Arduino & www code for under-stair DotStar LED lighting
This is code running on an Adafruit Feather Huzzah ESP32. That particular device supports both a LOT of program memory, and allows you to host a web server and broadcast as an 802.11 WiFi access point. What does this mean? It means the way you interact with the stair lighting is by connecting to a "StairLights" WiFi and popping up the web page http://192.168.4.1/ and interacting with that stuff.
I'm just good enough at Web Tech to make fairly complex, client side applications. I added a single, very special case POST handler in the Arduino code.
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