Cannot get my e paper to work

Hi @allObject & @Gordon, thank you for your input, I found that there were an error in the mapping of the display in the code example:

var display = require('SSD1606').connect({
    displayType: 'GDE021A1',
   spi        : spi,
      cs1Pin     : B6,
      dcPin      : B7,
      resetPin   : A5,
      busyPin    : A8,
      bs1Pin     : A6, 
      powerPin   : A7  
  });

and when I added a simple digitalWrite in the init method, it actually worked.