@a-i-ks
Raspbian still seems to turn off the display.
Personally, I would install xscreensaver and use that to disable the screensaver.
In your terminal
sudo apt-get install xscreensaver
THEN
sudo reboot
Run xscreensaver. Choose Disable Screensaver. Done.
Please note this module was migrated to use the Dark Sky API and is now available as “MMM-DarkSky24Hours” under https://github.com/thobach/MMM-DarkSky24Hours.