Trying to change what happens based on user input

[DaveX]

Expanding on @Robin2's and @nickgammon's serial parsing tutorials I came up with these:

@DaveX

Serial parsing RPN/Postfix:

• My adaptations of @nickgammon's state-machine parser into a switch-case single-letter post-fix parser for commands and numbers. E.g. 4500R 80S 3G or '123 24 /p`:
• V1: Simple RPN number and command parsing and
• V2: RPN 4 function calculator+commands
• V3: Serial control of Stepper speed, acceleration and motion control with RPN calc -- Use Serial to control a stepper with real-time adjustment of Acceleration, Maximum speed and Position, with 4-function calculator.

The V3 interactive stepper control is pretty flexible, if post-fix commands make sense to you:

StepperWithSerialParsingRPNExample - Wokwi ESP32, STM32, Arduino Simulator