screensaver management for TFT+TouchUI

here’s how to turn the screensaver off when the printing starts and turn it back on when the printing is done

1. grab the scripts from screensaver folder here and put them into the pi home folder, say under /home/pi/screensaver
2. edit the OctoPrint’s config.yaml - it hides under ~/.octoprint, include the section below:

        enabled: true
        subscriptions:
        -   command: /home/pi/screensaver/startPrint.sh
            event: PrintStarted
            type: system
        -   command: /home/pi/screensaver/endPrint.sh
            event: PrintDone
            type: system
   

3. restart OctoPrint and enjoy your new screensaver behavior!

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