Convert any NodeJS generated canvas to stream data which can be easily handled by Arduino based hardware (like ESP8266) and displayed on the E-Ink display.
I spent a lot of time figuring out how to convert a canvas object to a monochrome picture which can be ease transferred to my ESP8266. Converting canvas to bitmaps was too complicated for me. So finally I decided to prepare a chain of 0 and 1 as information about which pixel should be black. ESP8266 must know the dimensions of the upcoming image but for me, it's not a problem.I know that using strings as raw data is lost of bytes but it was the only way to handle it based on my knowledge.
Download source code and install dependencies:
npm iNow run Node app server:
nodemon appUpload display.ino to your arduino hardware.
Make sure that you know correct IP address of your Node app server. I tested it on localhost so I used my local IP address: 192.168.0.42.
Tested with Waveshare 5.83" E-Ink display and NodeMCU v2.