Script to show system and UPS statistics on a Raspberry Pi with UPS Plus board and 128x64 OLED display.
If you're using Raspbian/Raspberry Pi OS, you'll need to enable I2C using raspi-config. You'll then need to install several dependencies with sudo apt install git i2c-tools python3-pip python3-smbus2 python3-setuptools python3-pil python3-rpi.gpio libraspberrypi-bin.
You'll also need to install the Adafruit INA219 library: sudo pip3 install pi-ina219.
Next, you'll need to download Adafruit's Python library for the OLED display. git clone https://github.com/adafruit/Adafruit_Python_SSD1306.git. Then cd Adafruit_Python_SSD1306.git, sudo python3 setup.py install.
Finally, you'll need to download the font files from https://www.dafont.com/pixel-operator.font. The font file PixelOperator.ttf will need to be placed in the same directory as the executable script.
Change to a convenient directory and run git clone https://github.com/danb35/raspi-ups-stats.
Create /opt/stats/, and copy PixelOperator.ttf and stats.py there.
Then put the systemd unit file in the correct place: sudo cp stats.service /etc/systemd/system/.
Then tell systemd to re-scan the unit files with sudo systemctl daemon-reload, and start this unit using sudo systemctl enable --now stats.
Original source: https://www.the-diy-life.com/mini-raspberry-pi-server-with-built-in-ups/ Based on: https://github.com/adafruit/Adafruit_Python_SSD1306/blob/master/examples/stats.py