PPM vs PWM, why choose PPM over PWM and how does PPM work? Answered
I understand the basis of operation of PWM, however, PPM is what confuses me. What is it, and why would I choose to make a system for data transmission using it over PWM? What are the benefits? and also the drawbacks?
I have a Skyfly 6 Ch radio Tx and Rx, it is even remotely possible to squeeze a slow serial data communication (9600 baud) down one of the channels reliably? I was wondering for simple non critical auxiliary mode control, I could have more than one thing controlled by a single channel on the radio, such as lights on or off, acro mode, GPS hold, and GPS return to home mode switch, and other auxiliary things by using a output of a microcontroller to multiplex all of those things with a serial data Tx. I do not want to make any major modifications, possibly use the S video port-like thing on the underside where another slave remote control can go.