man, i couldn't hit the upvote button hard enough. That is a very cool breakout, thank you for the link. I'm already thinkking about that breakout connected to the 16 channel PWM breakout I already have. Now i can play around with servos, and many other things, right from my laptop with all my usual build tools instead of having to power up my pi zero and connect over ssh first. I love Adafruit, they do so many cool things.

If you can do without SPI there's also https://www.adafruit.com/product/4471 You can also just get the chip (MCP2221A) in a DIP package and just pluck it in a breadboard. All you need is two bypass caps and two pullup resistors if you need I2C.