I got the first of the outputs working. I can set an LED based on JSON from serial. It works fine manually, but with the Python script the Arduino doesn't like the JSON it sends. While trying to debug this, I discovered that the Arduino is sensitive to either fast requests or large requests (or both). I was able to trigger a freakout by sending too many requests (See below).

I'm not sure if this is the ArduinoJson library, an out of memory issue or a buffer overflow. I was getting them earlier on before I defined the length of a char* array. I did make sure I wasn't sending requests until the previous response was sent, so it shouldn't be stacked requests.

I may look into coding a simple JSON parser. Since it doesn't need to handle advanced JSON, just key-value pairs it shouldn't be too bad to do.

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