Watchy remote screen

This is a PoC / dev tool for playing with the Watchy's e-ink screen from a browser.

It is not meant as a finished product (very few safety checks, no auth, hacky code, etc...).

Setup

• Clone this repository

• In src/main.ino set WIFI_SSID and WIFI_PASS to your wifi credentials

• Run pio run - it will fail but it will download dependencies

• Patch .pio/libdeps/esp32dev/GxEPD2/src/GxEPD2_BW.h, add this to a public section of class GxEPD2_BW:

  uint8_t *getBuffer() {
      return _buffer;
  }
  

• You may wish to check platformio.ini to set your serial port and speed and whatnot.

• Upload the firmware:

  pio run -t upload
  pio run -t uploadfs
  

• When the watch reboots it will display its IP address, just visit it with a browser.

  Note: no need to set the IP in the web page (unless you opened the html file another way than from the watch)

Endpoints

• POST /raw: expects a single file in multipart/form-data format of exactly 5000 (200x200/8) bytes. Copies the file into the display buffer and updates the screen.

  eg: curl -F "data=@buffer.bin" http://$WATCHY_IP/raw

• GET /fonts: get a comma-separated list of font names acceptable to /drawText

  eg: curl http://$WATCHY_IP/fonts

• POST /drawText: render text on the watchy and update the display. Expects a application/x-www-form-urlencoded body with the following parameters:

  • f: font name
  • t: text string to display
  • x and y: coordinates to render at (in that weird Adafruit GFX format - some issues with y pointing to the top or baseline)
  • c: if non empty and non zero, clear the full screen before drawing the text
  • i: if non empty and non zero, invert colours. If inverted, text is rendered in white, and if clear is requested, clears to black.

  eg: curl -d "f=FreeMonoBold9pt7b&t=hello&x=0&y=50&c=1&i=0" http://$WATCHY_IP/drawText

License

           DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                   Version 2, December 2004
 
Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>

Everyone is permitted to copy and distribute verbatim or modified
copies of this license document, and changing it is allowed as long
as the name is changed.
 
           DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
  TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

 1. You just DO WHAT THE FUCK YOU WANT TO.