Is this a peer-to-peer process? i.e you don't need a active cell connection to make it happen?
That's correct.
Locomotives should be no different than musicians!
I'm not so sure about that!
If I understand you correctly, your music system automatically syncs devices. That's fine when all devices always need to be in sync. However, with DCS devices, be they DCS Remotes or smartphones/tablets running the DCS App, automatic syncing is not necessarily desirable. Each instance of DCS information may be unique, with different contents in each.
For example, I have multiple remotes:
- One has all of the 97 DCS engines in it that are run as individual engines. It also has all of my switch tracks, accessories, Routes, and Scenes.
- Another has those engines (12) that run only as lashups (6). In addition, this remote also contains all of my TMCC and Legacy engines (2) and a host of operating cars (20) that use TMCC via installed Electric Railroad Mini Commander boards. This second remote reuses DCS ID#s. It also has all of the same switch tracks, accessories, Routes, and Scenes that are in the first remote.
- A third remote is kept empty of engines and is used for test purposes.
Regarding the DCS App, I've made clone backups of the first two remotes and E-mailed them as attachments to myself on each of my 3 iOS devices. Now, I can load, in a minute or less, the contents of either one of these remotes simply by importing one of the attached files. No Internet or other connection is required, once the E-mails with their attachments are on the subject smartphone or tablet.
This whole scheme would be impossible if these devices automatically synced with each other.
On a related note, auto-syncing is what Legacy does, between all of the Cab-2 remotes, and the iCab and LCS apps. This has both pos and cons.
A pro is that when one goes to a club or some other Legacy layout, any Cab-2 or app that one brings is automatically loaded with the contents of that layout's Legacy command base.
The cons are twofold. A minor one is that in order to run an engine that one brings to another layout, one must add that engine to the layout's Legacy base first. Second, and much more importantly to me, I cannot use the method described above to have more than 100 engines available at al times.
This is by no means a knock on Legacy. Its simply a fundamental difference between the two systems that allows me to run my trains, my way.
The scheme I described above is the subject of Appendix D: More Than 100 Command Control Engines, on pages 191-192 of The DCS WiFi Companion 1st Edition.
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