Has either the PaPiRus or Percheron e-Paper display HATs been tried?

Ken New Member Posts: 48
I am interested in possibly doing an automotive application with UP! Boards and was wondering if anyone has tried the daylight readable ePaper displays by either PaPiRus or Percheron? Both of these hats include their own RTC circuits and was also wondering if this causes issues as it seems that this is a common random add on to many hats and redundant to the UP! Board.


  • Dan O'Donovan
    Dan O'Donovan Administrator, Moderator, Emutex Posts: 241 admin
    Hi Irwin

    Regarding the RTC, I don't think this will cause an issue. As it is connected via I2C, it won't be discovered automatically by the kernel - it would have to be explicitly registered as a new device. There's probably a Device Tree overlay included on the EEPROM of the PaPiRus that would declare the RTC, and other devices on the HAT, for the kernel to enable and use. The UP board will ignore this EEPROM and its contents, so shouldn't know that the RTC on the HAT exists.