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    MMM-IT8951

    Scheduled Pinned Locked Moved System
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    • M Offline
      Matuki Module Developer
      last edited by Matuki

      Description:

      This module communicates with a IT8951 card to display MagicMirror² on a e-ink screen. It opens MagicMirror² page on a Chrome browser (with Puppeteer) and observes each DOM update. Periodically, the e-ink is fully refreshed and partially refreshed on DOM update.

      Partial refresh is done in a flashy way by default (that is needed to support the 16 gray levels) but if image is only B/W (without gray), the refresh mode is changed to have a direct update without flash. Another way to have a fast refresh without flash is by adding the CSS class eink-4levels to a module. Thus, the refresh is forced to 4-level gray only.

      The IT8951 is typically used by some Waveshare e-paper screens.

      Screenshots:

      Sample of display with multiple modules:
      d-screen-music.png
      Each module’s area is individually updated when data changes.
      All modules on 4 gray levels are updated seamlessly. Modules on 16 gray levels are updated with a flash area (here: the song cover).

      Additional informations

      Force refresh by notification

      A full refresh can be done by sending a notification IT8951_ASK_FULL_REFRESH.

      Modules forced to 4 or 16 gray levels

      To force gray levels, one need to add classes on modules in config file:

      This class forces non flashy (but only on 4-levels gray) update of this module:

      classes: "eink-4levels",  
      

      This class forces on 16-levels gray (but flashy) update of this module:

      classes: "no-eink-4levels",
      

      Download:

      https://github.com/seb-ma/MMM-IT8951

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