For security, I use a key, which isn't really effective because HTTP requests aren't encrypted, so anybody could intercept the key. Still, for my intended use, it's good enough.
This is a very simple Arduino-Sketch for the Teensy - LC with the aim to control a WS2812-RGB-Led from a host-computer through a connected Teensy-LC via USB-Serial We recently built 10 of these Teensy ...
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