Further improvement of communication with RevPi Gate modules

We improved the stability of the communication with RevPi Gate modules again. It is working quite well on the RevPi Core3.

On the old RevPi Core with CM1 the communication cycle period is increased to 10ms (5ms on a CM3). But a lot of processing time is needed anyway. We recommend to use no more than one RevPi Gate with a RevPi Core.

If you plan to use PiGates we recommend to use a RevPi Core 3.