So I'm working on a project and it involves making a raspberry pi car, be it from scratch or with the help of can rc car. I chose the latter. Now the problem is I don't really have servo multiplexers being sold anywhere in my country, Bangladesh, so I have no idea how to get a hold of them. I read that their main function was to convert radio signals to PWM signals so that it could be sent to either the servo or the servo driver which would than be sent to the servo. But my project really require the radio control portion of the car, as I would like to control it through wifi with the help of my computer.
So I wanna know firstly and clearly, what is the main function of a servo multiplexer?
Secondly, since I'm not planning on using any sort of radio communication with the car and the remote control but only plan on controlling the car using wifi and my computer, will I really need a servo multiplexer?