WiFis how many do I need for one TIU & one TMCC Base ? ...one right but is it a Lionel WiFi or an MTH Wifi?

lan,

It's not in Barry's 12 page Addendum

Look at the following on page 3 of the addendum:

Wiring for TMCC Engine Control (Only)

The following wiring methods allow control of TMCC engines, and Legacy engines that are configured as TMCC engines.

Then, look at the diagram on page 3.

The WIU is not shown on any diagrams because it is always required.

OK I  see the diagram, if the WIU  is connected always to the Rs232 on the TIU; then how is the Base connected  to the TIU?  There must be a cable(s) I dont have.

Alan,

OK I  see the diagram, if the WIU  is connected always to the Rs232 on the TIU; then how is the Base connected  to the TIU?  There must be a cable(s) I dont have.

You need an RS232 serial Y cable with 1 male port and 2 female ports. I use this one from Amazon.

thanks  i see how the Explorer TIU WILL MAKE THIS EASIER

Alan,

It will make things easier because it won't allow either full DCS features and functions, , accessory or switch track operation,  or use of TMCC/Legacy engines at all from the app.

The DCS Explorer is not a replacement for a TIU/WIU combination. It is only intended as a DCS entry-level device.

Thanks again; so if I had TIU Rev L, I would NOT need the y-connector as the L has a USB port for the WIU and the TMCC Base would use the Rs232 port?

Alan,

so if I had TIU Rev L, I would NOT need the y-connector as the L has a USB port for the WIU and the TMCC Base would use the Rs232 port?

That's correct.