[Feature] multiple motors/hubs per train

[Novakasa]

requested on youtube: https://www.youtube.com/watch?v=cBF-G4d4vw8&lc=Ugyaq-p0Sv_qh-kbco94AaABAg

lots of thinking needed for this one though

[Novakasa]

maybe just have a second ble_train assigned to the layout train? Needs to be in a "puppet" mode, and the other hub will be "master" and have the sensor. Maybe allow for two sensors?

[Novakasa]

The issue will be the communication between the two hubs. If it has to go through the PC, this might take too long. Maybe the pybricks advertising communication might work?

[Novakasa]

Right not it should probably be the same program running on "puppet" and "master", where master has the sensor. The hubs will detect automatically whether they have a sensor or not and maybe send that to PC, which can sanity check.
Since sensor advance will be sent from master to PC anyway the PC can forward the sensor advance command to the puppet hub. This will have some delay but hopefully not too much.