Fix readme

README.md

@@ -1,37 +1,16 @@
 
-* Workflow
-Uploading:
-- html/js: select image, crop, resize, upload to server
-- upload php: use C program to convert to EPD.
-  Spit out preview (?), add epd to database w/ timestamp
+### What is this?
 
-epd:
-- Wake up
-If Internet:
- * fetch index JSON file (contains OTA plus timestamps of last 10 images)
- * Update files to make internal store match 
- * Update list of image shows: set to 0 for new images
-- Take list of image shows; get lowest show count; show newest image with that count.
+This is the firmware, PCB artwork, schematics and case design for a WiFi-enabled color picture frame.
 
-Flash:
-Other shit: 0x10000
-OTA1: 0x150000
-OTA2: 0x150000
-left: 0x150000
+### Contents
 
-img size 134464
-11 images -> 10 150000
+- case - OpenSCAD program to build the case. Change the 'render' variable to render the various parts.
+- www - PHP and C program running on the server that is used to upload/fetch the pictures.
+- firmware - ESP32C3 firmware. Make sure to run menuconfig to point this at your server.
+- pcb - Schematics and PCB artwork, in Kicad format.
 
+### More information
 
-Case uses M3 inserts: height 4mm dia 5mm
-Corresponding screws: M3*6mm
-
-
-Colors:
-- Grab picture in 'normal' situation (daylight, curtains, ...)
-- Open in Gimp
-- Image -> precision: 16-bit, linear
-- Filters -> blur (to get rid of grain)
-- Curve -> make darker colors a bit more dark (so it mixes more white in there, making end image lighter)
-- Filters -> levels, select black level, select white level
+[Article on Spritesmods](https://spritesmods.com/?art=wifipicframe)
 

notes.txt

@@ -1,19 +0,0 @@
-
-For PCB:
-XR1151 - 800'ish mA, 65uA quiescent -> 3.5 year
-ESP32C3 - need to test if works with same code, otherwise NP
-
-
-Article:
-Color Floyd-Steinberg is a PITA. Difference colors? LAB colors, euclidian thingy. That sucks,
-pink white and blue-ish white is the same difference as red and blue. Initial modification:
-multiply A and B differences (=hue difference) with sin(L). This makes those differences less
-important. Great results. But WtF is up with the shitty 'official' way? Seems there's multiple
-ways: latest and greatest is E2000. Actually not that much different than my hacky solution.
-
-Non-linear color space: one pixel of (0,0,0) and one of (64,64,64) don't look the same 
-(are not as bright) as two of (32,32,32). Luckily (linearized) RGB works.
-
-Stucki dithering?
-
-https://mathematica.stackexchange.com/questions/7483/how-to-calculate-mix-of-4-colors-defined-in-cielab-lab-model