| ESP32 ESP32S2 AnalogWrite | ESP32 PWM, Servo, Easing and Tone. |
| QuickPID | A fast PID controller with multiple options. Various Integral anti-windup, Proportional and Derivative control modes. |
| sTune | Open loop PID autotuner using a novel s-curve inflection point test method. |
| Toggle | AArduino button debounce library for various switch types, port expanders and other 8-bit data sources. |