One third-party wireless LocoNet connection device is a LocoNet-Bluetooth "smartphone interface" device from Mollehem. An english web page for this device is at .
JMRI supports this device via the "BT-LocoBridge" type of LocoNet interface type.
I do not have any practial experience with this product, so cannot advice of its suitability for any particular application. I believe that someone from Mollehem by the name of "Anders" pays attention to this list, and can provide further details.
Regards,
Billybob