Originally Posted by BOB WALKER:
Bluetooth, but don't know if I will get sufficient range.
There is a BlueRail Train’s (as in Beckmann) video showing an HO locomotive being run form an unobstructed range of 150 feet. The open-source DBTC group is planning on using Bluetooth-accessory-controllers that will relay the control signals, this will provide enough range for even the largest layouts.