[ScorpiusWireless]

So how?
The chip had Bluetooth both in and out.
It also has wireless Comms in and out 
And it can receive track packets.

Now let’s look at the Arc Pro controller. It sends wirelessly but does not receive any wireless data. There is no Bluetooth but there is a lane change button and a brake button.

So we have 3 ways of sending messages to the Scorpius MPD decoder. The throttle signal, brake button signal and the lane change signal. 
Pressing the lane change button is for lane changing but if the throttle isn’t being used we could use the lane change button.
Once we get the command the MPD we can activate or use some nice functions using Scorpius protocols. Ie turn on lights, turn off lights and flash high beam.
The trigger itself could be used to signal the MPD chip or in conjunction with the lane change button.
The preferred method will be via the brake button. Why? Because as nice as the brake button is the reality is 99% of enthusiasts use dynamic braking. The brake button can now be called the Auxiliary button and sending dots and dashes to the MPD chip via the rails to trigger functions. Example the MOD chip has flashing lights. These could be operated via a unique basic code. 
Example you could have it so by pushing LC and brake button simultaneously whilst the motor is off triggers flashing lights to start or stop.
Brake button is used as a high beam flasher.
There’s quite a few ways to send commands. 

Development continues……