Emulator

Billiard26 wrote in #note-1:

We don't have control over this. It would require game-specific hacks to make them not disconnect Wii remotes when idle.

If really there is no control over this:

Maybe you can control it in different way, listen the emulated wiimote events, create variable which holding latest event date and update this event date after every input, create interval(works for every second), for example, compare current date and latest date difference, if passed time >= 4 minute 50 seconds, trigger dummy emulated wiimote input to reset idle counter, update the latest event date(variable).

This is just draft suggestion, maybe there is much better way to do this.