A tiny hack to read white-on-black on Kobo ebook readers.

Usage

There are three ways to contol nightmode:

• Long-press the LIGHT / HOME button on your device to toggle
• Write into the /tmp/invertScreen fifo-interface
  • Send y to set nightmode to ON
  • Send n to set nightmode to OFF
  • Send t to toggle
• define action 'toggleNightMode' on a (configurable) level of brightness and set and maintain that brightness level through Kobo UI for a (configurable) number of seconds