The ESP’s dedicated I2C pins are on GPIO 21 and 22 ... getting a 16-bit LED fade in straight C or “Arduino” is easy. But our sights are set on servos. To drive a hobby servo, one needs ...

[Frank Herrmann] had an interesting idea to turn a geared DC motor into a servo motor ... driver’ interface pins hooked up to the motion controller upstream. The Arduino source for this can ...