Forked from: https://github.com/Lynxmotion/Arduino-PPM/tree/main
This library is intended to be used with an RC (Radio Controlled) transmitter & receiver that stream a PPM (Pulse Position Modulation). This function (PPM) mix all of the available channels in a single stream of information.
More information about RC signals available here: https://en.wikipedia.org/wiki/Servo_control