Check out the DCC-EX website............................... Lots of great ideas/plans for physical throttles too if you don't want to use a cell phone or JMRI.
Sorry, a little late, just saw this today and thought I'd mention a few options if anyone is looking for a physical wireless throttle. It is very easy and inexpensive to add a physical throttle knob now to a phone throttle ....
..... I have print files up to help with that but....
....even without a printer you can easily build something as shown above. More on all of that here and also the print file link ....
https://1fatgmc.com/RailRoad/DCC/page-3.htmlThe throttle above is a little harder to build and you will have about $50 in one but it works great and has most of the options of a commercial one.....
.... can run multiple engines at the came time and/or consists and you can program the keys or any other buttons you want to add. Does require soldering skills but can be built in a day. I love mine and built a second one and don't touch the phone throttle anymore.
The hardware/software designer is Peter Akers who also did EngineDriver so has a lot of features and can easily handle 28 functions via the keyboard or added buttons or both. More on how to build it, print files and shopping list here ....
https://1fatgmc.com/RailRoad/DCC/WiTcontroller-Index.html... and there is at least one more case out there you can print or make your own.
Sumner