This is a simple program I wrote for a light I bought off of adafruit. They had a sample in python but I wanted to do some stuff with the gokrazy library.
This uses the serial library from bugst to signal state changes to the light. Its a little self contained and may not match your use case, but works for what I need it for (basically a commandline on/off tool). I won't be accepting enhancements to this, but wanted to publish in case anyone else finds it useful.