HTTP server

Runs an HTTP server that will draw images on the screen.
Useful for setting up a small digital frame that can be remotely controlled.

Config

1. In main/server.h, edit WIFI_SSID and WIFI_PASSWORD to match your wifi config
2. In main/main.c, edit n_epd_setup to refer to the right EPD screen

Running

flash (idf.py flash), then connect the EPDiy to a power source (computer is fine).
The endpoints are:

1. GET /, prints the screen temp / height / width as headers
2. POST /clear, clears the screen
3. POST /draw, expects:
   1. a body that is a binary stream already encoded to EPDiy's standards (like the one in dragon.h).
   2. Headers width, height
   3. Optional headers x,y (default to 0)
   4. Optional header clear, if set to nonzero integer will force-clear the screen before drawing

Helper script

send_image.py is a friendlier client.

$ ./send_image.py ESP_IP info
EpdInfo(width=1024, height=768, temperature=20)

$ ./send_image.py ESP_IP clear
# Clears the screen

$ ./send_image.y ESP_IP draw /tmp/spooder-man.png
# Draws on screen

Thanks to argparse, all arguments are visible with --help.
Requires requests and PIL (or Pillow)