d

and reboot, then use sudo service oledstatus start & sudo service oledstatus stop to test

• enable auto start & stop

sudo update-rc.d oledstatus defaults