To generate a clock screen with temperature from an Adafruit BMP280 (using a Raspberry Pi)

• Type this command:
  sudo pip3 install adafruit-circuitpython-bmp280
  Then (in prefferences - Raspberry Pi Config - Interfaces) enable I2C.
• Connect the BMP280 to your Raspberry Pi with I2C, as described on the Adafruit website.
  
• Download the Python file here.
  
• The resolution is set to 1980x1020 so you will need the screen to be that or greater.
  A Raspberry Pi 1 is not fast enough to draw this clock every second, better to to use a Raspberry Pi 2 or 3.
• To stop the screen from blanking you can install xscreensaver.
  Open LXTerminal and enter the following line:
  sudo apt-get install xscreensaver
  Reboot. Then and click on start, preferences, screensaver and set the mode to "Disable Screen Saver"


• To draw antialiased lines Pygame requires the colour depth to be either 24 or 32 bits. To set this you'll need to edit the file /boot/config.txt
  You can do this from LXTerminal. Enter:
  cd /boot
  then:
  sudo nano config.txt
  add the line:
  framebuffer_depth=24
  Do not put spaces either side of the equals sign. And save the file (press ctrl+o)


• To get the file to autostart:
  Open filemanager and go to /home/pi/.config/ (you'll have to type in the .config bit as it's a hidden folder)
  Then make a folder called "autostart" In autostart make a new file and call it "Clock.desktop" Edit this file and enter the following text:
  [Desktop Entry]
  Name=Clock
  Exec=gksu python /home/pi/Desktop/Clock.pyw
  StartupNotify=false
  Terminal=false
  Type=Application
  Save the file.
  Also you'll need to edit Clock.pwy again and comment out line 65 and uncomment line 67.
  If you've saved Clock.pyw and logo.png anywhere other than /home/pi/Desktop then you'll need to edit line 67 otherwise it won't be able to find the image.